MediumCVE-2024-26863

    Linux Kernel: Use of Uninitialized Memory (CVE-2024-26863)

    Published Last modified Sources: Siemens ProductCERT, SUSE, Debian, Red Hat, BSI, EUVD, CVE.org

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    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: hsr: Fix uninit-value access in hsr_get_node() KMSAN reported the following uninit-value access issue [1]: ===================================================== BUG: KMSAN: uninit-value in hsr_get_node+0xa2e/0xa40 net/hsr/hsr_framereg.c:246 hsr_get_node+0xa2e/0xa40 net/hsr/hsr_framereg.c:246 fill_frame_info net/hsr/hsr_forward.c:577 [inline] hsr_forward_skb+0xe12/0x30e0 net/hsr/hsr_forward.c:615 hsr_dev_xmit+0x1a1/0x270 net/hsr/hsr_device.c:223 __netdev_start_xmit include/linux/netdevice.h:4940 [inline] netdev_start_xmit include/linux/netdevice.h:4954 [inline] xmit_one net/core/dev.c:3548 [inline] dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564 __dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349 dev_queue_xmit include/linux/netdevice.h:3134 [inline] packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3087 [inline] packet_sendmsg+0x8b1d/0x9f30 net/packet/af_packet.c:3119 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x5e9/0xb10 mm/slub.c:3523 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560 __alloc_skb+0x318/0x740 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6334 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2787 packet_alloc_skb net/packet/af_packet.c:2936 [inline] packet_snd net/packet/af_packet.c:3030 [inline] packet_sendmsg+0x70e8/0x9f30 net/packet/af_packet.c:3119 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b CPU: 1 PID: 5033 Comm: syz-executor334 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ===================================================== If the packet type ID field in the Ethernet header is either ETH_P_PRP or ETH_P_HSR, but it is not followed by an HSR tag, hsr_get_skb_sequence_nr() reads an invalid value as a sequence number. This causes the above issue.

    Update Linux Kernel to version 4.19.311, Linux Kernel to version 5.4.273, Linux Kernel to version 5.10.214.

    Affected
    • Linux Kernel lt 3.17..4.19.311
    • Linux Kernel lt 4.20..5.4.273
    • Linux Kernel lt 5.5..5.10.214
    • Linux Kernel lt 5.11..5.15.153
    • Linux Kernel lt 5.16..6.1.83
    • Linux Kernel lt 6.2..6.6.23
    • Linux Kernel lt 6.7..6.7.11
    • Linux Kernel lt 6.8..6.8.2
    Fixed in
    • Linux Kernel 4.19.311
    • Linux Kernel 5.4.273
    • Linux Kernel 5.10.214
    • Linux Kernel 5.15.153
    • Linux Kernel 6.1.83
    • Linux Kernel 6.6.23
    • Linux Kernel 6.7.11
    • Linux Kernel 6.8.2
    • Linux Kernel 6.9

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    5.5

    XIEM Effective CVSS

    Highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    5.5

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: Siemens ProductCERT, SUSE, Debian, Red Hat, BSI, EUVD, CVE.org

    0.3 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 16.4

    Show all metrics
    Severity
    Medium
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    34.50 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    5.5 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    5.5
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.3 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    16.4
    Elevated — this CVE ranks above at least 10% of all CVEs scored today.
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: none known · not automatable · Technical impact: partial
    Source: CISA Vulnrichment, as of 10 May 2024

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    In the Linux kernel, the following vulnerability has been resolved: hsr: Fix uninit-value access in hsr_get_node() KMSAN reported the following uninit-value access issue [1]: ===================================================== BUG: KMSAN: uninit-value in hsr_get_node+0xa2e/0xa40 net/hsr/hsr_framereg.c:246 hsr_get_node+0xa2e/0xa40 net/hsr/hsr_framereg.c:246 fill_frame_info net/hsr/hsr_forward.c:577 [inline] hsr_forward_skb+0xe12/0x30e0 net/hsr/hsr_forward.c:615 hsr_dev_xmit+0x1a1/0x270 net/hsr/hsr_device.c:223 __netdev_start_xmit include/linux/netdevice.h:4940 [inline] netdev_start_xmit include/linux/netdevice.h:4954 [inline] xmit_one net/core/dev.c:3548 [inline] dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564 __dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349 dev_queue_xmit include/linux/netdevice.h:3134 [inline] packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3087 [inline] packet_sendmsg+0x8b1d/0x9f30 net/packet/af_packet.c:3119 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x5e9/0xb10 mm/slub.c:3523 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560 __alloc_skb+0x318/0x740 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6334 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2787 packet_alloc_skb net/packet/af_packet.c:2936 [inline] packet_snd net/packet/af_packet.c:3030 [inline] packet_sendmsg+0x70e8/0x9f30 net/packet/af_packet.c:3119 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b CPU: 1 PID: 5033 Comm: syz-executor334 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ===================================================== If the packet type ID field in the Ethernet header is either ETH_P_PRP or ETH_P_HSR, but it is not followed by an HSR tag, hsr_get_skb_sequence_nr() reads an invalid value as a sequence number. This causes the above issue. This patch fixes the issue by returning NULL if the Ethernet header is not followed by an HSR tag.

    Source: siemens_advisory, suse_csaf, Debian Security Advisories, redhat_csaf, BSI CSAF, BSI WID Portal, ENISA EUVD, NVD (NIST), cvelistv5

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    LinuxLinux
    • 6.8 – < 6.8.2
    • 5.11 – < 5.15.153
    • 5.16 – < 6.1.83
    • —
    • 5.5 – < 5.10.214
    • 3.17 – < 4.19.311
    • 6.2 – < 6.6.23
    • 6.7 – < 6.7.11
    • 4.20 – < 5.4.273
    • 6.8.2
    • 5.15.153
    • 6.1.83
    • 6.9
    • 5.10.214
    • 4.19.311
    • 6.6.23
    • 6.7.11
    • 5.4.273

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebiandebian_linux10.0
    Linuxdebianlinuxbullseye
    Linuxlinuxlinux_kernel—

    References & sources

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedLinux

      Show 27 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
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      https://git.kernel.org/stable/c/09e5cdbe2cc88c3c758927644a3eb02fac317209
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      https://git.kernel.org/stable/c/1ed222ca7396938eb1ab2d034f1ba0d8b00a7122
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      https://git.kernel.org/stable/c/39cc316fb3bc5e7c9dc5eed314fe510d119c6862
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      https://git.kernel.org/stable/c/7fb2d4d6bb1c85f7a23aace0ed6c86a95dea792a
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      https://git.kernel.org/stable/c/889ed056eae7fda85b769a9ab33c093379c45428
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      https://git.kernel.org/stable/c/97d2148ea435dff4b4e71817c9032eb321bcd37e
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      https://git.kernel.org/stable/c/a809bbfd0e503351d3051317288a70a4569a4949
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      https://git.kernel.org/stable/c/ddbec99f58571301679addbc022256970ca3eac6
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      https://git.kernel.org/stable/c/e3b2bfb8ff1810a537b2aa55ba906a6743ed120c
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      https://git.kernel.org/stable/c/09e5cdbe2cc88c3c758927644a3eb02fac317209
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      https://git.kernel.org/stable/c/1ed222ca7396938eb1ab2d034f1ba0d8b00a7122
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      https://git.kernel.org/stable/c/39cc316fb3bc5e7c9dc5eed314fe510d119c6862
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      https://git.kernel.org/stable/c/7fb2d4d6bb1c85f7a23aace0ed6c86a95dea792a
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      https://git.kernel.org/stable/c/889ed056eae7fda85b769a9ab33c093379c45428
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      https://git.kernel.org/stable/c/97d2148ea435dff4b4e71817c9032eb321bcd37e
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      https://git.kernel.org/stable/c/a809bbfd0e503351d3051317288a70a4569a4949
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      https://git.kernel.org/stable/c/ddbec99f58571301679addbc022256970ca3eac6
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      https://git.kernel.org/stable/c/e3b2bfb8ff1810a537b2aa55ba906a6743ed120c
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      Reference typeremoved
      https://git.kernel.org/stable/c/09e5cdbe2cc88c3c758927644a3eb02fac317209 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/1ed222ca7396938eb1ab2d034f1ba0d8b00a7122 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/39cc316fb3bc5e7c9dc5eed314fe510d119c6862 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/7fb2d4d6bb1c85f7a23aace0ed6c86a95dea792a Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/889ed056eae7fda85b769a9ab33c093379c45428 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/97d2148ea435dff4b4e71817c9032eb321bcd37e Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/a809bbfd0e503351d3051317288a70a4569a4949 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/ddbec99f58571301679addbc022256970ca3eac6 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/e3b2bfb8ff1810a537b2aa55ba906a6743ed120c Types: Patch
      —

      Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    2. Record modifiedCVE Program

      Show 33 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/09e5cdbe2cc88c3c758927644a3eb02fac317209
      Referenceadded
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      https://git.kernel.org/stable/c/1ed222ca7396938eb1ab2d034f1ba0d8b00a7122
      Referenceadded
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      https://git.kernel.org/stable/c/39cc316fb3bc5e7c9dc5eed314fe510d119c6862
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      https://git.kernel.org/stable/c/7fb2d4d6bb1c85f7a23aace0ed6c86a95dea792a
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      https://git.kernel.org/stable/c/889ed056eae7fda85b769a9ab33c093379c45428
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      https://git.kernel.org/stable/c/97d2148ea435dff4b4e71817c9032eb321bcd37e
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      https://git.kernel.org/stable/c/a809bbfd0e503351d3051317288a70a4569a4949
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      https://git.kernel.org/stable/c/ddbec99f58571301679addbc022256970ca3eac6
      Referenceadded
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      https://git.kernel.org/stable/c/e3b2bfb8ff1810a537b2aa55ba906a6743ed120c
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      https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
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      https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
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      https://git.kernel.org/stable/c/09e5cdbe2cc88c3c758927644a3eb02fac317209
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      https://git.kernel.org/stable/c/1ed222ca7396938eb1ab2d034f1ba0d8b00a7122
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      https://git.kernel.org/stable/c/39cc316fb3bc5e7c9dc5eed314fe510d119c6862
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      https://git.kernel.org/stable/c/7fb2d4d6bb1c85f7a23aace0ed6c86a95dea792a
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      https://git.kernel.org/stable/c/889ed056eae7fda85b769a9ab33c093379c45428
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      https://git.kernel.org/stable/c/97d2148ea435dff4b4e71817c9032eb321bcd37e
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      https://git.kernel.org/stable/c/a809bbfd0e503351d3051317288a70a4569a4949
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      https://git.kernel.org/stable/c/ddbec99f58571301679addbc022256970ca3eac6
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      https://git.kernel.org/stable/c/e3b2bfb8ff1810a537b2aa55ba906a6743ed120c
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      https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
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      https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
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      Reference typeremoved
      https://git.kernel.org/stable/c/09e5cdbe2cc88c3c758927644a3eb02fac317209 Types: Patch
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      https://git.kernel.org/stable/c/1ed222ca7396938eb1ab2d034f1ba0d8b00a7122 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/39cc316fb3bc5e7c9dc5eed314fe510d119c6862 Types: Patch
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      https://git.kernel.org/stable/c/7fb2d4d6bb1c85f7a23aace0ed6c86a95dea792a Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/889ed056eae7fda85b769a9ab33c093379c45428 Types: Patch
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      https://git.kernel.org/stable/c/97d2148ea435dff4b4e71817c9032eb321bcd37e Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/a809bbfd0e503351d3051317288a70a4569a4949 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/ddbec99f58571301679addbc022256970ca3eac6 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/e3b2bfb8ff1810a537b2aa55ba906a6743ed120c Types: Patch
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      Reference typeremoved
      https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html Types: Mailing List
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      Reference typeremoved
      https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html Types: Mailing List
      —

      Source identifier: af854a3a-2127-422b-91ae-364da2661108

    3. Record modifiedSiemens ADP

      Show 5 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2024/26xxx/CVE-2024-26863.json">CVE-2024-26863</a>
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-265688.html
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-398330.html
      Referenceremoved
      https://cert-portal.siemens.com/productcert/html/ssa-265688.html
      —
      Referenceremoved
      https://cert-portal.siemens.com/productcert/html/ssa-398330.html
      —

      Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

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    <a href="https://intel.neosec.eu/en/cve/CVE-2024-26863"><img src="https://intel.neosec.eu/badge/cve/CVE-2024-26863.svg?lang=en" alt="CVE-2024-26863 – NEOSEC Intel" height="20"></a>