MediumCVE-2024-26859

    Linux Kernel: NULL Pointer Dereference (CVE-2024-26859)

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

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    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: net/bnx2x: Prevent access to a freed page in page_pool Fix race condition leading to system crash during EEH error handling During EEH error recovery, the bnx2x driver's transmit timeout logic could cause a race condition when handling reset tasks. The bnx2x_tx_timeout() schedules reset tasks via bnx2x_sp_rtnl_task(), which ultimately leads to bnx2x_nic_unload().

    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 4.2..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

    4.7

    XIEM Effective CVSS

    Highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    4.7

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: Siemens ProductCERT, Debian, BSI, EUVD, CVE.org

    0.2 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 7.9

    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
    28.85 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
    4.7 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
    4.7
    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
    0.2 %
    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
    7.9
    Low — this CVE sits in the lower 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 23 April 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: net/bnx2x: Prevent access to a freed page in page_pool Fix race condition leading to system crash during EEH error handling During EEH error recovery, the bnx2x driver's transmit timeout logic could cause a race condition when handling reset tasks. The bnx2x_tx_timeout() schedules reset tasks via bnx2x_sp_rtnl_task(), which ultimately leads to bnx2x_nic_unload(). In bnx2x_nic_unload() SGEs are freed using bnx2x_free_rx_sge_range(). However, this could overlap with the EEH driver's attempt to reset the device using bnx2x_io_slot_reset(), which also tries to free SGEs. This race condition can result in system crashes due to accessing freed memory locations in bnx2x_free_rx_sge() 799 static inline void bnx2x_free_rx_sge(struct bnx2x *bp, 800 struct bnx2x_fastpath *fp, u16 index) 801 { 802 struct sw_rx_page *sw_buf = &fp->rx_page_ring[index]; 803 struct page *page = sw_buf->page; .... where sw_buf was set to NULL after the call to dma_unmap_page() by the preceding thread. EEH: Beginning: 'slot_reset' PCI 0011:01:00.0#10000: EEH: Invoking bnx2x->slot_reset() bnx2x: [bnx2x_io_slot_reset:14228(eth1)]IO slot reset initializing... bnx2x 0011:01:00.0: enabling device (0140 -> 0142) bnx2x: [bnx2x_io_slot_reset:14244(eth1)]IO slot reset --> driver unload Kernel attempted to read user page (0) - exploit attempt? (uid: 0) BUG: Kernel NULL pointer dereference on read at 0x00000000 Faulting instruction address: 0xc0080000025065fc Oops: Kernel access of bad area, sig: 11 [#1] ..... Call Trace: [c000000003c67a20] [c00800000250658c] bnx2x_io_slot_reset+0x204/0x610 [bnx2x] (unreliable) [c000000003c67af0] [c0000000000518a8] eeh_report_reset+0xb8/0xf0 [c000000003c67b60] [c000000000052130] eeh_pe_report+0x180/0x550 [c000000003c67c70] [c00000000005318c] eeh_handle_normal_event+0x84c/0xa60 [c000000003c67d50] [c000000000053a84] eeh_event_handler+0xf4/0x170 [c000000003c67da0] [c000000000194c58] kthread+0x1c8/0x1d0 [c000000003c67e10] [c00000000000cf64] ret_from_kernel_thread+0x5c/0x64 To solve this issue, we need to verify page pool allocations before freeing.

    Source: siemens_advisory, Debian Security Advisories, 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
    • 4.2 – < 4.19.311
    • —
    • 5.5 – < 5.10.214
    • 6.2 – < 6.6.23
    • 6.7 – < 6.7.11
    • 4.20 – < 5.4.273
    • 6.8.2
    • 5.15.153
    • 6.1.83
    • 4.19.311
    • 6.9
    • 5.10.214
    • 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
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      https://git.kernel.org/stable/c/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb
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      https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec
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      https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4
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      https://git.kernel.org/stable/c/7bcc090c81116c66936a7415f2c6b1483a4bcfd9
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      https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699
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      https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598
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      https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68
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      https://git.kernel.org/stable/c/cf7d8cba639ae792a42c2a137b495eac262ac36c
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      https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d
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      https://git.kernel.org/stable/c/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb
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      https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec
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      https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4
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      https://git.kernel.org/stable/c/7bcc090c81116c66936a7415f2c6b1483a4bcfd9
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      https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699
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      https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598
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      https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68
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      https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d
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      https://git.kernel.org/stable/c/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4 Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/7bcc090c81116c66936a7415f2c6b1483a4bcfd9 Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699 Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598 Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68 Types: Mailing List, Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/cf7d8cba639ae792a42c2a137b495eac262ac36c Types: Mailing List, Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d Types: Mailing List, 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
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      https://git.kernel.org/stable/c/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb
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      https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec
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      https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4
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      https://git.kernel.org/stable/c/7bcc090c81116c66936a7415f2c6b1483a4bcfd9
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      https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699
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      https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598
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      https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68
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      https://git.kernel.org/stable/c/cf7d8cba639ae792a42c2a137b495eac262ac36c
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      https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d
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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/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb
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      https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec
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      https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4
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      https://git.kernel.org/stable/c/7bcc090c81116c66936a7415f2c6b1483a4bcfd9
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      https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699
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      https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598
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      https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68
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      https://git.kernel.org/stable/c/cf7d8cba639ae792a42c2a137b495eac262ac36c
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      https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d
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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/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4 Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/7bcc090c81116c66936a7415f2c6b1483a4bcfd9 Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699 Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598 Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68 Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/cf7d8cba639ae792a42c2a137b495eac262ac36c Types: Mailing List, Patch
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      https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d Types: Mailing List, 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 3 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-2024-26859.json">CVE-2024-26859</a>
      Referenceadded
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      https://cert-portal.siemens.com/productcert/html/ssa-265688.html
      Referenceremoved
      https://cert-portal.siemens.com/productcert/html/ssa-265688.html
      —

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

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