Intel

CVE-2026-53275

Security update for the Linux Kernel

highEPSS 0.3%

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix use-after-free when processing MLD queries When processing an MLD query, a pointer to the multicast group address is retrieved when initially parsing the packet. This pointer is later dereferenced without being reloaded despite the fact that the skb header might have been reallocated following the pskb_may_pull() calls, leading to a use-after-free [1]. Fix by copying the multicast group address when the packet is initially parsed. [1] BUG: KASAN: slab-use-after-free in __mld_query_work (net/ipv6/mcast.c:1512) Read of size 8 at addr ffff8881154b8e90 by task kworker/4:1/118 Workqueue: mld mld_query_work Call Trace: <TASK> dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120) print_address_description.constprop.0 (mm/kasan/report.c:378) print_report (mm/kasan/report.c:482) kasan_report (mm/kasan/report.c:595) __mld_query_work (net/ipv6/mcast.c:1512) mld_query_work (net/ipv6/mcast.c:1563) process_one_work (kernel/workqueue.c:3314) worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245) </TASK> [...] Freed by task 118: kasan_save_stack (mm/kasan/common.c:57) kasan_save_track (mm/kasan/common.c:78) kasan_save_free_info (mm/kasan/generic.c:584) __kasan_slab_free (mm/kasan/common.c:253 mm/kasan/common.c:285) kfree (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6251 mm/slub.c:6566) pskb_expand_head (net/core/skbuff.c:2335) __pskb_pull_tail (net/core/skbuff.c:2878 (discriminator 4)) __mld_query_work (net/ipv6/mcast.c:1495 (discriminator 1)) mld_query_work (net/ipv6/mcast.c:1563) process_one_work (kernel/workqueue.c:3314) worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245)

Source: SUSE_CSAFUBUNTU_USNSIEMENS_ADVISORYUBUNTU_USNUBUNTU_USNMSRCCVELISTV5NVDCVEORG

Metrics

Severity
high
Priority score
238.98
KEV status
—
Exploit maturity
no public PoC known
XIEM Effective CVSS
8.8
Source: cna-v3
CVSS v3
8.8
CVSS v4
—
EPSS percentile
17.0 %
Elevated — this CVE ranks above at least 10% of all CVEs scored today.
EPSS score
0.3 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-08-12 11:31 UTC
CWE
—

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. CVE Modified2026-09-08 09:18 UTC· 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
    • Affected: New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/53xxx/CVE-2026-53275.json">CVE-2026-53275</a>
    • Reference: https://cert-portal.siemens.com/productcert/html/ssa-019113.html
  2. Initial Analysis2026-07-08 04:00 UTC· nvd@nist.gov
    • CWE: CWE-416
    • CPE Configuration: OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.94 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.15 up to (excluding) 5.15.210
    • Reference Type: kernel.org: https://git.kernel.org/stable/c/087dbacf897c020f438f780f0a4a8aa73b6d7c5a Types: Patch
    • Reference Type: kernel.org: https://git.kernel.org/stable/c/1354271c89d0e5fbf8b3d94097ff0216695209c7 Types: Patch

Affected operating systems

  • linux

    amazon / amazon_linux

  • linux

    suse / basesystem_module15

  • linux

    debian / debian_linux11.0

  • linux

    debian / debian_linux12.0

  • linux

    debian / debian_linux13.0

  • linux

    suse / development_tools_module15

  • linux

    redhat / enterprise_linux10.0

  • linux

    redhat / enterprise_linux7.0

  • linux

    redhat / enterprise_linux8.0

  • linux

    redhat / enterprise_linux9.0

  • linux

    redhat / enterprise_linux_aus8.4

  • linux

    redhat / enterprise_linux_aus8.6

  • linux

    redhat / enterprise_linux_eus10.0

  • linux

    redhat / enterprise_linux_eus8.4

  • linux

    redhat / enterprise_linux_eus9.4

  • linux

    redhat / enterprise_linux_eus9.6

  • linux

    redhat / enterprise_linux_tus8.6

  • linux

    redhat / enterprise_linux_tus8.8

  • linux

    redhat / enterprise_linux_update_services_for_sap_solutions8.6

  • linux

    redhat / enterprise_linux_update_services_for_sap_solutions8.8

  • linux

    redhat / enterprise_linux_update_services_for_sap_solutions9.0

  • linux

    redhat / enterprise_linux_update_services_for_sap_solutions9.2

  • linux

    opensuse / leap15.3

  • linux

    opensuse / leap15.4

Affected products

Products and version ranges extracted from the vendor/CERT advisory. A range like „<4.14.6“ implies the update recommendation „upgrade to 4.14.6 or later“.

  • arista

    cloudvision_agni2024.4.0 – 2025.2.2

  • arista

    cloudvision_portal2024.2.0 – 2026.1.0

  • arista

    velocloud_edge4.5.0 – 6.4.1

  • arista

    velocloud_gateway

  • arista

    velocloud_orchestrator

  • redhat

    openshift_container_platform4.12 – 4.12.89

  • redhat

    openshift_container_platform4.13 – 4.13.66

  • redhat

    openshift_container_platform4.14 – 4.14.65

  • redhat

    openshift_container_platform4.15 – 4.15.64

  • redhat

    openshift_container_platform4.16 – 4.16.61

  • redhat

    openshift_container_platform4.17 – 4.17.53

  • redhat

    openshift_container_platform4.18 – 4.18.40

  • redhat

    openshift_container_platform4.19 – 4.19.30

  • redhat

    openshift_container_platform4.20 – 4.20.21

  • redhat

    openshift_container_platform4.21 – 4.21.14

  • redhat

    openshift_container_platform

  • siemens

    simatic_ax_runtime

  • suse

    caas_platform

  • suse

    enterprise_storage

  • suse

    manager_proxy

  • suse

    manager_retail_branch_server

  • suse

    manager_server

  • suse

    openstack_cloud

  • suse

    openstack_cloud_crowbar

References & sources

Linked CVEs

Show 164 more CVEs
IDCVE-2026-53275