CVE-2024-26855: net: ice: Fix potential NULL pointer dereference in ice_bridge_setlink()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-04-17 · updated 2026-10-15
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: net: ice: Fix potential NULL pointer dereference in ice_bridge_setlink() The function ice_bridge_setlink() may encounter a NULL pointer dereference if nlmsg_find_attr() returns NULL and br_spec is dereferenced subsequently in nla_for_each_nested(). To address this issue, add a check to ensure that br_spec is not NULL before proceeding with the nested attribute iteration.

Affected products

Debian Linux: 10.0
Linux kernel: from 4.20 before 5.4.272; from 5.5 before 5.10.213; from 5.11 before 5.15.152; from 5.16 before 6.1.82; from 6.2 before 6.6.22; from 6.7 before 6.7.10 — fixed in 5.10.213, 5.15.152, 5.4.272, 6.1.82, 6.6.22, 6.7.10

How to fix

Upgrade to a fixed version: Linux kernel 5.10.213, 5.15.152, 5.4.272, 6.1.82. Check the vendor advisory for mitigations.

References

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