CVE-2024-36929: net: core: reject skb_copy(_expand) for fraglist GSO skbs

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-30 · updated 2026-10-15
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: net: core: reject skb_copy(_expand) for fraglist GSO skbs SKB_GSO_FRAGLIST skbs must not be linearized, otherwise they become invalid. Return NULL if such an skb is passed to skb_copy or skb_copy_expand, in order to prevent a crash on a potential later call to skb_gso_segment.

Affected products

Debian Linux: 10.0
Linux kernel: from 5.6 before 5.10.217; from 5.11 before 5.15.159; from 5.16 before 6.1.91; from 6.2 before 6.6.31; from 6.7 before 6.8.10; 6.9-rc1, 6.9-rc2, 6.9-rc3, 6.9-rc4, 6.9-rc5, 6.9-rc6 — fixed in 5.10.217, 5.15.159, 6.1.91, 6.6.31, 6.8.10

How to fix

Upgrade to a fixed version: Linux kernel 5.10.217, 5.15.159, 6.1.91, 6.6.31. Check the vendor advisory for mitigations.

References

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