What’s Vulnerable › Vulnerabilities

CVE-2024-40937: gve: Clear napi->skb before dev_kfree_skb_any()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-12 · updated 2026-08-04

Description

In the Linux kernel, the following vulnerability has been resolved: gve: Clear napi->skb before dev_kfree_skb_any() gve_rx_free_skb incorrectly leaves napi->skb referencing an skb after it is freed with dev_kfree_skb_any(). This can result in a subsequent call to napi_get_frags returning a dangling pointer. Fix this by clearing napi->skb before the skb is freed.

Affected products

• Linux kernel: from 5.14 before 5.15.162; from 5.16 before 6.1.95; from 6.2 before 6.6.35; from 6.7 before 6.9.6; 6.10-rc1, 6.10-rc2, 6.10-rc3 — fixed in 5.15.162, 6.1.95, 6.6.35, 6.9.6

How to fix

Upgrade to a fixed version: Linux kernel 5.15.162, 6.1.95, 6.6.35, 6.9.6. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2ce5341c36993b776012601921d7688693f8c037
• https://git.kernel.org/stable/c/6f4d93b78ade0a4c2cafd587f7b429ce95abb02e
• https://git.kernel.org/stable/c/75afd8724739ee5ed8165acde5f6ac3988b485cc
• https://git.kernel.org/stable/c/a68184d5b420ea4fc7e6b7ceb52bbc66f90d3c50
• https://git.kernel.org/stable/c/d221284991118c0ab16480b53baecd857c0bc442
• https://git.kernel.org/stable/c/2ce5341c36993b776012601921d7688693f8c037
• https://git.kernel.org/stable/c/6f4d93b78ade0a4c2cafd587f7b429ce95abb02e
• https://git.kernel.org/stable/c/75afd8724739ee5ed8165acde5f6ac3988b485cc
• https://git.kernel.org/stable/c/a68184d5b420ea4fc7e6b7ceb52bbc66f90d3c50
• https://git.kernel.org/stable/c/d221284991118c0ab16480b53baecd857c0bc442
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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