What’s Vulnerable › Vulnerabilities

CVE-2022-49084: qede: confirm skb is allocated before using

• 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: 2025-02-26 · updated 2026-08-04
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: qede: confirm skb is allocated before using qede_build_skb() assumes build_skb() always works and goes straight to skb_reserve(). However, build_skb() can fail under memory pressure. This results in a kernel panic because the skb to reserve is NULL. Add a check in case build_skb() failed to allocate and return NULL. The NULL return is handled correctly in callers to qede_build_skb().

Affected products

• Linux kernel: from 4.18 before 4.19.238; from 4.20 before 5.4.189; from 5.5 before 5.10.111; from 5.11 before 5.15.34; from 5.16 before 5.16.20; from 5.17 before 5.17.3 — fixed in 4.19.238, 5.10.111, 5.15.34, 5.16.20, 5.17.3, 5.4.189

How to fix

Upgrade to a fixed version: Linux kernel 4.19.238, 5.10.111, 5.15.34, 5.16.20. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/034a92c6a81048128fc7b18d278d52438a13902a
• https://git.kernel.org/stable/c/4e910dbe36508654a896d5735b318c0b88172570
• https://git.kernel.org/stable/c/8928239e5e2e460d95b8a0b89f61671625e7ece0
• https://git.kernel.org/stable/c/9648adb1b3ece55c657d3a4f52bfee663b710dfe
• https://git.kernel.org/stable/c/b2d6b3db9d1cf80908964036dbe1c52a86b1afb1
• https://git.kernel.org/stable/c/c9bdce2359b5f4986eb38d1e81865b3586cc20d2
• https://git.kernel.org/stable/c/e1fd0c42acfa22bb34d2ab6a111484f466ab8093

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