What’s Vulnerable › Vulnerabilities

CVE-2021-46948: sfc: farch: fix TX queue lookup in TX event handling

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-27 · updated 2026-08-04
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: sfc: farch: fix TX queue lookup in TX event handling We're starting from a TXQ label, not a TXQ type, so efx_channel_get_tx_queue() is inappropriate (and could return NULL, leading to panics).

Affected products

• Linux kernel: from 5.10.0 before 5.10.36; from 5.11.0 before 5.11.20; from 5.12.0 before 5.12.3 — fixed in 5.10.36, 5.11.20, 5.12.3

How to fix

Upgrade to a fixed version: Linux kernel 5.10.36, 5.11.20, 5.12.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/35c7a83ad1bb1d48ae249346e61b1132bcbf9052
• https://git.kernel.org/stable/c/83b09a1807415608b387c7bc748d329fefc5617e
• https://git.kernel.org/stable/c/bf2b941d0a6f2d3b9f5fa3c4c21bdd54f71ce253
• https://git.kernel.org/stable/c/e531db1ea6f98c9612cb2de093a107c7eadfb96c
• https://git.kernel.org/stable/c/35c7a83ad1bb1d48ae249346e61b1132bcbf9052
• https://git.kernel.org/stable/c/83b09a1807415608b387c7bc748d329fefc5617e
• https://git.kernel.org/stable/c/bf2b941d0a6f2d3b9f5fa3c4c21bdd54f71ce253
• https://git.kernel.org/stable/c/e531db1ea6f98c9612cb2de093a107c7eadfb96c

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