CVE-2026-23165: sfc: fix deadlock in RSS config read

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-14 · updated 2026-06-17
Weakness: CWE-667

Description

In the Linux kernel, the following vulnerability has been resolved: sfc: fix deadlock in RSS config read Since cited commit, core locks the net_device's rss_lock when handling ethtool -x command, so driver's implementation should not lock it again. Remove the latter.

Affected products

Linux kernel: from 6.17 before 6.18.9; 6.19-rc1, 6.19-rc2, 6.19-rc3, 6.19-rc4, 6.19-rc5, 6.19-rc6 (+1) — fixed in 6.18.9

How to fix

Upgrade to a fixed version: Linux kernel 6.18.9. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/590c8179ffb01c17644181408821b55b8704c50c
https://git.kernel.org/stable/c/944c614b0a7afa5b87612c3fb557b95a50ad654c

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