Bug 2439922 (CVE-2026-23165)

Summary: CVE-2026-23165 kernel: sfc: fix deadlock in RSS config read
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A deadlock vulnerability was found in the Solarflare (sfc) network driver. When reading RSS configuration via ethtool -x, the driver attempts to acquire the rss_lock that is already held by the networking core, causing a deadlock and system hang.
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Description OSIDB Bzimport 2026-02-14 17:03:12 UTC 
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.
Comment 1 Jon Moroney 2026-02-16 20:15:50 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026021419-CVE-2026-23165-3437@gregkh/T