VulnerabilityPublished 24 Apr 2026Updated 6 Nov 2026

CVE-2026-31642: Linux kernel · rxrpc: Fix call removal to use RCU safe deletion

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c63abf25203b50243fe228090526f9dbf37727bd : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:04 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in c63abf25203b50243fe228090526f9dbf37727bd, b15b1ce96777b88989a6a4de8d01efbcd81ad2d7, ac5f54691be06a32246179d41be2d73598036deb +5

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 2baec2c3f854d1f79c7bb28386484e144e864a14, < c63abf25203b50243fe228090526f9dbf37727bd	Fixed in c63abf25203b50243fe228090526f9dbf37727bd
LinuxLinux	Affected ≥ 2baec2c3f854d1f79c7bb28386484e144e864a14, < b15b1ce96777b88989a6a4de8d01efbcd81ad2d7	Fixed in b15b1ce96777b88989a6a4de8d01efbcd81ad2d7
LinuxLinux	Affected ≥ 2baec2c3f854d1f79c7bb28386484e144e864a14, < ac5f54691be06a32246179d41be2d73598036deb	Fixed in ac5f54691be06a32246179d41be2d73598036deb
LinuxLinux	Affected ≥ 2baec2c3f854d1f79c7bb28386484e144e864a14, < 280efb85e9759881a9d31d0874baa04583cb6c09	Fixed in 280efb85e9759881a9d31d0874baa04583cb6c09
LinuxLinux	Affected ≥ 2baec2c3f854d1f79c7bb28386484e144e864a14, < 146d4ab94cf129ee06cd467cb5c71368a6b5bad6	Fixed in 146d4ab94cf129ee06cd467cb5c71368a6b5bad6
LinuxLinux	Affected ≥ 2baec2c3f854d1f79c7bb28386484e144e864a14, < 93fc15be44a35b8e3c58d0238ac0d9b7c53465ff	Fixed in 93fc15be44a35b8e3c58d0238ac0d9b7c53465ff

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix call removal to use RCU safe deletion Fix rxrpc call removal from the rxnet->calls list to use list_del_rcu() rather than list_del_init() to prevent stuffing up reading /proc/net/rxrpc/calls from potentially getting into an infinite loop. This, however, means that list_empty() no longer works on an entry that's been deleted from the list, making it harder to detect prior deletion. Fix this by: Firstly, make rxrpc_destroy_all_calls() only dump the first ten calls that are unexpectedly still on the list. Limiting the number of steps means there's no need to call cond_resched() or to remove calls from the list here, thereby eliminating the need for rxrpc_put_call() to check for that. rxrpc_put_call() can then be fixed to unconditionally delete the call from the list as it is the only place that the deletion occurs.

References

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