VulnerabilityPublished 24 Apr 2026Updated 6 Nov 2026

CVE-2026-31634: Linux kernel · rxrpc: fix reference count leak in rxrpc_server_keyring()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in fc76d0bd00850b7372f0a4a319c0c60f80487632 : 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 fc76d0bd00850b7372f0a4a319c0c60f80487632, f125846ee79fcae537a964ce66494e96fa54a6de, c6d9ea26cf8756ad6f162578e94a5f82f6fae3c2 +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 ≥ 17926a79320afa9b95df6b977b40cca6d8713cea, < fc76d0bd00850b7372f0a4a319c0c60f80487632	Fixed in fc76d0bd00850b7372f0a4a319c0c60f80487632
LinuxLinux	Affected ≥ 17926a79320afa9b95df6b977b40cca6d8713cea, < f125846ee79fcae537a964ce66494e96fa54a6de	Fixed in f125846ee79fcae537a964ce66494e96fa54a6de
LinuxLinux	Affected ≥ 17926a79320afa9b95df6b977b40cca6d8713cea, < c6d9ea26cf8756ad6f162578e94a5f82f6fae3c2	Fixed in c6d9ea26cf8756ad6f162578e94a5f82f6fae3c2
LinuxLinux	Affected ≥ 17926a79320afa9b95df6b977b40cca6d8713cea, < 139c750bf06649097d98b0bc41e2a678b4627e27	Fixed in 139c750bf06649097d98b0bc41e2a678b4627e27
LinuxLinux	Affected ≥ 17926a79320afa9b95df6b977b40cca6d8713cea, < 45d9584e51bdd61faf1900f82666d4ea6a85da72	Fixed in 45d9584e51bdd61faf1900f82666d4ea6a85da72
LinuxLinux	Affected ≥ 17926a79320afa9b95df6b977b40cca6d8713cea, < 12de9e0e0b0b7058be7dfb8a5927eb565bc25780	Fixed in 12de9e0e0b0b7058be7dfb8a5927eb565bc25780

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: fix reference count leak in rxrpc_server_keyring() This patch fixes a reference count leak in rxrpc_server_keyring() by checking if rx->securities is already set.

References

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