VulnerabilityPublished 25 Mar 2026Updated 5 Nov 2026

CVE-2026-23299: Linux kernel · Bluetooth: purge error queues in socket destructors

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in 21e4271e65094172aadd5beb8caea95dd0fbf6d7 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 23:24 UTC

Severity

Unrated

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

Thin evidence

One scorer or none

EPSS

0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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, 2026-11-05.

Patch

Available – fixed in 21e4271e65094172aadd5beb8caea95dd0fbf6d7, 3de7c10a950b36affc692d8bd2ac713852580e56, 2b6c942a526635f5c61d2f000258e620da32d3a7

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Mar 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 5 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 Linux kernel to 21e4271e65094172aadd5beb8caea95dd0fbf6d7, 3de7c10a950b36affc692d8bd2ac713852580e56 or 2b6c942a526635f5c61d2f000258e620da32d3a7.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 134f4b39df7b77225a80ef585c15d46f964f5e6f, < 21e4271e65094172aadd5beb8caea95dd0fbf6d7	Fixed in 21e4271e65094172aadd5beb8caea95dd0fbf6d7
LinuxLinux	Affected ≥ 134f4b39df7b77225a80ef585c15d46f964f5e6f, < 3de7c10a950b36affc692d8bd2ac713852580e56	Fixed in 3de7c10a950b36affc692d8bd2ac713852580e56
LinuxLinux	Affected ≥ 134f4b39df7b77225a80ef585c15d46f964f5e6f, < 2b6c942a526635f5c61d2f000258e620da32d3a7	Fixed in 2b6c942a526635f5c61d2f000258e620da32d3a7
LinuxLinux	Affected =6.15	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: purge error queues in socket destructors When TX timestamping is enabled via SO_TIMESTAMPING, SKBs may be queued into sk_error_queue and will stay there until consumed. If userspace never gets to read the timestamps, or if the controller is removed unexpectedly, these SKBs will leak. Fix by adding skb_queue_purge() calls for sk_error_queue in affected bluetooth destructors. RFCOMM does not currently use sk_error_queue.

References

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