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CVE-2026-31499VulnerabilityPublished Updated

l2cap_conn_del() · Bluetooth: L2CAP: Fix deadlock

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-31499· Medium

Not known to be exploited · fixed in f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da : update Microsoft when convenient.

Data as of 10 Nov 2026, 23:24 UTC

Severity
Medium

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

Thin evidence

One scorer or none
CVSS scores by source
NVDCVSS 3.15.5
EPSS
0.09% chance of exploitation in 30 days – higher than 0% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da, d008460de352e534f6721de829b093368564ec66, 6.14 +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 11 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=6.12.20 <6.12.88
  • >=6.6.84 <6.7
  • >=6.13.8 <6.14
Fixed in
  • f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da
  • d008460de352e534f6721de829b093368564ec66
  • 6.14
  • 6.12.88
  • 6.7
  • 3f26ecbd9cde621dd94be7ef252c7210b965a5c7
  • 00fdebbbc557a2fc21321ff2eaa22fd70c078608
LinuxLinuxAffected
  • =6.14
Fixed in–

Description

CVE-2026-31499 is a vulnerability in Microsoft Bluetooth L2CAP component involving a deadlock issue in the l2cap_conn_del() function. This deadlock could potentially affect the stability of the Bluetooth connection handling. The affected version explicitly identified is version 3.0. No CVSS score is provided for this vulnerability.

References

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