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CVE-2026-99009VulnerabilityPublished Updated

Microsoft · Bluetooth: RFCOMM: connect the session socket without rfcomm_mutex

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99009· Medium

Not known to be exploited · fixed in f492de11b325446b0b11bc2eb86e1f546eaa61b6 : update Microsoft when convenient.

Data as of 7 Nov 2026, 13:34 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in f492de11b325446b0b11bc2eb86e1f546eaa61b6, d2206e8c78be69d21d4f5343c3e99fbaeef41cbb, d7a3bf6f55ab77d465206b25fe3418091c3d4b92 +12

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Oct 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 7 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ fbf7961964a6e93360179f64712320ae9a1e9577, < f492de11b325446b0b11bc2eb86e1f546eaa61b6
Fixed in
  • f492de11b325446b0b11bc2eb86e1f546eaa61b6
LinuxLinuxAffected
  • ≥ 1b7841ffad08e911e8c4b9470f3fa08423568940, < d2206e8c78be69d21d4f5343c3e99fbaeef41cbb
Fixed in
  • d2206e8c78be69d21d4f5343c3e99fbaeef41cbb
LinuxLinuxAffected
  • ≥ 62ce8b33eb238cf18c15207332fbdc26d858f592, < d7a3bf6f55ab77d465206b25fe3418091c3d4b92
Fixed in
  • d7a3bf6f55ab77d465206b25fe3418091c3d4b92
LinuxLinuxAffected
  • ≥ 946d76db77ee5f922968ce558629ae47b381e3fc, < cc7732b8549ecb6f02457edeb8db1f6d255e381c
Fixed in
  • cc7732b8549ecb6f02457edeb8db1f6d255e381c
LinuxLinuxAffected
  • ≥ 7ded3264106418c6456ccceaafd9fda596ce12c3, < caf78390f78a005d5cdc1db2eb467b2794bbf020
Fixed in
  • caf78390f78a005d5cdc1db2eb467b2794bbf020
LinuxLinuxAffected
  • ≥ 759c185d0bbdb131357408f50b8735e04ed3caff, < ac022970e9fb0a5f7e7d1f6c8e104c1ed924dd1c
Fixed in
  • ac022970e9fb0a5f7e7d1f6c8e104c1ed924dd1c

Description

A vulnerability in the Bluetooth RFCOMM implementation involves connecting the session socket without proper synchronization using rfcomm_mutex. This issue affects Microsoft products versions 3.0 and 4.0. No CVSS score or detailed impact information is provided.

References

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