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CVE-2026-98457VulnerabilityPublished Updated

Microsoft · Bluetooth: L2CAP: validate frame length before control and FCS access

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-98457· Medium

Not known to be exploited · fixed in f557274af7b94b6134692e6f26b880f1e34c15bf : update Microsoft when convenient.

Data as of 2 Nov 2026, 10:58 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in f557274af7b94b6134692e6f26b880f1e34c15bf, c6a288e6001bcce16553c3853e0f5a45eaaf85c7, 4373ba79a267947e771c438507f7b103e30bdb21 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 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 2 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a, < f557274af7b94b6134692e6f26b880f1e34c15bf
Fixed in
  • f557274af7b94b6134692e6f26b880f1e34c15bf
LinuxLinuxAffected
  • ≥ 1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a, < c6a288e6001bcce16553c3853e0f5a45eaaf85c7
Fixed in
  • c6a288e6001bcce16553c3853e0f5a45eaaf85c7
LinuxLinuxAffected
  • ≥ 1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a, < 4373ba79a267947e771c438507f7b103e30bdb21
Fixed in
  • 4373ba79a267947e771c438507f7b103e30bdb21
LinuxLinuxAffected
  • ≥ 1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a, < 965bd88ed4b4763cb765dd65885adcfa588c6b14
Fixed in
  • 965bd88ed4b4763cb765dd65885adcfa588c6b14
LinuxLinuxAffected
  • ≥ 1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a, < 8c7556c7cd17e073bbefdc4a9a4694a207544c37
Fixed in
  • 8c7556c7cd17e073bbefdc4a9a4694a207544c37
LinuxLinuxAffected
  • ≥ 1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a, < 6c78a213d9070b610c7f418af2c25b66180b7e37
Fixed in
  • 6c78a213d9070b610c7f418af2c25b66180b7e37

Description

This vulnerability involves the Bluetooth L2CAP protocol where frame length validation is insufficient before accessing control and Frame Check Sequence (FCS) fields. It affects Microsoft products version 3.0 and 4.0. No CVSS score or detailed impact information is provided, and no known exploits are reported in the wild.

References

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