VulnerabilityPublished 25 Sep 2026Updated 19 Oct 2026

CVE-2026-98110: Linux kernel · Bluetooth: btintel: bound firmware ID by TLV length

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in aef56a2bd5aa22808ce508605d7497d2b5e8eb5f : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in aef56a2bd5aa22808ce508605d7497d2b5e8eb5f, ac8aa9e0ec93a12a60230066f199f49c3b9aac3d, a07b3024a927892dd46e7dfbed438e8834e24098 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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 aef56a2bd5aa22808ce508605d7497d2b5e8eb5f, ac8aa9e0ec93a12a60230066f199f49c3b9aac3d, a07b3024a927892dd46e7dfbed438e8834e24098 or 058f56de5f48ba4b3be01526006ac83ce9e79f39.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 164c62f958f8c7f0bde1e9a5a8677971c6f28205, < aef56a2bd5aa22808ce508605d7497d2b5e8eb5f	Fixed in aef56a2bd5aa22808ce508605d7497d2b5e8eb5f
LinuxLinux	Affected ≥ 164c62f958f8c7f0bde1e9a5a8677971c6f28205, < ac8aa9e0ec93a12a60230066f199f49c3b9aac3d	Fixed in ac8aa9e0ec93a12a60230066f199f49c3b9aac3d
LinuxLinux	Affected ≥ 164c62f958f8c7f0bde1e9a5a8677971c6f28205, < a07b3024a927892dd46e7dfbed438e8834e24098	Fixed in a07b3024a927892dd46e7dfbed438e8834e24098
LinuxLinux	Affected ≥ 164c62f958f8c7f0bde1e9a5a8677971c6f28205, < 058f56de5f48ba4b3be01526006ac83ce9e79f39	Fixed in 058f56de5f48ba4b3be01526006ac83ce9e79f39
LinuxLinux	Affected =6.11	Fixed in–

AI-suggested

This vulnerability has been fixed in the Linux kernel. Users should update to a fixed kernel version containing the commits identified by hashes aef56a2bd5aa22808ce508605d7497d2b5e8eb5f, ac8aa9e0ec93a12a60230066f199f49c3b9aac3d, a07b3024a927892dd46e7dfbed438e8834e24098, and 058f56de5f48ba4b3be01526006ac83ce9e79f39. No additional mitigation is required beyond applying these official fixes.

Description

A vulnerability in the Linux kernel Bluetooth subsystem (btintel) involves improper handling of the firmware ID string. The firmware ID is expected to be NUL-terminated, but the code only uses the TLV length as a boundary, which can cause snprintf() to read beyond the intended buffer if no NUL terminator is present. This issue has been fixed by limiting the conversion to the advertised TLV value length.

Impact

The vulnerability can cause snprintf() to read beyond the buffer containing the firmware ID if it is not NUL-terminated, which may lead to information disclosure or memory corruption depending on usage context. No known exploits in the wild have been reported. The impact is limited to the Bluetooth subsystem in the Linux kernel version 6.11.

Summary

CVE-2026-98110 addresses a flaw in the Linux kernel's Bluetooth btintel driver where the firmware ID is treated as a NUL-terminated string despite only having the TLV length as a boundary. If the firmware ID lacks a NUL terminator, snprintf() may read beyond the buffer, potentially leading to out-of-bounds memory reads. The fix involves bounding the conversion strictly by the TLV length to prevent over-read.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 12:42 UTC

Technical details

References

Community reviews

Related threats