VulnerabilityPublished 25 Sep 2026Updated 19 Oct 2026

CVE-2026-97907: Linux kernel · Bluetooth: btrtl: Don't leak return code when parsing firmware format v2

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in c4249cf6e80b1bd62a6a409aaabe760fe025dac3 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Low

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in c4249cf6e80b1bd62a6a409aaabe760fe025dac3, ba96047bba4a6101267cf4f6b3057cbc58e6c554, 422f6547259654bae690713614c794dd1e2c0a0b +2

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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 9a24ce5e29b15c4c6b0c89c04f9df6ce14addefa, < c4249cf6e80b1bd62a6a409aaabe760fe025dac3	Fixed in c4249cf6e80b1bd62a6a409aaabe760fe025dac3
LinuxLinux	Affected ≥ 9a24ce5e29b15c4c6b0c89c04f9df6ce14addefa, < ba96047bba4a6101267cf4f6b3057cbc58e6c554	Fixed in ba96047bba4a6101267cf4f6b3057cbc58e6c554
LinuxLinux	Affected ≥ 9a24ce5e29b15c4c6b0c89c04f9df6ce14addefa, < 422f6547259654bae690713614c794dd1e2c0a0b	Fixed in 422f6547259654bae690713614c794dd1e2c0a0b
LinuxLinux	Affected ≥ 9a24ce5e29b15c4c6b0c89c04f9df6ce14addefa, < 90f3a142b5f8596a565b8e080d18a8050be6edef	Fixed in 90f3a142b5f8596a565b8e080d18a8050be6edef
LinuxLinux	Affected ≥ 9a24ce5e29b15c4c6b0c89c04f9df6ce14addefa, < 83e3e515fd261600ed8491fb0a8bcdfb115c904e	Fixed in 83e3e515fd261600ed8491fb0a8bcdfb115c904e
LinuxLinux	Affected =6.4	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel source code as indicated by the fixed commit versions. Users and administrators should update to the fixed Linux kernel versions containing the patches referenced by the commit hashes to remediate this issue.

Description

A vulnerability in the Linux kernel Bluetooth subsystem (btrtl) involves leaking an uninitialized return code when parsing firmware format version 2. This occurs when the key_id from the chip is zero, causing the function rtlbt_parse_firmware_v2() to improperly handle security headers and leak return codes from previous sections. The issue has been fixed by correcting the loop control flow to properly skip sections and improve code readability.

Impact

The vulnerability could lead to leakage of uninitialized or stale return codes during firmware parsing in the Bluetooth driver. While the description does not specify direct security consequences such as privilege escalation or denial of service, leaking internal return codes may aid an attacker in understanding internal state or debugging information, potentially assisting further attacks. No known exploits in the wild have been reported.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 13:36 UTC

Technical details

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