VulnerabilityPublished 18 Oct 2026

CVE-2026-98738: Linux kernel · Bluetooth: Serialize SMP remote OOB data access

Source GCVE Database

Authoritative record:CVE-2026-98738

Not known to be exploited · fixed in df5162eeb10e69fe0c2349503882c4a09077f001 : patch Linux kernel soon.

Data as of 26 Oct 2026, 12:55 UTC

Severity

High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in df5162eeb10e69fe0c2349503882c4a09077f001, 889c61e3d0f1091a958e4b2a24b20bab23d915c4, 94afa17d6bfd5c1d367c56c8b63df5f695380861 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 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.

ghsa-pp83-8gx8-qvjg

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 02b05bd8b0a632e9a26795bced8f19ca6a5f7079, < df5162eeb10e69fe0c2349503882c4a09077f001	Fixed in df5162eeb10e69fe0c2349503882c4a09077f001
LinuxLinux	Affected ≥ 02b05bd8b0a632e9a26795bced8f19ca6a5f7079, < 889c61e3d0f1091a958e4b2a24b20bab23d915c4	Fixed in 889c61e3d0f1091a958e4b2a24b20bab23d915c4
LinuxLinux	Affected ≥ 02b05bd8b0a632e9a26795bced8f19ca6a5f7079, < 94afa17d6bfd5c1d367c56c8b63df5f695380861	Fixed in 94afa17d6bfd5c1d367c56c8b63df5f695380861
LinuxLinux	Affected ≥ 02b05bd8b0a632e9a26795bced8f19ca6a5f7079, < 81a2345f1984f0b36d3226571bc196316a01b648	Fixed in 81a2345f1984f0b36d3226571bc196316a01b648
LinuxLinux	Affected ≥ 02b05bd8b0a632e9a26795bced8f19ca6a5f7079, < 1e11412a1b9854a89d044576d616675b16141d87	Fixed in 1e11412a1b9854a89d044576d616675b16141d87
LinuxLinux	Affected =3.19	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to address this vulnerability by adding a dedicated mutex for remote OOB data access. Users should update to the patched kernel versions once available.

Description

A use-after-free vulnerability in the Linux kernel Bluetooth subsystem was resolved. The issue involved unsynchronized access to remote Out-Of-Band (OOB) data during SMP pairing commands, allowing concurrent removal of data while it was being read. This could lead to memory corruption or kernel crashes. The fix introduced a dedicated mutex to serialize access to remote OOB data without causing lock order inversions.

References

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