VulnerabilityPublished 26 May 2026Updated 6 Nov 2026

CVE-2026-45835: Linux kernel · Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_connection_cb()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in bc3bb9f40da8e53896abc2d29c6d0c6686fe4ab9 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 15:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in bc3bb9f40da8e53896abc2d29c6d0c6686fe4ab9, ab77c8bc30269bee15d917059a66bea48909f5f0, 76083fb80f5a38ac13326b2d810f66bd07771eea +5

Exploitation evidence

Disclosed: evidence found.
CVE published 26 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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 ≥ 80808e431e1ef25856457de82ce141bed6a6313a, < bc3bb9f40da8e53896abc2d29c6d0c6686fe4ab9	Fixed in bc3bb9f40da8e53896abc2d29c6d0c6686fe4ab9
LinuxLinux	Affected ≥ 80808e431e1ef25856457de82ce141bed6a6313a, < ab77c8bc30269bee15d917059a66bea48909f5f0	Fixed in ab77c8bc30269bee15d917059a66bea48909f5f0
LinuxLinux	Affected ≥ 80808e431e1ef25856457de82ce141bed6a6313a, < 76083fb80f5a38ac13326b2d810f66bd07771eea	Fixed in 76083fb80f5a38ac13326b2d810f66bd07771eea
LinuxLinux	Affected ≥ 80808e431e1ef25856457de82ce141bed6a6313a, < 2422eaed0925973c0f318c94eb13e76f14c7381e	Fixed in 2422eaed0925973c0f318c94eb13e76f14c7381e
LinuxLinux	Affected ≥ 80808e431e1ef25856457de82ce141bed6a6313a, < 741e6024e31587b0c021b6616a9e428a4ea0b64a	Fixed in 741e6024e31587b0c021b6616a9e428a4ea0b64a
LinuxLinux	Affected ≥ 80808e431e1ef25856457de82ce141bed6a6313a, < 684a1f9ee2325437ae18ac5371884e4c6a25ae73	Fixed in 684a1f9ee2325437ae18ac5371884e4c6a25ae73

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_connection_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().

References

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