VulnerabilityPublished 26 May 2026Updated 6 Nov 2026

CVE-2026-45834: Linux kernel · Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c88c185ae0a1067823661b220aeea613df2c127b : 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 c88c185ae0a1067823661b220aeea613df2c127b, a2dcf1a61d056aef15b63c6eae9441344d624389, 85426e97dc72f2088ba6d27e74cd58c3fbd43e31 +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 ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < c88c185ae0a1067823661b220aeea613df2c127b	Fixed in c88c185ae0a1067823661b220aeea613df2c127b
LinuxLinux	Affected ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < a2dcf1a61d056aef15b63c6eae9441344d624389	Fixed in a2dcf1a61d056aef15b63c6eae9441344d624389
LinuxLinux	Affected ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < 85426e97dc72f2088ba6d27e74cd58c3fbd43e31	Fixed in 85426e97dc72f2088ba6d27e74cd58c3fbd43e31
LinuxLinux	Affected ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < 5105f3e6b2df619c635b5f6a49fac131a36c7952	Fixed in 5105f3e6b2df619c635b5f6a49fac131a36c7952
LinuxLinux	Affected ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < 1810e42ff6716f320c7269d5850eca48b07b7427	Fixed in 1810e42ff6716f320c7269d5850eca48b07b7427
LinuxLinux	Affected ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < 2ff1a41a912de8517b4482e946dd951b7d80edbf	Fixed in 2ff1a41a912de8517b4482e946dd951b7d80edbf

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().

References

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