VulnerabilityPublished 6 May 2026Updated 6 Nov 2026

CVE-2026-43189: Linux kernel · media: v4l2-async: Fix error handling on steps after finding a match

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in b02bcb378efa8af07827f49b3afcc5e825318c55 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 15:50 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · 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 b02bcb378efa8af07827f49b3afcc5e825318c55, 461733d83e67ba7e3a5b750c0d203f738e01244f, 7345d6d356336c448d6b9230ed8704f39679fd12 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 6 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 ≥ 28a1295795d85a25f2e7dd391c43969e95fcb341, < b02bcb378efa8af07827f49b3afcc5e825318c55	Fixed in b02bcb378efa8af07827f49b3afcc5e825318c55
LinuxLinux	Affected ≥ 28a1295795d85a25f2e7dd391c43969e95fcb341, < 461733d83e67ba7e3a5b750c0d203f738e01244f	Fixed in 461733d83e67ba7e3a5b750c0d203f738e01244f
LinuxLinux	Affected ≥ 28a1295795d85a25f2e7dd391c43969e95fcb341, < 7345d6d356336c448d6b9230ed8704f39679fd12	Fixed in 7345d6d356336c448d6b9230ed8704f39679fd12
LinuxLinux	Affected ≥ 28a1295795d85a25f2e7dd391c43969e95fcb341, < 30aaed311f973f13ba13a0cd2dc0202f595fff48	Fixed in 30aaed311f973f13ba13a0cd2dc0202f595fff48
LinuxLinux	Affected ≥ 28a1295795d85a25f2e7dd391c43969e95fcb341, < 2de0a3c8148fc3dbea21981e6569f550b3626119	Fixed in 2de0a3c8148fc3dbea21981e6569f550b3626119
LinuxLinux	Affected =6.6	Fixed in–

AI-suggested

A fix is available and has been applied in the Linux kernel versions identified by the provided commit hashes. Users should update to these fixed versions to remediate the vulnerability.

Description

A vulnerability in the Linux kernel's media subsystem (v4l2-async) related to error handling after finding a matching async connection has been fixed. The issue involved improper handling of async connections during sub-device registration and notification, potentially leading to dereferencing of unset pointers on error paths.

Impact

The vulnerability could cause improper error handling in the v4l2-async subsystem, potentially leading to kernel instability or crashes due to dereferencing of uninitialized pointers during async connection processing. There is no indication of remote code execution or privilege escalation from the provided data.

Summary

The Linux kernel's media: v4l2-async component had a flaw in error handling after matching an async connection with an fwnode. Specifically, if v4l2_async_match_notify() failed before handling sub-notifiers, the async connection was unbound and removed from the sub-device's connection list twice. Additionally, the async connection's 'sd' field was set only after creating ancillary links but was dereferenced earlier in error handling, risking invalid memory access. This vulnerability was addressed by correcting the order and conditions of these operations to prevent improper unbinding and pointer dereferencing.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Nov 2026, 15:50 UTC

Technical details

References

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