media: v4l2-async: Fix error handling on steps after finding a match

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Summary

CVECVE-2026-43189
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 12:16:37 UTC
Updated2026-05-11 20:47:45 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: media: v4l2-async: Fix error handling on steps after finding a match Once an async connection is found to be matching with an fwnode, a sub-device may be registered (in case it wasn't already), its bound operation is called, ancillary links are created, the async connection is added to the sub-device's list of connections and removed from the global waiting connection list. Further on, the sub-device's possible own notifier is searched for possible additional matches. Fix these specific issues: - If v4l2_async_match_notify() failed before the sub-notifier handling, the async connection was unbound and its entry removed from the sub-device's async connection list. The latter part was also done in v4l2_async_match_notify(). - The async connection's sd field was only set after creating ancillary links in v4l2_async_match_notify(). It was however dereferenced in v4l2_async_unbind_subdev_one(), which was called on error path of v4l2_async_match_notify() failure.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 28a1295795d85a25f2e7dd391c43969e95fcb341 30aaed311f973f13ba13a0cd2dc0202f595fff48 git Not specified
CNA Linux Linux affected 28a1295795d85a25f2e7dd391c43969e95fcb341 461733d83e67ba7e3a5b750c0d203f738e01244f git Not specified
CNA Linux Linux affected 28a1295795d85a25f2e7dd391c43969e95fcb341 b02bcb378efa8af07827f49b3afcc5e825318c55 git Not specified
CNA Linux Linux affected 28a1295795d85a25f2e7dd391c43969e95fcb341 2de0a3c8148fc3dbea21981e6569f550b3626119 git Not specified
CNA Linux Linux affected 28a1295795d85a25f2e7dd391c43969e95fcb341 7345d6d356336c448d6b9230ed8704f39679fd12 git Not specified
CNA Linux Linux affected 6.6 Not specified
CNA Linux Linux unaffected 6.6 semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/30aaed311f973f13ba13a0cd2dc0202f595fff48 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2de0a3c8148fc3dbea21981e6569f550b3626119 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b02bcb378efa8af07827f49b3afcc5e825318c55 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/7345d6d356336c448d6b9230ed8704f39679fd12 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/461733d83e67ba7e3a5b750c0d203f738e01244f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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