ALSA: caiaq: Handle probe errors properly

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Summary

CVECVE-2026-46004
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:18 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: Handle probe errors properly The probe procedure of setup_card() in caiaq driver doesn't treat the error cases gracefully, e.g. the error from snd_card_register() calls snd_card_free() but continues. This would lead to a UAF for the further calls like snd_usb_caiaq_control_init(), as Berk suggested in another patch in the link below. However, the problem is not only that; in general, this function drops the all error handlings (as it's a void function) although its caller can propagate an error to snd_probe(), which eventually calls snd_card_free() as a proper error path. That said, we should treat each error case in setup_card(), and just return the error code promptly, which is then handled later as a fatal error in snd_probe(). This patch achieves it by changing the setup_card() to return an error code. Also, the superfluous snd_card_free() call is removed, too. Note that card->private_free can be set still safely at returning an error. All called functions in card_free() have checks of the unassigned resources or NULL checks.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 f537e3ad69609f6924a4db6b4a7f6561f5288bdd git Not specified
CNA Linux Linux affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 6251e3e256337a30160ef59ab1580dde4d1acd28 git Not specified
CNA Linux Linux affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056 git Not specified
CNA Linux Linux affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 096dd8519cf2f768e9e14f224b627f7aaee1a9c5 git Not specified
CNA Linux Linux affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 28abd224db4a49560b452115bca3672a20e45b2f git Not specified
CNA Linux Linux affected 2.6.25 Not specified
CNA Linux Linux unaffected 2.6.25 semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.86 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6251e3e256337a30160ef59ab1580dde4d1acd28 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f537e3ad69609f6924a4db6b4a7f6561f5288bdd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/096dd8519cf2f768e9e14f224b627f7aaee1a9c5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/28abd224db4a49560b452115bca3672a20e45b2f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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