Bluetooth: ISO: hold sk properly in iso_conn_ready

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Summary

CVECVE-2026-74537
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:59 UTC
Updated2026-08-15 13:17:59 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: hold sk properly in iso_conn_ready sk deref in iso_conn_ready must be done either under conn->lock, or holding a refcount, to avoid concurrent close. conn->sk is currently accessed without either: [Task 1] [Task 2] iso_sock_release iso_conn_ready sk = conn->sk lock_sock(sk) conn->sk = NULL lock_sock(sk) release_sock(sk) iso_sock_kill(sk) UAF on sk deref Fix possible UAF by holding sk refcount in iso_conn_ready(). Also recheck after lock_sock that the socket is still valid. Adjust locking so conn->sk is cleared only under lock_sock.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 27c24fda62b601d6f9ca5e992502578c4310876f 4e9b5e8669b3602a4e01b6d1e9539b72e42c84d5 git Not specified
CNA Linux Linux affected 27c24fda62b601d6f9ca5e992502578c4310876f 1308d72903d792d10b82bc4ef08b8a4452308b04 git Not specified
CNA Linux Linux affected 27c24fda62b601d6f9ca5e992502578c4310876f 0d255e63fcf3f13a570d7ac11678fa1164ac015c git Not specified
CNA Linux Linux affected 5.15 Not specified
CNA Linux Linux unaffected 5.15 semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc6 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4e9b5e8669b3602a4e01b6d1e9539b72e42c84d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0d255e63fcf3f13a570d7ac11678fa1164ac015c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1308d72903d792d10b82bc4ef08b8a4452308b04 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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