Bluetooth: ISO: drop ISO_END frames received without prior ISO_START

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Summary

CVECVE-2026-64128
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:54 UTC
Updated2026-07-19 16:17:54 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: drop ISO_END frames received without prior ISO_START ISO data PDUs carry a packet-boundary flag indicating START, CONT, END or SINGLE. The ISO_CONT branch of iso_recv() guards against a missing ISO_START by checking conn->rx_len before touching conn->rx_skb, but ISO_END does not. If a peer sends an ISO_END as the first packet on a fresh ISO connection, conn->rx_skb is still NULL and conn->rx_len is zero, so skb_put(conn->rx_skb, ...) dereferences NULL and oopses. For BIS, where receivers sync to a broadcaster without pairing, any broadcaster on the air can trigger this. Mirror the ISO_CONT check at the top of ISO_END so a stray end fragment is logged and dropped instead of crashing the host.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ccf74f2390d60a2f9a75ef496d2564abb478f46a 1c3d1e1696b72579b970e17999c503a14535205b git Not specified
CNA Linux Linux affected ccf74f2390d60a2f9a75ef496d2564abb478f46a 3af41ee7ebecb0d5c8a504861f6cfad31345310f git Not specified
CNA Linux Linux affected ccf74f2390d60a2f9a75ef496d2564abb478f46a 39f4a82e80c8f5ed2d6952d73fbafc895721a728 git Not specified
CNA Linux Linux affected ccf74f2390d60a2f9a75ef496d2564abb478f46a 61f2410a96dee808029e2ae4d6ef2dd635f3477f git Not specified
CNA Linux Linux affected ccf74f2390d60a2f9a75ef496d2564abb478f46a e3a799881c12d27596232636a607e2e3fa448d63 git Not specified
CNA Linux Linux affected ccf74f2390d60a2f9a75ef496d2564abb478f46a 84c24fb151fc1179355296d7ff29129ac7c42129 git Not specified
CNA Linux Linux affected 6.0 Not specified
CNA Linux Linux unaffected 6.0 semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.142 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.92 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/61f2410a96dee808029e2ae4d6ef2dd635f3477f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3af41ee7ebecb0d5c8a504861f6cfad31345310f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/39f4a82e80c8f5ed2d6952d73fbafc895721a728 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/84c24fb151fc1179355296d7ff29129ac7c42129 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1c3d1e1696b72579b970e17999c503a14535205b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e3a799881c12d27596232636a607e2e3fa448d63 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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