Bluetooth: ISO: balance the parent hold in hci_bind_bis()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98459
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:16:56 UTC
Updated2026-10-19 10:18:55 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: balance the parent hold in hci_bind_bis() hci_conn_link() takes a lifetime reference to its parent with hci_conn_get(), but only takes an operational hold on the child. hci_conn_unlink() later balances both a hold and a reference on the parent. The SCO and CIS paths pass a parent acquired from a connect helper, so it already has a hold. For an additional BIS, hci_bind_bis() obtains the parent from hci_conn_hash_lookup_big(), which returns a bare pointer. Unlinking the child then drops the parent's existing hold and can schedule it for disconnection while its socket is still using it. Take a hold on the parent before linking it and drop that hold if linking fails. A successful link transfers the hold to hci_conn_unlink().

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 11dc486ed5d4626e6b92a23b67ed76cb6c48bfc9 ff28e6c67143c76ef50c3eac01f2fad411705f71 git Not specified
CNA Linux Linux affected fa224d0c094a458e9ebf5ea9b1c696136b7af427 03a91cdf6862fb351a74f035ad21e70112438552 git Not specified
CNA Linux Linux affected fa224d0c094a458e9ebf5ea9b1c696136b7af427 4e49206d9574a4c109480198e73aea34ad0ed7f6 git Not specified
CNA Linux Linux affected fa224d0c094a458e9ebf5ea9b1c696136b7af427 bbcd723ee7a84bc868142fd57717af88e54e555a git Not specified
CNA Linux Linux affected fa224d0c094a458e9ebf5ea9b1c696136b7af427 4c94557dd02569efa6c1072a0439addaef9a5224 git Not specified
CNA Linux Linux affected 6.6.67 6.6.158 semver Not specified
CNA Linux Linux affected 6.8 Not specified
CNA Linux Linux unaffected 6.8 semver Not specified
CNA Linux Linux unaffected 6.6.158 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.112 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.55 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.9 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4c94557dd02569efa6c1072a0439addaef9a5224 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/03a91cdf6862fb351a74f035ad21e70112438552 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bbcd723ee7a84bc868142fd57717af88e54e555a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ff28e6c67143c76ef50c3eac01f2fad411705f71 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4e49206d9574a4c109480198e73aea34ad0ed7f6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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