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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-98459

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

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In 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().

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 11dc486ed5d4626e6b92a23b67ed76cb6c48bfc9 to < ff28e6c67143c76ef50c3eac01f2fad411705f71affected
  • fa224d0c094a458e9ebf5ea9b1c696136b7af427 to < 03a91cdf6862fb351a74f035ad21e70112438552affected
  • fa224d0c094a458e9ebf5ea9b1c696136b7af427 to < 4e49206d9574a4c109480198e73aea34ad0ed7f6affected
  • fa224d0c094a458e9ebf5ea9b1c696136b7af427 to < bbcd723ee7a84bc868142fd57717af88e54e555aaffected
  • fa224d0c094a458e9ebf5ea9b1c696136b7af427 to < 4c94557dd02569efa6c1072a0439addaef9a5224affected
  • 6.6.67 to < 6.6.158affected

Linux Linux

Default version status: affected

  • 6.8affected
  • 0 to < 6.8unaffected
  • 6.6.158 to ≤ 6.6.*unaffected
  • 6.12.112 to ≤ 6.12.*unaffected
  • 6.18.55 to ≤ 6.18.*unaffected
  • 7.2.9 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References