CVE-2026-74538: Bluetooth: ISO: lock sk in iso_connect_ind
Greg Kroah-Hartman <[email protected]>
| Newsgroups | org.kernel.vger.linux-cve-announce |
|---|---|
| Message-ID | <2026081548-CVE-2026-74538-85c1@gregkh> |
From: Greg Kroah-Hartman <[email protected]> Description =========== In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: lock sk in iso_connect_ind Accessing iso_pi(sk)->conn requires lock_sock, which is not taken in the "ev3" part of iso_connect_ind. It may also be NULL if socket has transitioned away from the LISTEN/CONNECT states before locking. Fix by adding lock/release. Recheck hcon is valid after lock acquire where needed. The Linux kernel CVE team has assigned CVE-2026-74538 to this issue. Affected and fixed versions =========================== Issue introduced in 6.9 with commit 168d9bf9c7f01df71e6404cfff66d9c2a8e968fb and fixed in 6.18.44 with commit e8e9cff6d80eeec28dec4cf7cc18662986945391 Issue introduced in 6.9 with commit 168d9bf9c7f01df71e6404cfff66d9c2a8e968fb and fixed in 7.1.8 with commit 9bee7e476534f27e830658dad962d85da9edf6bf Issue introduced in 6.9 with commit 168d9bf9c7f01df71e6404cfff66d9c2a8e968fb and fixed in 7.2-rc6 with commit 4311fd6f429065a8ba208660360a895627a00cf3 Issue introduced in 6.8.9 with commit 489efc9ae36f164423f5fa7ace772a7ab8131cd8 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-74538 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: net/bluetooth/iso.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/e8e9cff6d80eeec28dec4cf7cc18662986945391 https://git.kernel.org/stable/c/9bee7e476534f27e830658dad962d85da9edf6bf https://git.kernel.org/stable/c/4311fd6f429065a8ba208660360a895627a00cf3