CVE-2026-74529: Bluetooth: hci_sync: hold conn in hci_connect_pa_sync() callback
Greg Kroah-Hartman <[email protected]>
| Newsgroups | org.kernel.vger.linux-cve-announce |
|---|---|
| Message-ID | <2026081546-CVE-2026-74529-1f0a@gregkh> |
From: Greg Kroah-Hartman <[email protected]> Description =========== In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold conn in hci_connect_pa_sync() callback There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that. The Linux kernel CVE team has assigned CVE-2026-74529 to this issue. Affected and fixed versions =========================== Issue introduced in 6.15 with commit 6d0417e4e1cf66fd917f06f0454958362714ef7d and fixed in 7.1.8 with commit c53c70ec289ee12f20c4f1b2fbfd151762c01f67 Issue introduced in 6.15 with commit 6d0417e4e1cf66fd917f06f0454958362714ef7d and fixed in 7.2-rc6 with commit 44fc74069d8988f2825246f9401218e29de2c0ab Issue introduced in 6.12.28 with commit eb8b860e87b296bd1874c79a668081efd00f9754 Issue introduced in 6.14.6 with commit 94bf6380e936339a700c0b3171a49baf512aa70b 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-2026-74529 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/hci_sync.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/c53c70ec289ee12f20c4f1b2fbfd151762c01f67 https://git.kernel.org/stable/c/44fc74069d8988f2825246f9401218e29de2c0ab