| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-22041: ksmbd: fix use-after-free in ksmbd_sessions_deregister() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: fix use-after-free in ksmbd_sessions_deregister() |
| |
| In multichannel mode, UAF issue can occur in session_deregister |
| when the second channel sets up a session through the connection of |
| the first channel. session that is freed through the global session |
| table can be accessed again through ->sessions of connection. |
| |
| The Linux kernel CVE team has assigned CVE-2025-22041 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.1.134 with commit f0eb3f575138b816da74697bd506682574742fcd |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.6.87 with commit a8a8ae303a8395cbac270b5b404d85df6ec788f8 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.12.23 with commit ca042cc0e4f9e0d2c8f86dd67e4b22f30a516a9b |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.13.11 with commit 8ed0e9d2f410f63525afb8351181eea36c80bcf1 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.14.2 with commit 33cc29e221df7a3085ae413e8c26c4e81a151153 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.15 with commit 15a9605f8d69dc85005b1a00c31a050b8625e1aa |
| |
| 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-2025-22041 |
| 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: |
| fs/smb/server/mgmt/user_session.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/f0eb3f575138b816da74697bd506682574742fcd |
| https://git.kernel.org/stable/c/a8a8ae303a8395cbac270b5b404d85df6ec788f8 |
| https://git.kernel.org/stable/c/ca042cc0e4f9e0d2c8f86dd67e4b22f30a516a9b |
| https://git.kernel.org/stable/c/8ed0e9d2f410f63525afb8351181eea36c80bcf1 |
| https://git.kernel.org/stable/c/33cc29e221df7a3085ae413e8c26c4e81a151153 |
| https://git.kernel.org/stable/c/15a9605f8d69dc85005b1a00c31a050b8625e1aa |
