| 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-2025-37776: ksmbd: fix use-after-free in smb_break_all_levII_oplock() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: fix use-after-free in smb_break_all_levII_oplock() |
| |
| There is a room in smb_break_all_levII_oplock that can cause racy issues |
| when unlocking in the middle of the loop. This patch use read lock |
| to protect whole loop. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37776 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.6.88 with commit 296cb5457cc6f4a754c4ae29855f8a253d52bcc6 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.12.25 with commit d54ab1520d43e95f9b2e22d7a05fc9614192e5a5 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.14.4 with commit d73686367ad68534257cd88a36ca3c52cb8b81d8 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.15 with commit 18b4fac5ef17f77fed9417d22210ceafd6525fc7 |
| |
| 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-2025-37776 |
| 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/oplock.c |
| fs/smb/server/oplock.h |
| |
| |
| 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/296cb5457cc6f4a754c4ae29855f8a253d52bcc6 |
| https://git.kernel.org/stable/c/d54ab1520d43e95f9b2e22d7a05fc9614192e5a5 |
| https://git.kernel.org/stable/c/d73686367ad68534257cd88a36ca3c52cb8b81d8 |
| https://git.kernel.org/stable/c/18b4fac5ef17f77fed9417d22210ceafd6525fc7 |
