| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-21660: ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked |
| |
| When `ksmbd_vfs_kern_path_locked` met an error and it is not the last |
| entry, it will exit without restoring changed path buffer. But later this |
| buffer may be used as the filename for creation. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21660 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1.113 with commit d1b2d2a9c912fc7b788985fbaf944e80f4b3f2af and fixed in 6.1.125 with commit 13e41c58c74baa71f34c0830eaa3c29d53a6e964 |
| Issue introduced in 6.6.54 with commit 6ab95e27b77730de3fa2d601db3764490c5eede2 and fixed in 6.6.72 with commit 65b31b9d992c0fb0685c51a0cf09993832734fc4 |
| Issue introduced in 6.12 with commit c5a709f08d40b1a082e44ffcde1aea4d2822ddd5 and fixed in 6.12.10 with commit 51669f4af5f7959565b48e55691ba92fabf5c587 |
| Issue introduced in 6.12 with commit c5a709f08d40b1a082e44ffcde1aea4d2822ddd5 and fixed in 6.13 with commit 2ac538e40278a2c0c051cca81bcaafc547d61372 |
| Issue introduced in 6.10.13 with commit d205cb1a13b37b2660df70a972dedc8c4ba1c2e8 |
| Issue introduced in 6.11.2 with commit c1e27b70e79050530c671b9dab688386c86f039a |
| |
| 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-2025-21660 |
| 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/vfs.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/13e41c58c74baa71f34c0830eaa3c29d53a6e964 |
| https://git.kernel.org/stable/c/65b31b9d992c0fb0685c51a0cf09993832734fc4 |
| https://git.kernel.org/stable/c/51669f4af5f7959565b48e55691ba92fabf5c587 |
| https://git.kernel.org/stable/c/2ac538e40278a2c0c051cca81bcaafc547d61372 |
