| 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-2025-37947: ksmbd: prevent out-of-bounds stream writes by validating *pos |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: prevent out-of-bounds stream writes by validating *pos |
| |
| ksmbd_vfs_stream_write() did not validate whether the write offset |
| (*pos) was within the bounds of the existing stream data length (v_len). |
| If *pos was greater than or equal to v_len, this could lead to an |
| out-of-bounds memory write. |
| |
| This patch adds a check to ensure *pos is less than v_len before |
| proceeding. If the condition fails, -EINVAL is returned. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37947 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.1.139 with commit 7f61da79df86fd140c7768e668ad846bfa7ec8e1 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.6.91 with commit 04c8a38c60346bb5a7c49b276de7233f703ce9cb |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.12.29 with commit d62ba16563a86aae052f96d270b3b6f78fca154c |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.14.7 with commit e6356499fd216ed6343ae0363f4c9303f02c5034 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.15 with commit 0ca6df4f40cf4c32487944aaf48319cb6c25accc |
| |
| 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-2025-37947 |
| 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/7f61da79df86fd140c7768e668ad846bfa7ec8e1 |
| https://git.kernel.org/stable/c/04c8a38c60346bb5a7c49b276de7233f703ce9cb |
| https://git.kernel.org/stable/c/d62ba16563a86aae052f96d270b3b6f78fca154c |
| https://git.kernel.org/stable/c/e6356499fd216ed6343ae0363f4c9303f02c5034 |
| https://git.kernel.org/stable/c/0ca6df4f40cf4c32487944aaf48319cb6c25accc |
