| 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-2025-22038: ksmbd: validate zero num_subauth before sub_auth is accessed |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: validate zero num_subauth before sub_auth is accessed |
| |
| Access psid->sub_auth[psid->num_subauth - 1] without checking |
| if num_subauth is non-zero leads to an out-of-bounds read. |
| This patch adds a validation step to ensure num_subauth != 0 |
| before sub_auth is accessed. |
| |
| The Linux kernel CVE team has assigned CVE-2025-22038 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.1.134 with commit 3ac65de111c686c95316ade660f8ba7aea3cd3cc |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.6.87 with commit 0e36a3e080d6d8bd7a34e089345d043da4ac8283 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.12.23 with commit 56de7778a48560278c334077ace7b9ac4bfb2fd1 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.13.11 with commit 68c6c3142bfcdb049839d40a9a59ebe8ea865002 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.14.2 with commit c8bfe1954a0b89e7b29b3a3e7f4c5e0ebd295e20 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.15 with commit bf21e29d78cd2c2371023953d9c82dfef82ebb36 |
| |
| 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-2025-22038 |
| 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/smbacl.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/3ac65de111c686c95316ade660f8ba7aea3cd3cc |
| https://git.kernel.org/stable/c/0e36a3e080d6d8bd7a34e089345d043da4ac8283 |
| https://git.kernel.org/stable/c/56de7778a48560278c334077ace7b9ac4bfb2fd1 |
| https://git.kernel.org/stable/c/68c6c3142bfcdb049839d40a9a59ebe8ea865002 |
| https://git.kernel.org/stable/c/c8bfe1954a0b89e7b29b3a3e7f4c5e0ebd295e20 |
| https://git.kernel.org/stable/c/bf21e29d78cd2c2371023953d9c82dfef82ebb36 |
