| From bippy-7c5fe7eed585 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-2025-21945: ksmbd: fix use-after-free in smb2_lock |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: fix use-after-free in smb2_lock |
| |
| If smb_lock->zero_len has value, ->llist of smb_lock is not delete and |
| flock is old one. It will cause use-after-free on error handling |
| routine. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21945 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.1.131 with commit 410ce35a2ed6d0e114132bba29af49b69880c8c7 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.6.83 with commit 8573571060ca466cbef2c6f03306b2cc7b883506 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.12.19 with commit a0609097fd10d618aed4864038393dd75131289e |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.13.7 with commit 636e021646cf9b52ddfea7c809b018e91f2188cb |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.14 with commit 84d2d1641b71dec326e8736a749b7ee76a9599fc |
| |
| 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-2025-21945 |
| 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/smb2pdu.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/410ce35a2ed6d0e114132bba29af49b69880c8c7 |
| https://git.kernel.org/stable/c/8573571060ca466cbef2c6f03306b2cc7b883506 |
| https://git.kernel.org/stable/c/a0609097fd10d618aed4864038393dd75131289e |
| https://git.kernel.org/stable/c/636e021646cf9b52ddfea7c809b018e91f2188cb |
| https://git.kernel.org/stable/c/84d2d1641b71dec326e8736a749b7ee76a9599fc |
