| 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-2024-49988: ksmbd: add refcnt to ksmbd_conn struct |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: add refcnt to ksmbd_conn struct |
| |
| When sending an oplock break request, opinfo->conn is used, |
| But freed ->conn can be used on multichannel. |
| This patch add a reference count to the ksmbd_conn struct |
| so that it can be freed when it is no longer used. |
| |
| The Linux kernel CVE team has assigned CVE-2024-49988 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.6.55 with commit 18f06bacc197d4ac9b518ad1c69999bc3d83e7aa |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.10.14 with commit 9fd3cde4628bcd3549ab95061f2bab74d2ed4f3b |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.11.3 with commit e9dac92f4482a382e8c0fe1bc243da5fc3526b0c |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.12 with commit ee426bfb9d09b29987369b897fe9b6485ac2be27 |
| |
| 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-2024-49988 |
| 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/connection.c |
| fs/smb/server/connection.h |
| fs/smb/server/oplock.c |
| fs/smb/server/vfs_cache.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/18f06bacc197d4ac9b518ad1c69999bc3d83e7aa |
| https://git.kernel.org/stable/c/9fd3cde4628bcd3549ab95061f2bab74d2ed4f3b |
| https://git.kernel.org/stable/c/e9dac92f4482a382e8c0fe1bc243da5fc3526b0c |
| https://git.kernel.org/stable/c/ee426bfb9d09b29987369b897fe9b6485ac2be27 |
