| 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-2024-50285: ksmbd: check outstanding simultaneous SMB operations |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: check outstanding simultaneous SMB operations |
| |
| If Client send simultaneous SMB operations to ksmbd, It exhausts too much |
| memory through the "ksmbd_work_cache”. It will cause OOM issue. |
| ksmbd has a credit mechanism but it can't handle this problem. This patch |
| add the check if it exceeds max credits to prevent this problem by assuming |
| that one smb request consumes at least one credit. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50285 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.6.61 with commit 1f993777275cbd8f74765c4f9d9285cb907c9be5 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.11.8 with commit e257ac6fe138623cf59fca8898abdf659dbc8356 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.12 with commit 0a77d947f599b1f39065015bec99390d0c0022ee |
| |
| 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-2024-50285 |
| 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/server.c |
| fs/smb/server/smb_common.c |
| fs/smb/server/smb_common.h |
| |
| |
| 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/1f993777275cbd8f74765c4f9d9285cb907c9be5 |
| https://git.kernel.org/stable/c/e257ac6fe138623cf59fca8898abdf659dbc8356 |
| https://git.kernel.org/stable/c/0a77d947f599b1f39065015bec99390d0c0022ee |
