| 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-2024-26936: ksmbd: validate request buffer size in smb2_allocate_rsp_buf() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: validate request buffer size in smb2_allocate_rsp_buf() |
| |
| The response buffer should be allocated in smb2_allocate_rsp_buf |
| before validating request. But the fields in payload as well as smb2 header |
| is used in smb2_allocate_rsp_buf(). This patch add simple buffer size |
| validation to avoid potencial out-of-bounds in request buffer. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26936 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 5.15.159 with commit 8f3d0bf1d0c62b539d54c5b9108a845cff619b99 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.1.88 with commit 21ff9d7d223c5c19cb4334009e4c0c83a2f4d674 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.6.29 with commit 5c20b242d4fed73a93591e48bfd9772e2322fb11 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.8.8 with commit 2c27a64a2bc47d9bfc7c3cf8be14be53b1ee7cb6 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.9 with commit 17cf0c2794bdb6f39671265aa18aea5c22ee8c4a |
| |
| 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-2024-26936 |
| 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/8f3d0bf1d0c62b539d54c5b9108a845cff619b99 |
| https://git.kernel.org/stable/c/21ff9d7d223c5c19cb4334009e4c0c83a2f4d674 |
| https://git.kernel.org/stable/c/5c20b242d4fed73a93591e48bfd9772e2322fb11 |
| https://git.kernel.org/stable/c/2c27a64a2bc47d9bfc7c3cf8be14be53b1ee7cb6 |
| https://git.kernel.org/stable/c/17cf0c2794bdb6f39671265aa18aea5c22ee8c4a |
