| 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-2024-26828: cifs: fix underflow in parse_server_interfaces() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| cifs: fix underflow in parse_server_interfaces() |
| |
| In this loop, we step through the buffer and after each item we check |
| if the size_left is greater than the minimum size we need. However, |
| the problem is that "bytes_left" is type ssize_t while sizeof() is type |
| size_t. That means that because of type promotion, the comparison is |
| done as an unsigned and if we have negative bytes left the loop |
| continues instead of ending. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26828 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.18 with commit fe856be475f7cf5ffcde57341d175ce9fd09434b and fixed in 6.1.79 with commit 7190353835b4a219abb70f90b06cdcae97f11512 |
| Issue introduced in 4.18 with commit fe856be475f7cf5ffcde57341d175ce9fd09434b and fixed in 6.6.18 with commit f7ff1c89fb6e9610d2b01c1821727729e6609308 |
| Issue introduced in 4.18 with commit fe856be475f7cf5ffcde57341d175ce9fd09434b and fixed in 6.7.6 with commit df2af9fdbc4ddde18a3371c4ca1a86596e8be301 |
| Issue introduced in 4.18 with commit fe856be475f7cf5ffcde57341d175ce9fd09434b and fixed in 6.8 with commit cffe487026be13eaf37ea28b783d9638ab147204 |
| |
| 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-2024-26828 |
| 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/client/smb2ops.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/7190353835b4a219abb70f90b06cdcae97f11512 |
| https://git.kernel.org/stable/c/f7ff1c89fb6e9610d2b01c1821727729e6609308 |
| https://git.kernel.org/stable/c/df2af9fdbc4ddde18a3371c4ca1a86596e8be301 |
| https://git.kernel.org/stable/c/cffe487026be13eaf37ea28b783d9638ab147204 |
