| 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-2024-53147: exfat: fix out-of-bounds access of directory entries |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| exfat: fix out-of-bounds access of directory entries |
| |
| In the case of the directory size is greater than or equal to |
| the cluster size, if start_clu becomes an EOF cluster(an invalid |
| cluster) due to file system corruption, then the directory entry |
| where ei->hint_femp.eidx hint is outside the directory, resulting |
| in an out-of-bounds access, which may cause further file system |
| corruption. |
| |
| This commit adds a check for start_clu, if it is an invalid cluster, |
| the file or directory will be treated as empty. |
| |
| The Linux kernel CVE team has assigned CVE-2024-53147 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.7 with commit 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 and fixed in 6.11.11 with commit a0120d6463368378539ef928cf067d02372efb8c |
| Issue introduced in 5.7 with commit 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 and fixed in 6.12.2 with commit 3ddd1cb2b458ff6a193bc845f408dfff217db29e |
| Issue introduced in 5.7 with commit 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 and fixed in 6.13 with commit 184fa506e392eb78364d9283c961217ff2c0617b |
| |
| 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-2024-53147 |
| 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/exfat/namei.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/a0120d6463368378539ef928cf067d02372efb8c |
| https://git.kernel.org/stable/c/3ddd1cb2b458ff6a193bc845f408dfff217db29e |
| https://git.kernel.org/stable/c/184fa506e392eb78364d9283c961217ff2c0617b |
