| From bippy-1.1.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-53137: ext4: Fix possible corruption when moving a directory |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ext4: Fix possible corruption when moving a directory |
| |
| When we are renaming a directory to a different directory, we need to |
| update '..' entry in the moved directory. However nothing prevents moved |
| directory from being modified and even converted from the inline format |
| to the normal format. When such race happens the rename code gets |
| confused and we crash. Fix the problem by locking the moved directory. |
| |
| The Linux kernel CVE team has assigned CVE-2023-53137 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.8 with commit 32f7f22c0b52e8189fef83986b16dc7abe95f2c4 and fixed in 5.4.237 with commit 8dac5a63cf79707b547ea3d425fead5f4482198f |
| Issue introduced in 3.8 with commit 32f7f22c0b52e8189fef83986b16dc7abe95f2c4 and fixed in 5.10.175 with commit 0c440f14558bfacd22c6935ae1fd4b2a09e96b5d |
| Issue introduced in 3.8 with commit 32f7f22c0b52e8189fef83986b16dc7abe95f2c4 and fixed in 5.15.103 with commit c50fc503ee1b97f12c98e26afc39fdaebebcf04f |
| Issue introduced in 3.8 with commit 32f7f22c0b52e8189fef83986b16dc7abe95f2c4 and fixed in 6.1.20 with commit b0bb13612292ca90fa4c2a7e425375649bc50d3e |
| Issue introduced in 3.8 with commit 32f7f22c0b52e8189fef83986b16dc7abe95f2c4 and fixed in 6.2.7 with commit 291cd19d107e197306869cb3237c1bba62d13182 |
| Issue introduced in 3.8 with commit 32f7f22c0b52e8189fef83986b16dc7abe95f2c4 and fixed in 6.3 with commit 0813299c586b175d7edb25f56412c54b812d0379 |
| |
| 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-2023-53137 |
| 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/ext4/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/8dac5a63cf79707b547ea3d425fead5f4482198f |
| https://git.kernel.org/stable/c/0c440f14558bfacd22c6935ae1fd4b2a09e96b5d |
| https://git.kernel.org/stable/c/c50fc503ee1b97f12c98e26afc39fdaebebcf04f |
| https://git.kernel.org/stable/c/b0bb13612292ca90fa4c2a7e425375649bc50d3e |
| https://git.kernel.org/stable/c/291cd19d107e197306869cb3237c1bba62d13182 |
| https://git.kernel.org/stable/c/0813299c586b175d7edb25f56412c54b812d0379 |
