| 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-2024-46780: nilfs2: protect references to superblock parameters exposed in sysfs |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nilfs2: protect references to superblock parameters exposed in sysfs |
| |
| The superblock buffers of nilfs2 can not only be overwritten at runtime |
| for modifications/repairs, but they are also regularly swapped, replaced |
| during resizing, and even abandoned when degrading to one side due to |
| backing device issues. So, accessing them requires mutual exclusion using |
| the reader/writer semaphore "nilfs->ns_sem". |
| |
| Some sysfs attribute show methods read this superblock buffer without the |
| necessary mutual exclusion, which can cause problems with pointer |
| dereferencing and memory access, so fix it. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46780 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.17 with commit da7141fb78db915680616e15677539fc8140cf53 and fixed in 4.19.322 with commit b90beafac05931cbfcb6b1bd4f67c1923f47040e |
| Issue introduced in 3.17 with commit da7141fb78db915680616e15677539fc8140cf53 and fixed in 5.4.284 with commit ba97ba173f9625d5f34a986088979eae8b80d38e |
| Issue introduced in 3.17 with commit da7141fb78db915680616e15677539fc8140cf53 and fixed in 5.10.226 with commit 157c0d94b4c40887329418c70ef4edd1a8d6b4ed |
| Issue introduced in 3.17 with commit da7141fb78db915680616e15677539fc8140cf53 and fixed in 5.15.167 with commit b14e7260bb691d7f563f61da07d61e3c8b59a614 |
| Issue introduced in 3.17 with commit da7141fb78db915680616e15677539fc8140cf53 and fixed in 6.1.110 with commit 19cfeba0e4b8eda51484fcf8cf7d150418e1d880 |
| Issue introduced in 3.17 with commit da7141fb78db915680616e15677539fc8140cf53 and fixed in 6.6.51 with commit 8c6e43b3d5f109cf9c61bc188fcc8175404e924f |
| Issue introduced in 3.17 with commit da7141fb78db915680616e15677539fc8140cf53 and fixed in 6.10.10 with commit 962562d4c70c5cdeb4e955d63ff2017c4eca1aad |
| Issue introduced in 3.17 with commit da7141fb78db915680616e15677539fc8140cf53 and fixed in 6.11 with commit 683408258917541bdb294cd717c210a04381931e |
| |
| 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-2024-46780 |
| 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/nilfs2/sysfs.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/b90beafac05931cbfcb6b1bd4f67c1923f47040e |
| https://git.kernel.org/stable/c/ba97ba173f9625d5f34a986088979eae8b80d38e |
| https://git.kernel.org/stable/c/157c0d94b4c40887329418c70ef4edd1a8d6b4ed |
| https://git.kernel.org/stable/c/b14e7260bb691d7f563f61da07d61e3c8b59a614 |
| https://git.kernel.org/stable/c/19cfeba0e4b8eda51484fcf8cf7d150418e1d880 |
| https://git.kernel.org/stable/c/8c6e43b3d5f109cf9c61bc188fcc8175404e924f |
| https://git.kernel.org/stable/c/962562d4c70c5cdeb4e955d63ff2017c4eca1aad |
| https://git.kernel.org/stable/c/683408258917541bdb294cd717c210a04381931e |
