| 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-2024-36923: fs/9p: fix uninitialized values during inode evict |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| fs/9p: fix uninitialized values during inode evict |
| |
| If an iget fails due to not being able to retrieve information |
| from the server then the inode structure is only partially |
| initialized. When the inode gets evicted, references to |
| uninitialized structures (like fscache cookies) were being |
| made. |
| |
| This patch checks for a bad_inode before doing anything other |
| than clearing the inode from the cache. Since the inode is |
| bad, it shouldn't have any state associated with it that needs |
| to be written back (and there really isn't a way to complete |
| those anyways). |
| |
| The Linux kernel CVE team has assigned CVE-2024-36923 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.1.119 with commit 18cf7026355187b8d2b4cdfed61dbf873e9d29ff |
| Fixed in 6.6.63 with commit 3a741b80b3457f079cf637e47800fb7bf8038ad6 |
| Fixed in 6.8.10 with commit 1b4cb6e91f19b81217ad98142ee53a1ab25893fd |
| Fixed in 6.9 with commit 6630036b7c228f57c7893ee0403e92c2db2cd21d |
| |
| 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-2024-36923 |
| 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/9p/vfs_inode.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/18cf7026355187b8d2b4cdfed61dbf873e9d29ff |
| https://git.kernel.org/stable/c/3a741b80b3457f079cf637e47800fb7bf8038ad6 |
| https://git.kernel.org/stable/c/1b4cb6e91f19b81217ad98142ee53a1ab25893fd |
| https://git.kernel.org/stable/c/6630036b7c228f57c7893ee0403e92c2db2cd21d |
