| 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-2024-35874: aio: Fix null ptr deref in aio_complete() wakeup |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| aio: Fix null ptr deref in aio_complete() wakeup |
| |
| list_del_init_careful() needs to be the last access to the wait queue |
| entry - it effectively unlocks access. |
| |
| Previously, finish_wait() would see the empty list head and skip taking |
| the lock, and then we'd return - but the completion path would still |
| attempt to do the wakeup after the task_struct pointer had been |
| overwritten. |
| |
| The Linux kernel CVE team has assigned CVE-2024-35874 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.8 with commit 71eb6b6b0ba93b1467bccff57b5de746b09113d2 and fixed in 6.8.5 with commit 9678bcc6234d83759fe091c197f5017a32b468da |
| Issue introduced in 6.8 with commit 71eb6b6b0ba93b1467bccff57b5de746b09113d2 and fixed in 6.9 with commit caeb4b0a11b3393e43f7fa8e0a5a18462acc66bd |
| |
| 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-2024-35874 |
| 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/aio.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/9678bcc6234d83759fe091c197f5017a32b468da |
| https://git.kernel.org/stable/c/caeb4b0a11b3393e43f7fa8e0a5a18462acc66bd |
