| 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-2024-38630: watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger |
| |
| When the cpu5wdt module is removing, the origin code uses del_timer() to |
| de-activate the timer. If the timer handler is running, del_timer() could |
| not stop it and will return directly. If the port region is released by |
| release_region() and then the timer handler cpu5wdt_trigger() calls outb() |
| to write into the region that is released, the use-after-free bug will |
| happen. |
| |
| Change del_timer() to timer_shutdown_sync() in order that the timer handler |
| could be finished before the port region is released. |
| |
| The Linux kernel CVE team has assigned CVE-2024-38630 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.6.33 with commit 9b1c063ffc075abf56f63e55d70b9778ff534314 |
| Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.9.4 with commit f19686d616500cd0d47b30cee82392b53f7f784a |
| Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.10 with commit 573601521277119f2e2ba5f28ae6e87fc594f4d4 |
| |
| 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-2024-38630 |
| 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: |
| drivers/watchdog/cpu5wdt.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/9b1c063ffc075abf56f63e55d70b9778ff534314 |
| https://git.kernel.org/stable/c/f19686d616500cd0d47b30cee82392b53f7f784a |
| https://git.kernel.org/stable/c/573601521277119f2e2ba5f28ae6e87fc594f4d4 |
