| 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-2024-49855: nbd: fix race between timeout and normal completion |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nbd: fix race between timeout and normal completion |
| |
| If request timetout is handled by nbd_requeue_cmd(), normal completion |
| has to be stopped for avoiding to complete this requeued request, other |
| use-after-free can be triggered. |
| |
| Fix the race by clearing NBD_CMD_INFLIGHT in nbd_requeue_cmd(), meantime |
| make sure that cmd->lock is grabbed for clearing the flag and the |
| requeue. |
| |
| The Linux kernel CVE team has assigned CVE-2024-49855 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.19 with commit 2895f1831e911ca87d4efdf43e35eb72a0c7e66e and fixed in 6.1.113 with commit 9c25faf72d780a9c71081710cd48759d61ff6e9b |
| Issue introduced in 5.19 with commit 2895f1831e911ca87d4efdf43e35eb72a0c7e66e and fixed in 6.6.54 with commit 6e73b946a379a1dfbb62626af93843bdfb53753d |
| Issue introduced in 5.19 with commit 2895f1831e911ca87d4efdf43e35eb72a0c7e66e and fixed in 6.10.13 with commit 5236ada8ebbd9e7461f17477357582f5be4f46f7 |
| Issue introduced in 5.19 with commit 2895f1831e911ca87d4efdf43e35eb72a0c7e66e and fixed in 6.11.2 with commit 9a74c3e6c0d686c26ba2aab66d15ddb89dc139cc |
| Issue introduced in 5.19 with commit 2895f1831e911ca87d4efdf43e35eb72a0c7e66e and fixed in 6.12 with commit c9ea57c91f03bcad415e1a20113bdb2077bcf990 |
| Issue introduced in 5.17.15 with commit cdf62c535a9bfd5ff0eef4b91669da39d8abc0c3 |
| Issue introduced in 5.18.4 with commit 5171ef20bae852ff38f4cfdb368bcdcc744776d0 |
| |
| 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-2024-49855 |
| 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/block/nbd.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/9c25faf72d780a9c71081710cd48759d61ff6e9b |
| https://git.kernel.org/stable/c/6e73b946a379a1dfbb62626af93843bdfb53753d |
| https://git.kernel.org/stable/c/5236ada8ebbd9e7461f17477357582f5be4f46f7 |
| https://git.kernel.org/stable/c/9a74c3e6c0d686c26ba2aab66d15ddb89dc139cc |
| https://git.kernel.org/stable/c/c9ea57c91f03bcad415e1a20113bdb2077bcf990 |
