| 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-2022-49531: loop: implement ->free_disk |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| loop: implement ->free_disk |
| |
| Ensure that the lo_device which is stored in the gendisk private |
| data is valid until the gendisk is freed. Currently the loop driver |
| uses a lot of effort to make sure a device is not freed when it is |
| still in use, but to to fix a potential deadlock this will be relaxed |
| a bit soon. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49531 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.18.3 with commit aadd1443aae7fe8956e3b11157827067f034406a |
| Fixed in 5.19 with commit d2c7f56f8b5256d57f9e3fc7794c31361d43bdd9 |
| |
| 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-2022-49531 |
| 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/loop.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/aadd1443aae7fe8956e3b11157827067f034406a |
| https://git.kernel.org/stable/c/d2c7f56f8b5256d57f9e3fc7794c31361d43bdd9 |
