| 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-2022-48638: cgroup: cgroup_get_from_id() must check the looked-up kn is a directory |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| cgroup: cgroup_get_from_id() must check the looked-up kn is a directory |
| |
| cgroup has to be one kernfs dir, otherwise kernel panic is caused, |
| especially cgroup id is provide from userspace. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48638 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.14 with commit 6b658c4863c15936872a93c9ee879043bf6393c9 and fixed in 5.15.72 with commit 8484a356cee8ce3d6a8e6266ff99be326e9273ad |
| Issue introduced in 5.14 with commit 6b658c4863c15936872a93c9ee879043bf6393c9 and fixed in 5.19.12 with commit 1e9571887f97b17cf3ffe9aa4da89090ea60988b |
| Issue introduced in 5.14 with commit 6b658c4863c15936872a93c9ee879043bf6393c9 and fixed in 6.0 with commit df02452f3df069a59bc9e69c84435bf115cb6e37 |
| |
| 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-2022-48638 |
| 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: |
| kernel/cgroup/cgroup.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/8484a356cee8ce3d6a8e6266ff99be326e9273ad |
| https://git.kernel.org/stable/c/1e9571887f97b17cf3ffe9aa4da89090ea60988b |
| https://git.kernel.org/stable/c/df02452f3df069a59bc9e69c84435bf115cb6e37 |
