| 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-2022-48981: drm/shmem-helper: Remove errant put in error path |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/shmem-helper: Remove errant put in error path |
| |
| drm_gem_shmem_mmap() doesn't own this reference, resulting in the GEM |
| object getting prematurely freed leading to a later use-after-free. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48981 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.2 with commit 2194a63a818db71065ebe09c8104f5f021ca4e7b and fixed in 5.4.227 with commit 585a07b820059462e0c93b76c7de2cd946b26b40 |
| Issue introduced in 5.2 with commit 2194a63a818db71065ebe09c8104f5f021ca4e7b and fixed in 5.10.159 with commit 6a4da05acd062ae7774b6b19cef2b7d922902d36 |
| Issue introduced in 5.2 with commit 2194a63a818db71065ebe09c8104f5f021ca4e7b and fixed in 5.15.83 with commit 83e3da8bb92fcfa7a1d232cf55f9e6c49bb84942 |
| Issue introduced in 5.2 with commit 2194a63a818db71065ebe09c8104f5f021ca4e7b and fixed in 6.0.13 with commit 586847b98e20ab02212ca5c1fc46680384e68a28 |
| Issue introduced in 5.2 with commit 2194a63a818db71065ebe09c8104f5f021ca4e7b and fixed in 6.1 with commit 24013314be6ee4ee456114a671e9fa3461323de8 |
| |
| 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-2022-48981 |
| 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/gpu/drm/drm_gem_shmem_helper.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/585a07b820059462e0c93b76c7de2cd946b26b40 |
| https://git.kernel.org/stable/c/6a4da05acd062ae7774b6b19cef2b7d922902d36 |
| https://git.kernel.org/stable/c/83e3da8bb92fcfa7a1d232cf55f9e6c49bb84942 |
| https://git.kernel.org/stable/c/586847b98e20ab02212ca5c1fc46680384e68a28 |
| https://git.kernel.org/stable/c/24013314be6ee4ee456114a671e9fa3461323de8 |
