| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2021-47659: drm/plane: Move range check for format_count earlier |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/plane: Move range check for format_count earlier |
| |
| While the check for format_count > 64 in __drm_universal_plane_init() |
| shouldn't be hit (it's a WARN_ON), in its current position it will then |
| leak the plane->format_types array and fail to call |
| drm_mode_object_unregister() leaking the modeset identifier. Move it to |
| the start of the function to avoid allocating those resources in the |
| first place. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47659 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.14 with commit e6fc3b68558e4c6d8d160b5daf2511b99afa8814 and fixed in 4.19.247 with commit 4ab7e453a3ee88c274cf97bee9487ab92a66d313 |
| Issue introduced in 4.14 with commit e6fc3b68558e4c6d8d160b5daf2511b99afa8814 and fixed in 5.4.198 with commit 1e29d829ad51d1472dd035487953a6724b56fc33 |
| Issue introduced in 4.14 with commit e6fc3b68558e4c6d8d160b5daf2511b99afa8814 and fixed in 5.10.121 with commit b5cd108143513e4498027b96ec4710702d186f11 |
| Issue introduced in 4.14 with commit e6fc3b68558e4c6d8d160b5daf2511b99afa8814 and fixed in 5.15.46 with commit 978e3d023256bfaf34a0033d40c94e8a8e70cf3c |
| Issue introduced in 4.14 with commit e6fc3b68558e4c6d8d160b5daf2511b99afa8814 and fixed in 5.17.14 with commit 787163d19bc3cdc6ca4b96223f62208534d1cf6b |
| Issue introduced in 4.14 with commit e6fc3b68558e4c6d8d160b5daf2511b99afa8814 and fixed in 5.18.3 with commit ad6dd7a2bac86118985c7b3426e175b9d3c1ec4f |
| Issue introduced in 4.14 with commit e6fc3b68558e4c6d8d160b5daf2511b99afa8814 and fixed in 5.19 with commit 4b674dd69701c2e22e8e7770c1706a69f3b17269 |
| |
| 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-2021-47659 |
| 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_plane.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/4ab7e453a3ee88c274cf97bee9487ab92a66d313 |
| https://git.kernel.org/stable/c/1e29d829ad51d1472dd035487953a6724b56fc33 |
| https://git.kernel.org/stable/c/b5cd108143513e4498027b96ec4710702d186f11 |
| https://git.kernel.org/stable/c/978e3d023256bfaf34a0033d40c94e8a8e70cf3c |
| https://git.kernel.org/stable/c/787163d19bc3cdc6ca4b96223f62208534d1cf6b |
| https://git.kernel.org/stable/c/ad6dd7a2bac86118985c7b3426e175b9d3c1ec4f |
| https://git.kernel.org/stable/c/4b674dd69701c2e22e8e7770c1706a69f3b17269 |
