| 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-2024-46837: drm/panthor: Restrict high priorities on group_create |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/panthor: Restrict high priorities on group_create |
| |
| We were allowing any users to create a high priority group without any |
| permission checks. As a result, this was allowing possible denial of |
| service. |
| |
| We now only allow the DRM master or users with the CAP_SYS_NICE |
| capability to set higher priorities than PANTHOR_GROUP_PRIORITY_MEDIUM. |
| |
| As the sole user of that uAPI lives in Mesa and hardcode a value of |
| MEDIUM [1], this should be safe to do. |
| |
| Additionally, as those checks are performed at the ioctl level, |
| panthor_group_create now only check for priority level validity. |
| |
| [1]https://gitlab.freedesktop.org/mesa/mesa/-/blob/f390835074bdf162a63deb0311d1a6de527f9f89/src/gallium/drivers/panfrost/pan_csf.c#L1038 |
| |
| The Linux kernel CVE team has assigned CVE-2024-46837 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.10 with commit de85488138247d034eb3241840424a54d660926b and fixed in 6.10.10 with commit 33eb0344e186a2bcc257c6c5a6e65c1cb42adb4a |
| Issue introduced in 6.10 with commit de85488138247d034eb3241840424a54d660926b and fixed in 6.11 with commit 5f7762042f8a5377bd8a32844db353c0311a7369 |
| |
| 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-2024-46837 |
| 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/panthor/panthor_drv.c |
| drivers/gpu/drm/panthor/panthor_sched.c |
| include/uapi/drm/panthor_drm.h |
| |
| |
| 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/33eb0344e186a2bcc257c6c5a6e65c1cb42adb4a |
| https://git.kernel.org/stable/c/5f7762042f8a5377bd8a32844db353c0311a7369 |
