CVE-2025-68189: drm/msm: Fix GEM free for imported dma-bufs
In the Linux kernel, the following vulnerability has been resolved:
drm/msm: Fix GEM free for imported dma-bufs
Imported dma-bufs also have obj->resv != &obj->resv. So we should check both this condition in addition to flags for handling the NOSHARE case.
Fixes this splat that was reported with IRIS video playback:
------------[ cut here ]------------ WARNING: CPU: 3 PID: 2040 at drivers/gpu/drm/msm/msmgem.c:1127 msmgemfreeobject+0x1f8/0x264 [msm] CPU: 3 UID: 1000 PID: 2040 Comm: .gnome-shell-wr Not tainted 6.17.0-rc7 #1 PREEMPT pstate: 81400005 (Nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : msmgemfreeobject+0x1f8/0x264 [msm] lr : msmgemfreeobject+0x138/0x264 [msm] sp : ffff800092a1bb30 x29: ffff800092a1bb80 x28: ffff800092a1bce8 x27: ffffbc702dbdbe08 x26: 0000000000000008 x25: 0000000000000009 x24: 00000000000000a6 x23: ffff00083c72f850 x22: ffff00083c72f868 x21: ffff00087e69f200 x20: ffff00087e69f330 x19: ffff00084d157ae0 x18: 0000000000000000 x17: 0000000000000000 x16: ffffbc704bd46b80 x15: 0000ffffd0959540 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 x11: ffffbc702e6cdb48 x10: 0000000000000000 x9 : 000000000000003f x8 : ffff800092a1ba90 x7 : 0000000000000000 x6 : 0000000000000020 x5 : ffffbc704bd46c40 x4 : fffffdffe102cf60 x3 : 0000000000400032 x2 : 0000000000020000 x1 : ffff00087e6978e8 x0 : ffff00087e6977e8 Call trace: msmgemfreeobject+0x1f8/0x264 [msm] (P) drmgemobjectfree+0x1c/0x30 [drm] drmgemobjecthandleputunlocked+0x138/0x150 [drm] drmgemobjectreleasehandle+0x5c/0xcc [drm] drmgemhandledelete+0x68/0xbc [drm] drmgemcloseioctl+0x34/0x40 [drm] drmioctlkernel+0xc0/0x130 [drm] drmioctl+0x360/0x4e0 [drm] arm64sysioctl+0xac/0x104 invokesyscall+0x48/0x104 el0svccommon.constprop.0+0x40/0xe0 doel0svc+0x1c/0x28 el0svc+0x34/0xec el0t64synchandler+0xa0/0xe4 el0t64sync+0x198/0x19c ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------
Patchwork: https://patchwork.freedesktop.org/patch/676273/
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch 676273 - Configuration
Apply the patchwork change “drm/msm: Fix GEM free for imported dma-bufs” so the GEM free path also checks the imported dma-bufs condition (“obj->resv != &obj->_resv”) for the _NO_SHARE case, along with the existing flags/handling logic around msm_gem_free_object.
Linux kernel DRM MSM (msm_gem_free_object / GEM free path for imported dma-bufs) Fix GEM free for imported dma-bufs (_NO_SHARE case) by checking imported dma-bufs condition (obj->resv != &obj->_resv) in addition to flags for handling the drm/msm close/delete path = Apply the code fix described for “drm/msm: Fix GEM free for imported dma-bufs”
Event History
Frequently Asked Questions
What is the severity of CVE-2025-68189?
CVE-2025-68189 has been classified as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2025-68189?
To fix CVE-2025-68189, update your Linux kernel to version 6.17.0-rc8 or later.
What systems are affected by CVE-2025-68189?
CVE-2025-68189 affects the Linux Kernel versions up to 6.17.0-rc7.
What is the root cause of CVE-2025-68189?
The vulnerability in CVE-2025-68189 is caused by improper handling of imported dma-bufs in the DRM (Direct Rendering Manager) subsystem.
Is CVE-2025-68189 exploitable remotely?
CVE-2025-68189 is not considered remotely exploitable as it requires local access to the affected system.