Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nouveau/dpcd: return EBUSY for aux xfer if the device is asleep If we have runtime suspended, and userspace wants to use /dev/drm_dp_* then just tell it the device is busy instead of crashing in the GSP code. WARNING: CPU: 2 PID: 565741 at drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c:164 r535_gsp_msgq_wait+0x9a/0xb0 [nouveau] CPU: 2 UID: 0 PID: 565741 Comm: fwupd Not tainted 6.18.10-200.fc43.x86_64 #1 PREEMPT(lazy) Hardware name: LENOVO 20QTS0PQ00/20QTS0PQ00, BIOS N2OET65W (1.52 ) 08/05/2024 RIP: 0010:r535_gsp_msgq_wait+0x9a/0xb0 [nouveau] This is a simple fix to get backported. We should probably engineer a proper power domain solution to wake up devices and keep them awake while fw updates are happening.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.16, < 5.10.253 |
References
- https://git.kernel.org/stable/c/178df7c91e6c202579284df9f79d1592a514cdcfPatch
- https://git.kernel.org/stable/c/24639553a016578222ac597db924dfb6fa5ec8b5Patch
- https://git.kernel.org/stable/c/4df518aa196085909fd7e32518ecd27fba60ed69Patch
- https://git.kernel.org/stable/c/6bdd2d70c338d52c387d3b3aadc596784ae81b01Patch
- https://git.kernel.org/stable/c/8f3c6f08ababad2e3bdd239728cf66a9949446b4Patch
- https://git.kernel.org/stable/c/ad8fa5bff53f5d1f8394f996850da8ce070eaee3Patch
- https://git.kernel.org/stable/c/cd24cab2023aa46b595bc6b9cc39d8973d9d0a8cPatch
- https://git.kernel.org/stable/c/fad178ae894930520519ead3c8e0150641466360Patch
FAQ
What is CVE-2026-43381?
CVE-2026-43381 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: nouveau/dpcd: return EBUSY for aux xfer if the device is asleep If we have runtime suspended, and userspace wants to use /dev/drm_...
How severe is CVE-2026-43381?
CVE-2026-43381 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43381?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.