CVE-2026-43381

nouveau/dpcd: return EBUSY for aux xfer if the device is asleep

MEDIUM

5.5

CVSS Score

Published: May 8, 2026 at 02:21 PM UTC

Updated: June 17, 2026 at 10:49 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

3.16 ≤ v < 5.10.2533.16 ≤ v < 5.15.2033.16 ≤ v < 6.1.1673.16 ≤ v < 6.12.783.16 ≤ v < 6.18.193.16 ≤ v < 6.19.93.16 ≤ v < 6.6.1303.16 ≤ v < 7.05.11 ≤ v < 5.15.2035.16 ≤ v < 6.1.1676.13 ≤ v < 6.18.196.19 ≤ v < 6.19.96.2 ≤ v < 6.6.1306.7 ≤ v < 6.12.783.16 7.0 rc1 7.0 rc28894f4919bc43f821775db2cfff4b917871b2102

Vendor states this is fixed in 178df7c91e6c202579284df9f79d1592a514cdcf (fixed)

Vendor states this is fixed in 24639553a016578222ac597db924dfb6fa5ec8b5 (fixed)

Vendor states this is fixed in 4df518aa196085909fd7e32518ecd27fba60ed69 (fixed)

Vendor states this is fixed in 6bdd2d70c338d52c387d3b3aadc596784ae81b01 (fixed)

Vendor states this is fixed in 8f3c6f08ababad2e3bdd239728cf66a9949446b4 (fixed)

Vendor states this is fixed in ad8fa5bff53f5d1f8394f996850da8ce070eaee3 (fixed)

Vendor states this is fixed in cd24cab2023aa46b595bc6b9cc39d8973d9d0a8c (fixed)

Vendor states this is fixed in fad178ae894930520519ead3c8e0150641466360 (fixed)

Vendor states this is fixed in 3.16 (unaffected)

Vendor states this is fixed in 5.10.253 (unaffected)

Vendor states this is fixed in 5.15.203 (unaffected)

Vendor states this is fixed in 6.1.167 (unaffected)