---
id: CVE-2026-98512
title: 'drm/nouveau: RCU-free the scheduler-containing nouveau_sched'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/nouveau: RCU-free the scheduler-containing nouveau_sched

  struct nouveau_sched embeds a struct drm_gpu_scheduler (base).
  nouveau_sched_destroy() calls nouveau_sched…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5f03a507b29e44a848f315c7240c19894dd8be4f <
    40edf5eefc3fd94592a91d6eb074d4fc6f606c75
  - >-
    Linux >= 5f03a507b29e44a848f315c7240c19894dd8be4f <
    35151e9a8274174ccbb92e3b3ba7dc7a008dcada
  - >-
    Linux >= 5f03a507b29e44a848f315c7240c19894dd8be4f <
    cd6e11b6ebe04a0a1f1435df561acada9eadc563
  - >-
    Linux >= 5f03a507b29e44a848f315c7240c19894dd8be4f <
    f7eae6d8d768fabd6b59779ca7da79e02c74e113
  - Linux 6.8
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:17:27.102Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98512'
references:
  - url: 'https://git.kernel.org/stable/c/40edf5eefc3fd94592a91d6eb074d4fc6f606c75'
  - url: 'https://git.kernel.org/stable/c/35151e9a8274174ccbb92e3b3ba7dc7a008dcada'
  - url: 'https://git.kernel.org/stable/c/cd6e11b6ebe04a0a1f1435df561acada9eadc563'
  - url: 'https://git.kernel.org/stable/c/f7eae6d8d768fabd6b59779ca7da79e02c74e113'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.286Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

drm/nouveau: RCU-free the scheduler-containing nouveau_sched

struct nouveau_sched embeds a struct drm_gpu_scheduler (base).
nouveau_sched_destroy() calls nouveau_sched_fini() (which does
drm_sched_fini(&sched->base)) and then frees the object with plain
kfree(sched).

drm_sched_fence_get_timeline_name() returns fence->sched->name, and the
scheduler fence keeps a .release callback so it is not ops-detached on
signalling.  A finished fence exported to userspace via drm_syncobj /
sync_file therefore keeps pointing at &sched->base after nouveau_sched_destroy(),
and a later get_timeline_name() -- reachable unprivileged through
SYNC_IOC_FILE_INFO -- dereferences freed memory (KASAN slab-use-after-free
read).

Per the dma-fence lifetime contract the exporter must keep the data backing a
signalled fence alive for an RCU grace period.  Free the scheduler-containing
object with kfree_rcu() instead of kfree().

## Affected

- `Linux >= 5f03a507b29e44a848f315c7240c19894dd8be4f < 40edf5eefc3fd94592a91d6eb074d4fc6f606c75`
- `Linux >= 5f03a507b29e44a848f315c7240c19894dd8be4f < 35151e9a8274174ccbb92e3b3ba7dc7a008dcada`
- `Linux >= 5f03a507b29e44a848f315c7240c19894dd8be4f < cd6e11b6ebe04a0a1f1435df561acada9eadc563`
- `Linux >= 5f03a507b29e44a848f315c7240c19894dd8be4f < f7eae6d8d768fabd6b59779ca7da79e02c74e113`
- `Linux 6.8`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.