{"cve":"CVE-2026-98512","nvd":{"published":"2026-10-18T16:17:02.457","modified":"2026-10-24T14:16:45.290","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau: RCU-free the scheduler-containing nouveau_sched\n\nstruct nouveau_sched embeds a struct drm_gpu_scheduler (base).\nnouveau_sched_destroy() calls nouveau_sched_fini() (which does\ndrm_sched_fini(&sched->base)) and then frees the object with plain\nkfree(sched).\n\ndrm_sched_fence_get_timeline_name() returns fence->sched->name, and the\nscheduler fence keeps a .release callback so it is not ops-detached on\nsignalling.  A finished fence exported to userspace via drm_syncobj /\nsync_file therefore keeps pointing at &sched->base after nouveau_sched_destroy(),\nand a later get_timeline_name() -- reachable unprivileged through\nSYNC_IOC_FILE_INFO -- dereferences freed memory (KASAN slab-use-after-free\nread).\n\nPer the dma-fence lifetime contract the exporter must keep the data backing a\nsignalled fence alive for an RCU grace period.  Free the scheduler-containing\nobject with kfree_rcu() instead of kfree().","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1},"cwes":[],"references":["https://git.kernel.org/stable/c/35151e9a8274174ccbb92e3b3ba7dc7a008dcada","https://git.kernel.org/stable/c/40edf5eefc3fd94592a91d6eb074d4fc6f606c75","https://git.kernel.org/stable/c/cd6e11b6ebe04a0a1f1435df561acada9eadc563","https://git.kernel.org/stable/c/f7eae6d8d768fabd6b59779ca7da79e02c74e113"],"products":[],"source":"nvd","synced_at":"2026-10-24T16:53:35.584907681+00:00"},"epss":{"cve":"CVE-2026-98512","score":0.00159,"percentile":0.05041,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}