CVE-2026-68271drm/nouveau: fix reversed error cleanup order in ucopy functions
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix reversed error cleanup order in ucopy functions nouveau_uvmm_vm_bind_ucopy() and nouveau_exec_ucopy() place their error cleanup labels in allocation order rather than reverse allocation order. On a u_memcpya() failure for in_sync.s, the goto to err_free_ops (or err_free_pushs) frees the first allocation and then falls through to err_free_ins, which calls u_free() on args->in_sync.s. Since args->in_sync.s still holds the ERR_PTR returned by the failed u_memcpya(), and ERR_PTR values are not caught by ZERO_OR_NULL_PTR(), kvfree() proceeds to dereference it, which can result in a kernel oops. A failure for out_sync.s instead jumps to err_free_ins and skips freeing the first allocation, leading to a memory leak. Fix by swapping the cleanup label order so resources are freed in the correct reverse allocation sequence.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 7 days later
· 7 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected b88baab828713ce0b49b185444b2ee83bed373a8 – < 2473ac314387a5def7244eb6d6a345934ed140bf
- affected b88baab828713ce0b49b185444b2ee83bed373a8 – < e15c25c7972d38a9f6bf8c3f7f29179a67263eba
- affected b88baab828713ce0b49b185444b2ee83bed373a8 – < 4e109faa9ea2b6c04cc5a99e76db3126575a59d1
- affected b88baab828713ce0b49b185444b2ee83bed373a8 – < ebbaf64d2635d1e78196c067fa8fa582a7dc17f7
- affected b88baab828713ce0b49b185444b2ee83bed373a8 – < ab99ead646b1b833ecd57fe577a2816f2e848167
- affected 6.6
- unaffected < 6.6
- unaffected 6.6.148 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References5
- https://git.kernel.org/stable/c/2473ac314387a5def7244eb6d6a345934ed140bf (opens in a new tab)
- https://git.kernel.org/stable/c/e15c25c7972d38a9f6bf8c3f7f29179a67263eba (opens in a new tab)
- https://git.kernel.org/stable/c/4e109faa9ea2b6c04cc5a99e76db3126575a59d1 (opens in a new tab)
- https://git.kernel.org/stable/c/ebbaf64d2635d1e78196c067fa8fa582a7dc17f7 (opens in a new tab)
- https://git.kernel.org/stable/c/ab99ead646b1b833ecd57fe577a2816f2e848167 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55372 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-68271)Record last updated .