{"cve":"CVE-2026-68271","nvd":{"published":"2026-08-10T13:20:16.097","modified":"2026-08-17T05:18:29.633","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau: fix reversed error cleanup order in ucopy functions\n\nnouveau_uvmm_vm_bind_ucopy() and nouveau_exec_ucopy() place their error\ncleanup labels in allocation order rather than reverse allocation order.\nOn a u_memcpya() failure for in_sync.s, the goto to err_free_ops (or\nerr_free_pushs) frees the first allocation and then falls through to\nerr_free_ins, which calls u_free() on args->in_sync.s.\n\nSince args->in_sync.s still holds the ERR_PTR returned by the failed\nu_memcpya(), and ERR_PTR values are not caught by ZERO_OR_NULL_PTR(),\nkvfree() proceeds to dereference it, which can result in a kernel oops.\nA failure for out_sync.s instead jumps to err_free_ins and skips freeing\nthe first allocation, leading to a memory leak.\n\nFix by swapping the cleanup label order so resources are freed in the\ncorrect reverse allocation sequence.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/2473ac314387a5def7244eb6d6a345934ed140bf","https://git.kernel.org/stable/c/4e109faa9ea2b6c04cc5a99e76db3126575a59d1","https://git.kernel.org/stable/c/ab99ead646b1b833ecd57fe577a2816f2e848167","https://git.kernel.org/stable/c/e15c25c7972d38a9f6bf8c3f7f29179a67263eba","https://git.kernel.org/stable/c/ebbaf64d2635d1e78196c067fa8fa582a7dc17f7"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:47:54.990491175+00:00"},"epss":{"cve":"CVE-2026-68271","score":0.00175,"percentile":0.07018,"date":"2026-10-31"},"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."]}