{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b88baab828713ce0b49b185444b2ee83bed373a8"
            },
            {
              "fixed": "2473ac314387a5def7244eb6d6a345934ed140bf"
            },
            {
              "fixed": "e15c25c7972d38a9f6bf8c3f7f29179a67263eba"
            },
            {
              "fixed": "4e109faa9ea2b6c04cc5a99e76db3126575a59d1"
            },
            {
              "fixed": "ebbaf64d2635d1e78196c067fa8fa582a7dc17f7"
            },
            {
              "fixed": "ab99ead646b1b833ecd57fe577a2816f2e848167"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.6.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68271.json"
  },
  "details": "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-\u003ein_sync.s.\n\nSince args-\u003ein_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.",
  "id": "CVE-2026-68271",
  "modified": "2026-08-12T03:51:13.590634787Z",
  "published": "2026-08-10T12:01:46.534Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2473ac314387a5def7244eb6d6a345934ed140bf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e109faa9ea2b6c04cc5a99e76db3126575a59d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab99ead646b1b833ecd57fe577a2816f2e848167"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e15c25c7972d38a9f6bf8c3f7f29179a67263eba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebbaf64d2635d1e78196c067fa8fa582a7dc17f7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68271.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68271"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "drm/nouveau: fix reversed error cleanup order in ucopy functions"
}