{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "b5bcf3adfa27279da4401ab8f1e1a706601a92be"
            },
            {
              "fixed": "ed64aa505875a3b4defd504ee8e59e1949246a62"
            },
            {
              "fixed": "b791401bf389a1546a830d2b381ca60fe94c7870"
            },
            {
              "fixed": "fedc88e38ce979a720cd2de042578cb5df3dc8de"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.109"
            },
            {
              "fixed": "6.18.50"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80928.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmack: fix cred UAF in smack_file_send_sigiotask()\n\nWhen inspecting the credentials of another task, objective credentials\n(-\u003ereal_cred, accessed with __task_cred()) must always be used.\n\nAccessing -\u003ecred on a non-current task is forbidden unless that task is\nbeing created or destroyed; a task is allowed to change its own -\u003ecred\npointer with no synchronization, and changing -\u003ecred should only affect the\ncurrent syscall.\n\nsmack_file_send_sigiotask() was accessing both sets of credentials: First\ntsk-\u003ecred, then __task_cred(tsk).\n\nFix it, always access the objective credentials here.\n\nI have tested that this bug can lead to a KASAN-reported UAF of struct cred\nin smack_file_send_sigiotask(), and that this fix prevents the race.",
  "id": "CVE-2026-80928",
  "modified": "2026-09-13T03:30:46.377861268Z",
  "published": "2026-09-11T19:42:04.044Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5bcf3adfa27279da4401ab8f1e1a706601a92be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b791401bf389a1546a830d2b381ca60fe94c7870"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed64aa505875a3b4defd504ee8e59e1949246a62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fedc88e38ce979a720cd2de042578cb5df3dc8de"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80928.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80928"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "smack: fix cred UAF in smack_file_send_sigiotask()"
}