{"id":"CVE-2026-80928","revision":"9e80ea2acf894aba997e91f2b5cc8c03","records":[{"revision":"9e80ea2acf894aba997e91f2b5cc8c03","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80928","aliases":[],"title":"smack: fix cred UAF in smack_file_send_sigiotask()","description":"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(->real_cred, accessed with __task_cred()) must always be used.\n\nAccessing ->cred on a non-current task is forbidden unless that task is\nbeing created or destroyed; a task is allowed to change its own ->cred\npointer with no synchronization, and changing ->cred should only affect the\ncurrent syscall.\n\nsmack_file_send_sigiotask() was accessing both sets of credentials: First\ntsk->cred, 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.","state":0,"publishedAt":"2026-09-11T19:42:04.044+00:00","modifiedAt":"2026-10-19T08:45:12.134+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"security/smack/smack_lsm.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3b11a1decef07c19443d24ae926982bc8ec9f4c0\",\n                            \"lessThan\": \"a512366d84e134a9eefc2cc40eeb6e80e2ec162c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3b11a1decef07c19443d24ae926982bc8ec9f4c0\",\n                            \"lessThan\": \"7c7fe043f3099d0d35002b248967f75e55345b93\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3b11a1decef07c19443d24ae926982bc8ec9f4c0\",\n                            \"lessThan\": \"f9c7b1f2b9d8f4176d2632743f51400855978ace\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3b11a1decef07c19443d24ae926982bc8ec9f4c0\",\n                            \"lessThan\": \"b5bcf3adfa27279da4401ab8f1e1a706601a92be\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3b11a1decef07c19443d24ae926982bc8ec9f4c0\",\n                            \"lessThan\": \"ed64aa505875a3b4defd504ee8e59e1949246a62\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3b11a1decef07c19443d24ae926982bc8ec9f4c0\",\n                            \"lessThan\": \"b791401bf389a1546a830d2b381ca60fe94c7870\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3b11a1decef07c19443d24ae926982bc8ec9f4c0\",\n                            \"lessThan\": \"fedc88e38ce979a720cd2de042578cb5df3dc8de\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"security/smack/smack_lsm.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.29\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.29\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/a512366d84e134a9eefc2cc40eeb6e80e2ec162c","https://git.kernel.org/stable/c/7c7fe043f3099d0d35002b248967f75e55345b93","https://git.kernel.org/stable/c/f9c7b1f2b9d8f4176d2632743f51400855978ace","https://git.kernel.org/stable/c/b5bcf3adfa27279da4401ab8f1e1a706601a92be","https://git.kernel.org/stable/c/ed64aa505875a3b4defd504ee8e59e1949246a62","https://git.kernel.org/stable/c/b791401bf389a1546a830d2b381ca60fe94c7870","https://git.kernel.org/stable/c/fedc88e38ce979a720cd2de042578cb5df3dc8de"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80928","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80928","identifiers":["CVE-2026-80928"]},"retained":false,"historicalAffected":[]}],"coverage":[]}