{"id":"CVE-2026-89457","revision":"180ba858712f41d8b7b9e0553d95d456","records":[{"revision":"180ba858712f41d8b7b9e0553d95d456","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89457","aliases":[],"title":"s390/dasd: Guard sysfs discipline callbacks against unallocated private data","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: Guard sysfs discipline callbacks against unallocated private data\n\nSeveral sysfs show/store handlers call a discipline callback that\ndereferences device->private, either directly or through the\nDASD_DEFINE_ATTR() macro. During dasd_generic_set_online() the discipline\nis assigned before check_device() allocates device->private, so an\nunprivileged read of one of these world-readable attributes in that window\ndereferences a NULL pointer and panics.\n\nGuard the dereference inside each callback that actually touches\ndevice->private.","state":0,"publishedAt":"2026-09-11T19:43:20.701+00:00","modifiedAt":"2026-10-19T08:47:06.711+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                        \"drivers/s390/block/dasd_eckd.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c729696bcf8b23450043dd9c9972c15e53419ae4\",\n                            \"lessThan\": \"644b666c202cce12ccfcf9ded67089b18f4f7659\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c729696bcf8b23450043dd9c9972c15e53419ae4\",\n                            \"lessThan\": \"4a042d8e5f34282577ece50515cea8bb1246914d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c729696bcf8b23450043dd9c9972c15e53419ae4\",\n                            \"lessThan\": \"bd8b4572528f9604a13bf3c7c2a167f5cf222f72\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c729696bcf8b23450043dd9c9972c15e53419ae4\",\n                            \"lessThan\": \"57db27ccc162afe0726cffec0ae62e410ed2d0e9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c729696bcf8b23450043dd9c9972c15e53419ae4\",\n                            \"lessThan\": \"536407b272402af679155910d7fdeeb4834eefb9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c729696bcf8b23450043dd9c9972c15e53419ae4\",\n                            \"lessThan\": \"6452c13646af7c13d7f6668b6690cfb2427e7f7b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c729696bcf8b23450043dd9c9972c15e53419ae4\",\n                            \"lessThan\": \"449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c729696bcf8b23450043dd9c9972c15e53419ae4\",\n                            \"lessThan\": \"2a1780f9fc2493bd34c418a0be6fc58943afcecf\",\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                        \"drivers/s390/block/dasd_eckd.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.3\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.3\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\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":[],"references":["https://git.kernel.org/stable/c/644b666c202cce12ccfcf9ded67089b18f4f7659","https://git.kernel.org/stable/c/4a042d8e5f34282577ece50515cea8bb1246914d","https://git.kernel.org/stable/c/bd8b4572528f9604a13bf3c7c2a167f5cf222f72","https://git.kernel.org/stable/c/57db27ccc162afe0726cffec0ae62e410ed2d0e9","https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9","https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b","https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5","https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89457","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89457","identifiers":["CVE-2026-89457"]},"retained":false,"historicalAffected":[]}],"coverage":[]}