{"api_version":"1","generated_at":"2026-09-14T04:18:08+00:00","cve":"CVE-2026-89457","urls":{"html":"https://cve.report/CVE-2026-89457","api":"https://cve.report/api/cve/CVE-2026-89457.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89457","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89457"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:26","updated_at":"2026-09-11 20:19:26"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5","name":"https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9","name":"https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf","name":"https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b","name":"https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89457","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89457","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c729696bcf8b23450043dd9c9972c15e53419ae4 536407b272402af679155910d7fdeeb4834eefb9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c729696bcf8b23450043dd9c9972c15e53419ae4 6452c13646af7c13d7f6668b6690cfb2427e7f7b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c729696bcf8b23450043dd9c9972c15e53419ae4 449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c729696bcf8b23450043dd9c9972c15e53419ae4 2a1780f9fc2493bd34c418a0be6fc58943afcecf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"89457","cve":"CVE-2026-89457","epss":"0.001680000","percentile":"0.063410000","score_date":"2026-09-13","updated_at":"2026-09-14 00:18:03"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/s390/block/dasd_eckd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"536407b272402af679155910d7fdeeb4834eefb9","status":"affected","version":"c729696bcf8b23450043dd9c9972c15e53419ae4","versionType":"git"},{"lessThan":"6452c13646af7c13d7f6668b6690cfb2427e7f7b","status":"affected","version":"c729696bcf8b23450043dd9c9972c15e53419ae4","versionType":"git"},{"lessThan":"449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5","status":"affected","version":"c729696bcf8b23450043dd9c9972c15e53419ae4","versionType":"git"},{"lessThan":"2a1780f9fc2493bd34c418a0be6fc58943afcecf","status":"affected","version":"c729696bcf8b23450043dd9c9972c15e53419ae4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/s390/block/dasd_eckd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.3"},{"lessThan":"5.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:43:20.701Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9"},{"url":"https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b"},{"url":"https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5"},{"url":"https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf"}],"title":"s390/dasd: Guard sysfs discipline callbacks against unallocated private data","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89457","datePublished":"2026-09-11T19:43:20.701Z","dateReserved":"2026-09-11T19:38:34.707Z","dateUpdated":"2026-09-11T19:43:20.701Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:26","lastModifiedDate":"2026-09-11 20:19:26","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89457","Ordinal":"1","Title":"s390/dasd: Guard sysfs discipline callbacks against unallocated ","CVE":"CVE-2026-89457","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89457","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"s390/dasd: Guard sysfs discipline callbacks against unallocated "}]}}}