{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89457", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.707Z", "datePublished": "2026-09-11T19:43:20.701Z", "dateUpdated": "2026-09-11T19:43:20.701Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:43:20.701Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/block/dasd_eckd.c"], "versions": [{"version": "c729696bcf8b23450043dd9c9972c15e53419ae4", "lessThan": "536407b272402af679155910d7fdeeb4834eefb9", "status": "affected", "versionType": "git"}, {"version": "c729696bcf8b23450043dd9c9972c15e53419ae4", "lessThan": "6452c13646af7c13d7f6668b6690cfb2427e7f7b", "status": "affected", "versionType": "git"}, {"version": "c729696bcf8b23450043dd9c9972c15e53419ae4", "lessThan": "449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5", "status": "affected", "versionType": "git"}, {"version": "c729696bcf8b23450043dd9c9972c15e53419ae4", "lessThan": "2a1780f9fc2493bd34c418a0be6fc58943afcecf", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/block/dasd_eckd.c"], "versions": [{"version": "5.3", "status": "affected"}, {"version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.3-rc1"}]}]}], "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"}}}}

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{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-89457", "lastModified": "2026-09-11T20:19:26.527", "metrics": {}, "published": "2026-09-11T20:19:26.527", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: s390/dasd null pointer dereference leads to denial of service", "id": "2532055", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532055"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the s390/dasd component of the Linux kernel. An unprivileged local user can trigger a null pointer dereference by reading specific world-readable sysfs attributes while the device is being brought online. This can lead to a kernel panic, resulting in a denial of service."], "name": "CVE-2026-89457", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-11T19:43:20Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89457\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89457\nhttps://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf\nhttps://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5\nhttps://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9\nhttps://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b"], "threat_severity": "Moderate"}

{}