CVE-2026-98399

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98399", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.346Z", "datePublished": "2026-10-14T13:26:00.278Z", "dateUpdated": "2026-10-19T09:18:52.784Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:18:52.784Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block\n\nUnlike kdump, which passes the re-IPL parameter block through os_info,\nthe stand-alone dump passes it through the IPL parm block address and\nchecksum in lowcore.\n\nSome IPL types, like HMC FTP boot or QEMU direct kernel boot, might not\nprovide an IPL parameter block. In this case reipl_type_init() selects\nIPL_TYPE_UNKNOWN and reipl_block_actual remains NULL. Nevertheless,\ndump_reipl_run() unconditionally dereferences it when preparing the\nlowcore fields. This may happen to work by chance when address zero\ncontains readable lowcore data. A zero IPL parameter block address is\nthen stored in lowcore, causing the stand-alone dumper to enter disabled\nwait after completing the dump.\n\nExplicitly store a zero IPL parameter block address and checksum when no\nre-IPL parameter block is available. This does not change the behavior:\nthe stand-alone dumper completes the dump and halts, while valid re-IPL\nparameter blocks continue to be handled as before."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/kernel/ipl.c"], "versions": [{"version": "099b765139929efdcf232f8870804accf8c4cdc5", "lessThan": "41647864e62b28388ecccc23a82f0e0a091f4ef2", "status": "affected", "versionType": "git"}, {"version": "099b765139929efdcf232f8870804accf8c4cdc5", "lessThan": "aed56fa3108b7095e6a048e134981506c056a6cb", "status": "affected", "versionType": "git"}, {"version": "099b765139929efdcf232f8870804accf8c4cdc5", "lessThan": "8d7988e8116c3d29d9e02ca9d37ee84577643f2d", "status": "affected", "versionType": "git"}, {"version": "099b765139929efdcf232f8870804accf8c4cdc5", "lessThan": "280ff19853440d59e031cd8fe161e81305721262", "status": "affected", "versionType": "git"}, {"version": "099b765139929efdcf232f8870804accf8c4cdc5", "lessThan": "37f61b71cbc0caefc01022a19ee56fc2510e2e6e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/kernel/ipl.c"], "versions": [{"version": "2.6.30", "status": "affected"}, {"version": "0", "lessThan": "2.6.30", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "2.6.30", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/41647864e62b28388ecccc23a82f0e0a091f4ef2"}, {"url": "https://git.kernel.org/stable/c/aed56fa3108b7095e6a048e134981506c056a6cb"}, {"url": "https://git.kernel.org/stable/c/8d7988e8116c3d29d9e02ca9d37ee84577643f2d"}, {"url": "https://git.kernel.org/stable/c/280ff19853440d59e031cd8fe161e81305721262"}, {"url": "https://git.kernel.org/stable/c/37f61b71cbc0caefc01022a19ee56fc2510e2e6e"}], "title": "s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/s390/kernel/ipl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "41647864e62b28388ecccc23a82f0e0a091f4ef2", "status": "affected", "version": "099b765139929efdcf232f8870804accf8c4cdc5", "versionType": "git"}, {"lessThan": "aed56fa3108b7095e6a048e134981506c056a6cb", "status": "affected", "version": "099b765139929efdcf232f8870804accf8c4cdc5", "versionType": "git"}, {"lessThan": "8d7988e8116c3d29d9e02ca9d37ee84577643f2d", "status": "affected", "version": "099b765139929efdcf232f8870804accf8c4cdc5", "versionType": "git"}, {"lessThan": "280ff19853440d59e031cd8fe161e81305721262", "status": "affected", "version": "099b765139929efdcf232f8870804accf8c4cdc5", "versionType": "git"}, {"lessThan": "37f61b71cbc0caefc01022a19ee56fc2510e2e6e", "status": "affected", "version": "099b765139929efdcf232f8870804accf8c4cdc5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/s390/kernel/ipl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.30"}, {"lessThan": "2.6.30", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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/ipl: Fix NULL deref in dump_reipl without re-IPL parm block\n\nUnlike kdump, which passes the re-IPL parameter block through os_info,\nthe stand-alone dump passes it through the IPL parm block address and\nchecksum in lowcore.\n\nSome IPL types, like HMC FTP boot or QEMU direct kernel boot, might not\nprovide an IPL parameter block. In this case reipl_type_init() selects\nIPL_TYPE_UNKNOWN and reipl_block_actual remains NULL. Nevertheless,\ndump_reipl_run() unconditionally dereferences it when preparing the\nlowcore fields. This may happen to work by chance when address zero\ncontains readable lowcore data. A zero IPL parameter block address is\nthen stored in lowcore, causing the stand-alone dumper to enter disabled\nwait after completing the dump.\n\nExplicitly store a zero IPL parameter block address and checksum when no\nre-IPL parameter block is available. This does not change the behavior:\nthe stand-alone dumper completes the dump and halts, while valid re-IPL\nparameter blocks continue to be handled as before."}], "id": "CVE-2026-98399", "lastModified": "2026-10-19T10:18:44.700", "metrics": {}, "published": "2026-10-14T14:17:50.893", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/280ff19853440d59e031cd8fe161e81305721262"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/37f61b71cbc0caefc01022a19ee56fc2510e2e6e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/41647864e62b28388ecccc23a82f0e0a091f4ef2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8d7988e8116c3d29d9e02ca9d37ee84577643f2d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aed56fa3108b7095e6a048e134981506c056a6cb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block", "id": "2552222", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2552222"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ns390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block\nUnlike kdump, which passes the re-IPL parameter block through os_info,\nthe stand-alone dump passes it through the IPL parm block address and\nchecksum in lowcore.\nSome IPL types, like HMC FTP boot or QEMU direct kernel boot, might not\nprovide an IPL parameter block. In this case reipl_type_init() selects\nIPL_TYPE_UNKNOWN and reipl_block_actual remains NULL. Nevertheless,\ndump_reipl_run() unconditionally dereferences it when preparing the\nlowcore fields. This may happen to work by chance when address zero\ncontains readable lowcore data. A zero IPL parameter block address is\nthen stored in lowcore, causing the stand-alone dumper to enter disabled\nwait after completing the dump.\nExplicitly store a zero IPL parameter block address and checksum when no\nre-IPL parameter block is available. This does not change the behavior:\nthe stand-alone dumper completes the dump and halts, while valid re-IPL\nparameter blocks continue to be handled as before.", "A flaw was found in the Linux kernel. On s390 (IBM Z) systems booted without an Initial Program Load (IPL) parameter block, such as during direct kernel boot, the kernel does not verify the parameter block before dereferencing it during dump operations. A local privileged user could trigger this condition during system shutdown or dump preparation, causing a null pointer dereference. This issue results in a kernel crash, leading to a denial of service (DoS)."], "name": "CVE-2026-98399", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"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": "2026-10-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98399\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98399\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98399.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[099b765139929efdcf232f8870804accf8c4cdc5,41647864e62b28388ecccc23a82f0e0a091f4ef2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[099b765139929efdcf232f8870804accf8c4cdc5,aed56fa3108b7095e6a048e134981506c056a6cb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[099b765139929efdcf232f8870804accf8c4cdc5,8d7988e8116c3d29d9e02ca9d37ee84577643f2d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[099b765139929efdcf232f8870804accf8c4cdc5,280ff19853440d59e031cd8fe161e81305721262)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[099b765139929efdcf232f8870804accf8c4cdc5,37f61b71cbc0caefc01022a19ee56fc2510e2e6e)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.30"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.30)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-15T03:45:12.188785+00:00", "updated": "2026-10-19T17:15:06.486513+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}