CVE-2026-98476

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98476", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.351Z", "datePublished": "2026-10-18T15:15:45.100Z", "dateUpdated": "2026-10-19T09:20:13.920Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:20:13.920Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()\n\nThe channel path registry entry associated with a CHPID may be removed\nwhile the subchannel's PMCW still references that CHPID. In this case,\nchpid_to_chp() can return NULL, leading to a NULL pointer dereference.\n\nAdd the missing NULL check before dereferencing the returned pointer."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/cio/device_ops.c"], "versions": [{"version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "lessThan": "9d8b21820caed9128945fffcedf03e2a4c21eee2", "status": "affected", "versionType": "git"}, {"version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "lessThan": "5fc54e04dad90b15d0430118b3f288a1d64e66c9", "status": "affected", "versionType": "git"}, {"version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "lessThan": "27e396a89f76f742abdbe9f8c4a58a6e806fdf59", "status": "affected", "versionType": "git"}, {"version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "lessThan": "dbf30e661ceb9a52c94c85719716391dcc29142a", "status": "affected", "versionType": "git"}, {"version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "lessThan": "5e006ac90a4d331db1dd712b91fec849b45ffc01", "status": "affected", "versionType": "git"}, {"version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "lessThan": "c3bbcb32deecc06ebb1762398399b566d5ff2fc9", "status": "affected", "versionType": "git"}, {"version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "lessThan": "44b16b02608058fc72198ac0205969f0f43065df", "status": "affected", "versionType": "git"}, {"version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "lessThan": "5b76268dac968612f7283d59b539036de955b7d9", "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/cio/device_ops.c"], "versions": [{"version": "4.18", "status": "affected"}, {"version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "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": "4.18", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9d8b21820caed9128945fffcedf03e2a4c21eee2"}, {"url": "https://git.kernel.org/stable/c/5fc54e04dad90b15d0430118b3f288a1d64e66c9"}, {"url": "https://git.kernel.org/stable/c/27e396a89f76f742abdbe9f8c4a58a6e806fdf59"}, {"url": "https://git.kernel.org/stable/c/dbf30e661ceb9a52c94c85719716391dcc29142a"}, {"url": "https://git.kernel.org/stable/c/5e006ac90a4d331db1dd712b91fec849b45ffc01"}, {"url": "https://git.kernel.org/stable/c/c3bbcb32deecc06ebb1762398399b566d5ff2fc9"}, {"url": "https://git.kernel.org/stable/c/44b16b02608058fc72198ac0205969f0f43065df"}, {"url": "https://git.kernel.org/stable/c/5b76268dac968612f7283d59b539036de955b7d9"}], "title": "s390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/s390/cio/device_ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "9d8b21820caed9128945fffcedf03e2a4c21eee2", "status": "affected", "version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "versionType": "git"}, {"lessThan": "5fc54e04dad90b15d0430118b3f288a1d64e66c9", "status": "affected", "version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "versionType": "git"}, {"lessThan": "27e396a89f76f742abdbe9f8c4a58a6e806fdf59", "status": "affected", "version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "versionType": "git"}, {"lessThan": "dbf30e661ceb9a52c94c85719716391dcc29142a", "status": "affected", "version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "versionType": "git"}, {"lessThan": "5e006ac90a4d331db1dd712b91fec849b45ffc01", "status": "affected", "version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "versionType": "git"}, {"lessThan": "c3bbcb32deecc06ebb1762398399b566d5ff2fc9", "status": "affected", "version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "versionType": "git"}, {"lessThan": "44b16b02608058fc72198ac0205969f0f43065df", "status": "affected", "version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "versionType": "git"}, {"lessThan": "5b76268dac968612f7283d59b539036de955b7d9", "status": "affected", "version": "199652309a4d6635fca19d7528d73ab9e219bd9a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/s390/cio/device_ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.18"}, {"lessThan": "4.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.271", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "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/cio: Fix NULL pointer dereference in ccw_device_get_util_str()\n\nThe channel path registry entry associated with a CHPID may be removed\nwhile the subchannel's PMCW still references that CHPID. In this case,\nchpid_to_chp() can return NULL, leading to a NULL pointer dereference.\n\nAdd the missing NULL check before dereferencing the returned pointer."}], "id": "CVE-2026-98476", "lastModified": "2026-10-19T10:18:58.260", "metrics": {}, "published": "2026-10-18T16:16:58.130", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/27e396a89f76f742abdbe9f8c4a58a6e806fdf59"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/44b16b02608058fc72198ac0205969f0f43065df"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5b76268dac968612f7283d59b539036de955b7d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5e006ac90a4d331db1dd712b91fec849b45ffc01"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5fc54e04dad90b15d0430118b3f288a1d64e66c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d8b21820caed9128945fffcedf03e2a4c21eee2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c3bbcb32deecc06ebb1762398399b566d5ff2fc9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dbf30e661ceb9a52c94c85719716391dcc29142a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: s390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()", "id": "2554875", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554875"}, "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 Linux kernel's s390 channel I/O (CIO) subsystem. When querying device utility strings, the kernel fails to verify that an associated channel path remains valid after its removal from the registry. A local user could exploit this condition during hardware reconfiguration, resulting in a NULL pointer dereference that causes a system crash and Denial of Service (DoS)."], "name": "CVE-2026-98476", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "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": "Not affected", "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": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98476\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98476\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98476.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[199652309a4d6635fca19d7528d73ab9e219bd9a,9d8b21820caed9128945fffcedf03e2a4c21eee2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[199652309a4d6635fca19d7528d73ab9e219bd9a,5fc54e04dad90b15d0430118b3f288a1d64e66c9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[199652309a4d6635fca19d7528d73ab9e219bd9a,27e396a89f76f742abdbe9f8c4a58a6e806fdf59)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[199652309a4d6635fca19d7528d73ab9e219bd9a,dbf30e661ceb9a52c94c85719716391dcc29142a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[199652309a4d6635fca19d7528d73ab9e219bd9a,5e006ac90a4d331db1dd712b91fec849b45ffc01)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[199652309a4d6635fca19d7528d73ab9e219bd9a,c3bbcb32deecc06ebb1762398399b566d5ff2fc9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[199652309a4d6635fca19d7528d73ab9e219bd9a,44b16b02608058fc72198ac0205969f0f43065df)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[199652309a4d6635fca19d7528d73ab9e219bd9a,5b76268dac968612f7283d59b539036de955b7d9)"}}], "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": "4.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.271,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.222,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.189,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc5,*]"}}], "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": "2026-10-19T00:00:10.775387+00:00", "updated": "2026-10-22T23:15:13.546236+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}