CVE-2026-98972

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98972", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.383Z", "datePublished": "2026-10-23T12:19:45.458Z", "dateUpdated": "2026-10-23T12:19:45.458Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-23T12:19:45.458Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode()\n\nAfter seeing the patch [1] to guard is_in_v2_mode() with RCU, it makes\nme realize that is_in_v2_mode() may be called in a context where a new\ncgroup filesystem is being rebound with stale cpuset_cgrp_subsys.root\npointer. Avoid this potential UaF situation by adding a new cpuset_v2_mode\nflag which is set when the cpuset_v2_mode mount option is used. This\nflag is written into only when cpuset_bind() is being called with a\nstable cpuset_cgrp_subsys.root value. The is_in_v2_mode() helper is\nmodified to read the new cpuset_v2_mode flag instead of accessing\ncpuset_cgrp_subsys.root directly.\n\n[1] https://lore.kernel.org/lkml/20260929084124.626693-2-arighi@nvidia.com"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/cgroup/cpuset.c"], "versions": [{"version": "b8d1b8ee93df8ffbabbeadd65d39853cfad6d698", "lessThan": "988bf67a13890a37a33201f95947095ca9bec856", "status": "affected", "versionType": "git"}, {"version": "b8d1b8ee93df8ffbabbeadd65d39853cfad6d698", "lessThan": "e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/cgroup/cpuset.c"], "versions": [{"version": "4.14", "status": "affected"}, {"version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "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": "4.14", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/988bf67a13890a37a33201f95947095ca9bec856"}, {"url": "https://git.kernel.org/stable/c/e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469"}], "title": "cgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/cgroup/cpuset.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "988bf67a13890a37a33201f95947095ca9bec856", "status": "affected", "version": "b8d1b8ee93df8ffbabbeadd65d39853cfad6d698", "versionType": "git"}, {"lessThan": "e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469", "status": "affected", "version": "b8d1b8ee93df8ffbabbeadd65d39853cfad6d698", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/cgroup/cpuset.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.14"}, {"lessThan": "4.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "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\ncgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode()\n\nAfter seeing the patch [1] to guard is_in_v2_mode() with RCU, it makes\nme realize that is_in_v2_mode() may be called in a context where a new\ncgroup filesystem is being rebound with stale cpuset_cgrp_subsys.root\npointer. Avoid this potential UaF situation by adding a new cpuset_v2_mode\nflag which is set when the cpuset_v2_mode mount option is used. This\nflag is written into only when cpuset_bind() is being called with a\nstable cpuset_cgrp_subsys.root value. The is_in_v2_mode() helper is\nmodified to read the new cpuset_v2_mode flag instead of accessing\ncpuset_cgrp_subsys.root directly.\n\n[1] https://lore.kernel.org/lkml/20260929084124.626693-2-arighi@nvidia.com"}], "id": "CVE-2026-98972", "lastModified": "2026-10-23T13:17:18.783", "metrics": {}, "published": "2026-10-23T13:17:18.783", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/988bf67a13890a37a33201f95947095ca9bec856"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: cgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode()", "id": "2559748", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559748"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode()\nAfter seeing the patch [1] to guard is_in_v2_mode() with RCU, it makes\nme realize that is_in_v2_mode() may be called in a context where a new\ncgroup filesystem is being rebound with stale cpuset_cgrp_subsys.root\npointer. Avoid this potential UaF situation by adding a new cpuset_v2_mode\nflag which is set when the cpuset_v2_mode mount option is used. This\nflag is written into only when cpuset_bind() is being called with a\nstable cpuset_cgrp_subsys.root value. The is_in_v2_mode() helper is\nmodified to read the new cpuset_v2_mode flag instead of accessing\ncpuset_cgrp_subsys.root directly.\n[1] https://lore.kernel.org/lkml/20260929084124.626693-2-arighi@nvidia.com", "A flaw was found in the Linux kernel. A local user could trigger a use-after-free vulnerability when a control group (cgroup) filesystem is rebound, causing the cpuset subsystem to access a stale pointer. This flaw can lead to a Denial of Service (DoS) by crashing the system or potentially allow privilege escalation."], "name": "CVE-2026-98972", "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": "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": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98972\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98972\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98972.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d1b8ee93df8ffbabbeadd65d39853cfad6d698,988bf67a13890a37a33201f95947095ca9bec856)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d1b8ee93df8ffbabbeadd65d39853cfad6d698,e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d1b8ee93df8ffbabbeadd65d39853cfad6d698,988bf67a13890a37a33201f95947095ca9bec856)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d1b8ee93df8ffbabbeadd65d39853cfad6d698,e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T17:30:16.811146+00:00", "updated": "2026-10-29T22:00:09.209548+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}