CVE-2026-97905

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97905", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:18:58.200Z", "datePublished": "2026-09-25T10:22:31.046Z", "dateUpdated": "2026-10-19T09:10:31.498Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:10:31.498Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: zero-initialize policy cpumask before sysfs publication\n\ncpufreq_policy_alloc() allocates policy->cpus with alloc_cpumask_var(),\ni.e. without __GFP_ZERO, unlike the sibling related_cpus and real_cpus\nmasks. With CONFIG_CPUMASK_OFFSTACK=y the mask is a separate\nkmalloc_node() allocation, so its bitmap holds whatever the slab allocator\nleft behind:\n\n cpufreq_online()\n cpufreq_policy_alloc()\n alloc_cpumask_var(&policy->cpus) /* bitmap is uninitialized */\n kobject_init_and_add() /* policy%u/ appears in sysfs */\n cpufreq_policy_online()\n cpumask_copy(policy->cpus, cpumask_of(cpu)) /* first valid value */\n\nThis leaves a window in which the sysfs attributes are already reachable\nwhile policy->cpus is still garbage. show()/store() gate on\npolicy_is_inactive(), i.e. cpumask_empty(policy->cpus), so a non-zero\nbitmap makes them run the attribute callbacks on a policy that is not\ninitialized yet.\n\nFix this by using zalloc_cpumask_var() for policy->cpus."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/cpufreq/cpufreq.c"], "versions": [{"version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "lessThan": "e13370c5b549712f49f80234df249303381c53b4", "status": "affected", "versionType": "git"}, {"version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "lessThan": "e807920031ca32b668f9e7a1efbd21858f03d64b", "status": "affected", "versionType": "git"}, {"version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "lessThan": "ca52482508b3ac9febe74ca4f732647d394727b8", "status": "affected", "versionType": "git"}, {"version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "lessThan": "06f273d29e5e0fe5c775a65c563fbeed8cd94c7a", "status": "affected", "versionType": "git"}, {"version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "lessThan": "0de2f3918fbbbb767e7e716178194b66560dd12a", "status": "affected", "versionType": "git"}, {"version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "lessThan": "6e166b9281dec98aed19213a84235250e5fdb081", "status": "affected", "versionType": "git"}, {"version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "lessThan": "bbc0472d2270bf732142ca71579d6ede636174ed", "status": "affected", "versionType": "git"}, {"version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "lessThan": "54d37bcf2f497140b9207968557ddb484058e749", "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/cpufreq/cpufreq.c"], "versions": [{"version": "4.2", "status": "affected"}, {"version": "0", "lessThan": "4.2", "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": "6.12.111", "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": "4.2", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e13370c5b549712f49f80234df249303381c53b4"}, {"url": "https://git.kernel.org/stable/c/e807920031ca32b668f9e7a1efbd21858f03d64b"}, {"url": "https://git.kernel.org/stable/c/ca52482508b3ac9febe74ca4f732647d394727b8"}, {"url": "https://git.kernel.org/stable/c/06f273d29e5e0fe5c775a65c563fbeed8cd94c7a"}, {"url": "https://git.kernel.org/stable/c/0de2f3918fbbbb767e7e716178194b66560dd12a"}, {"url": "https://git.kernel.org/stable/c/6e166b9281dec98aed19213a84235250e5fdb081"}, {"url": "https://git.kernel.org/stable/c/bbc0472d2270bf732142ca71579d6ede636174ed"}, {"url": "https://git.kernel.org/stable/c/54d37bcf2f497140b9207968557ddb484058e749"}], "title": "cpufreq: zero-initialize policy cpumask before sysfs publication", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/cpufreq/cpufreq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e13370c5b549712f49f80234df249303381c53b4", "status": "affected", "version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "versionType": "git"}, {"lessThan": "e807920031ca32b668f9e7a1efbd21858f03d64b", "status": "affected", "version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "versionType": "git"}, {"lessThan": "ca52482508b3ac9febe74ca4f732647d394727b8", "status": "affected", "version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "versionType": "git"}, {"lessThan": "06f273d29e5e0fe5c775a65c563fbeed8cd94c7a", "status": "affected", "version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "versionType": "git"}, {"lessThan": "0de2f3918fbbbb767e7e716178194b66560dd12a", "status": "affected", "version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "versionType": "git"}, {"lessThan": "6e166b9281dec98aed19213a84235250e5fdb081", "status": "affected", "version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "versionType": "git"}, {"lessThan": "bbc0472d2270bf732142ca71579d6ede636174ed", "status": "affected", "version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "versionType": "git"}, {"lessThan": "54d37bcf2f497140b9207968557ddb484058e749", "status": "affected", "version": "2fc3384dc75bf7333384c7a16d12c796f61c3f56", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/cpufreq/cpufreq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.2"}, {"lessThan": "4.2", "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": "6.12.111", "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\ncpufreq: zero-initialize policy cpumask before sysfs publication\n\ncpufreq_policy_alloc() allocates policy->cpus with alloc_cpumask_var(),\ni.e. without __GFP_ZERO, unlike the sibling related_cpus and real_cpus\nmasks. With CONFIG_CPUMASK_OFFSTACK=y the mask is a separate\nkmalloc_node() allocation, so its bitmap holds whatever the slab allocator\nleft behind:\n\n cpufreq_online()\n cpufreq_policy_alloc()\n alloc_cpumask_var(&policy->cpus) /* bitmap is uninitialized */\n kobject_init_and_add() /* policy%u/ appears in sysfs */\n cpufreq_policy_online()\n cpumask_copy(policy->cpus, cpumask_of(cpu)) /* first valid value */\n\nThis leaves a window in which the sysfs attributes are already reachable\nwhile policy->cpus is still garbage. show()/store() gate on\npolicy_is_inactive(), i.e. cpumask_empty(policy->cpus), so a non-zero\nbitmap makes them run the attribute callbacks on a policy that is not\ninitialized yet.\n\nFix this by using zalloc_cpumask_var() for policy->cpus."}], "id": "CVE-2026-97905", "lastModified": "2026-10-19T10:17:40.887", "metrics": {}, "published": "2026-09-25T11:17:17.403", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06f273d29e5e0fe5c775a65c563fbeed8cd94c7a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0de2f3918fbbbb767e7e716178194b66560dd12a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/54d37bcf2f497140b9207968557ddb484058e749"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e166b9281dec98aed19213a84235250e5fdb081"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bbc0472d2270bf732142ca71579d6ede636174ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca52482508b3ac9febe74ca4f732647d394727b8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e13370c5b549712f49f80234df249303381c53b4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e807920031ca32b668f9e7a1efbd21858f03d64b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: cpufreq: zero-initialize policy cpumask before sysfs publication", "id": "2541223", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541223"}, "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-908", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncpufreq: zero-initialize policy cpumask before sysfs publication\ncpufreq_policy_alloc() allocates policy->cpus with alloc_cpumask_var(),\ni.e. without __GFP_ZERO, unlike the sibling related_cpus and real_cpus\nmasks. With CONFIG_CPUMASK_OFFSTACK=y the mask is a separate\nkmalloc_node() allocation, so its bitmap holds whatever the slab allocator\nleft behind:\ncpufreq_online()\ncpufreq_policy_alloc()\nalloc_cpumask_var(&policy->cpus) /* bitmap is uninitialized */\nkobject_init_and_add() /* policy%u/ appears in sysfs */\ncpufreq_policy_online()\ncpumask_copy(policy->cpus, cpumask_of(cpu)) /* first valid value */\nThis leaves a window in which the sysfs attributes are already reachable\nwhile policy->cpus is still garbage. show()/store() gate on\npolicy_is_inactive(), i.e. cpumask_empty(policy->cpus), so a non-zero\nbitmap makes them run the attribute callbacks on a policy that is not\ninitialized yet.\nFix this by using zalloc_cpumask_var() for policy->cpus.", "A flaw was found in the Linux kernel's CPU frequency scaling (cpufreq) subsystem. When creating a frequency policy, the kernel exposes system control files (sysfs attributes) before the CPU mask memory is zero-initialized. A local user could exploit this race condition by accessing these sysfs attributes during CPU initialization, executing operations on an uninitialized policy and causing a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-97905", "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": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97905\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97905\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97905.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2fc3384dc75bf7333384c7a16d12c796f61c3f56,0de2f3918fbbbb767e7e716178194b66560dd12a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2fc3384dc75bf7333384c7a16d12c796f61c3f56,6e166b9281dec98aed19213a84235250e5fdb081)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2fc3384dc75bf7333384c7a16d12c796f61c3f56,bbc0472d2270bf732142ca71579d6ede636174ed)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2fc3384dc75bf7333384c7a16d12c796f61c3f56,54d37bcf2f497140b9207968557ddb484058e749)"}}], "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": "4.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.2)"}}, {"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": "semver", "value": "[7.3-rc3,*]"}}], "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": "2026-09-25T14:30:14.460583+00:00", "updated": "2026-10-01T09:00:05.482293+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}