{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64372", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.783Z", "datePublished": "2026-07-25T08:50:24.733Z", "dateUpdated": "2026-08-17T04:54:22.197Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:54:22.197Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: pcc: fix use-after-free and double free in _OSC evaluation\n\npcc_cpufreq_do_osc() calls acpi_evaluate_object() twice for the\ntwo-phase _OSC negotiation. Between the two calls it freed\noutput.pointer but left output.length unchanged. Since\nacpi_evaluate_object() treats a non-zero length with a non-NULL\npointer as an existing buffer to write into, the second call wrote\ninto freed memory (use-after-free). The subsequent kfree(output.pointer)\nat out_free then freed the same pointer a second time (double free).\n\nReset output.pointer to NULL and output.length to ACPI_ALLOCATE_BUFFER\nafter freeing the first result, so ACPICA allocates a fresh buffer for\neach phase independently."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The flaw is reached during local initialization of the x86 PCC cpufreq driver on systems exposing the required ACPI PCC objects; no network, radio, or hot-plug input reaches this path.\nAC:L - Once two-phase _OSC negotiation succeeds, the stale-buffer write and subsequent double free occur deterministically without a race or other condition beyond attacker influence.\nPR:L - PCC platform-device creation and driver probing can occur automatically during boot or module autoload, leaving exploitable heap corruption without the attacker needing CAP_SYS_MODULE. A basic local user can groom and consume the resulting overlapping or corrupted slab objects.\nUI:N - The vulnerable driver probe and _OSC negotiation occur automatically and require no victim action.\nS:U - The corruption affects the host kernel within the same security authority and does not inherently cross a VM, IOMMU, or sandbox boundary.\nC:H - The use-after-free and double free can produce overlapping kernel heap objects, enabling disclosure of arbitrary kernel memory.\nI:H - The freed-object write and allocator freelist corruption can enable arbitrary kernel-memory modification and control-flow hijacking.\nA:H - Hardened allocators may immediately detect the double free and stop the kernel, while other configurations can crash or panic from the corrupted slab freelist."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/cpufreq/pcc-cpufreq.c"], "versions": [{"version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "lessThan": "8e454e9d0bc03446d610ee49abec9dfd424f6541", "status": "affected", "versionType": "git"}, {"version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "lessThan": "632666a63116d8061c62a988d1ca39dcd6d27c9b", "status": "affected", "versionType": "git"}, {"version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "lessThan": "5cdb25f144b101083d8bf3fd023ad87fbe6850d7", "status": "affected", "versionType": "git"}, {"version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "lessThan": "982c9f92d57bda2b769851ff6d90d43dcf5f3734", "status": "affected", "versionType": "git"}, {"version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "lessThan": "a36ca93a8ba57464e521d70a337d37f069064111", "status": "affected", "versionType": "git"}, {"version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "lessThan": "6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7", "status": "affected", "versionType": "git"}, {"version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "lessThan": "0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29", "status": "affected", "versionType": "git"}, {"version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "lessThan": "266d3dd8b757b48a576e90f018b51f7b7563cc32", "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/pcc-cpufreq.c"], "versions": [{"version": "2.6.34", "status": "affected"}, {"version": "0", "lessThan": "2.6.34", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "2.6.34", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8e454e9d0bc03446d610ee49abec9dfd424f6541"}, {"url": "https://git.kernel.org/stable/c/632666a63116d8061c62a988d1ca39dcd6d27c9b"}, {"url": "https://git.kernel.org/stable/c/5cdb25f144b101083d8bf3fd023ad87fbe6850d7"}, {"url": "https://git.kernel.org/stable/c/982c9f92d57bda2b769851ff6d90d43dcf5f3734"}, {"url": "https://git.kernel.org/stable/c/a36ca93a8ba57464e521d70a337d37f069064111"}, {"url": "https://git.kernel.org/stable/c/6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7"}, {"url": "https://git.kernel.org/stable/c/0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29"}, {"url": "https://git.kernel.org/stable/c/266d3dd8b757b48a576e90f018b51f7b7563cc32"}], "title": "cpufreq: pcc: fix use-after-free and double free in _OSC evaluation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/cpufreq/pcc-cpufreq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8e454e9d0bc03446d610ee49abec9dfd424f6541", "status": "affected", "version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "versionType": "git"}, {"lessThan": "632666a63116d8061c62a988d1ca39dcd6d27c9b", "status": "affected", "version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "versionType": "git"}, {"lessThan": "5cdb25f144b101083d8bf3fd023ad87fbe6850d7", "status": "affected", "version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "versionType": "git"}, {"lessThan": "982c9f92d57bda2b769851ff6d90d43dcf5f3734", "status": "affected", "version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "versionType": "git"}, {"lessThan": "a36ca93a8ba57464e521d70a337d37f069064111", "status": "affected", "version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "versionType": "git"}, {"lessThan": "6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7", "status": "affected", "version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "versionType": "git"}, {"lessThan": "0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29", "status": "affected", "version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "versionType": "git"}, {"lessThan": "266d3dd8b757b48a576e90f018b51f7b7563cc32", "status": "affected", "version": "0f1d683fb35d6c6f49ef696c95757f3970682a0e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/cpufreq/pcc-cpufreq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.34"}, {"lessThan": "2.6.34", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.96", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.39", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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: pcc: fix use-after-free and double free in _OSC evaluation\n\npcc_cpufreq_do_osc() calls acpi_evaluate_object() twice for the\ntwo-phase _OSC negotiation. Between the two calls it freed\noutput.pointer but left output.length unchanged. Since\nacpi_evaluate_object() treats a non-zero length with a non-NULL\npointer as an existing buffer to write into, the second call wrote\ninto freed memory (use-after-free). The subsequent kfree(output.pointer)\nat out_free then freed the same pointer a second time (double free).\n\nReset output.pointer to NULL and output.length to ACPI_ALLOCATE_BUFFER\nafter freeing the first result, so ACPICA allocates a fresh buffer for\neach phase independently."}], "id": "CVE-2026-64372", "lastModified": "2026-08-17T05:17:39.690", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-07-25T10:17:20.147", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/266d3dd8b757b48a576e90f018b51f7b7563cc32"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5cdb25f144b101083d8bf3fd023ad87fbe6850d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/632666a63116d8061c62a988d1ca39dcd6d27c9b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8e454e9d0bc03446d610ee49abec9dfd424f6541"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/982c9f92d57bda2b769851ff6d90d43dcf5f3734"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a36ca93a8ba57464e521d70a337d37f069064111"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: cpufreq: pcc: fix use-after-free and double free in _OSC evaluation", "id": "2507191", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507191"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-763", "details": ["A flaw was found in the Linux kernel's cpufreq subsystem. This vulnerability, a use-after-free and double-free error, occurs during the two-phase _OSC negotiation in the `pcc_cpufreq_do_osc()` function. A local attacker could exploit this memory corruption to cause a denial of service (DoS) or potentially achieve privilege escalation."], "name": "CVE-2026-64372", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64372\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64372\nhttps://lore.kernel.org/linux-cve-announce/2026072523-CVE-2026-64372-794b@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0f1d683fb35d6c6f49ef696c95757f3970682a0e,8e454e9d0bc03446d610ee49abec9dfd424f6541)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0f1d683fb35d6c6f49ef696c95757f3970682a0e,632666a63116d8061c62a988d1ca39dcd6d27c9b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0f1d683fb35d6c6f49ef696c95757f3970682a0e,5cdb25f144b101083d8bf3fd023ad87fbe6850d7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0f1d683fb35d6c6f49ef696c95757f3970682a0e,982c9f92d57bda2b769851ff6d90d43dcf5f3734)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0f1d683fb35d6c6f49ef696c95757f3970682a0e,6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0f1d683fb35d6c6f49ef696c95757f3970682a0e,0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0f1d683fb35d6c6f49ef696c95757f3970682a0e,266d3dd8b757b48a576e90f018b51f7b7563cc32)"}}], "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": "2.6.34"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.34)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "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": "2026-07-25T15:15:04.504527+00:00", "updated": "2026-08-04T14:45:03.294513+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}