{"id":"CVE-2026-64372","revision":"55aba54af2b14ff19c980fbfe153bc4f","records":[{"revision":"55aba54af2b14ff19c980fbfe153bc4f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64372","aliases":[],"title":"cpufreq: pcc: fix use-after-free and double free in _OSC evaluation","description":"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.","state":0,"publishedAt":"2026-07-25T08:50:24.733+00:00","modifiedAt":"2026-10-19T20:38:25.14+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/cpufreq/pcc-cpufreq.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0f1d683fb35d6c6f49ef696c95757f3970682a0e\",\n                            \"lessThan\": \"8e454e9d0bc03446d610ee49abec9dfd424f6541\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0f1d683fb35d6c6f49ef696c95757f3970682a0e\",\n                            \"lessThan\": \"632666a63116d8061c62a988d1ca39dcd6d27c9b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0f1d683fb35d6c6f49ef696c95757f3970682a0e\",\n                            \"lessThan\": \"5cdb25f144b101083d8bf3fd023ad87fbe6850d7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0f1d683fb35d6c6f49ef696c95757f3970682a0e\",\n                            \"lessThan\": \"982c9f92d57bda2b769851ff6d90d43dcf5f3734\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0f1d683fb35d6c6f49ef696c95757f3970682a0e\",\n                            \"lessThan\": \"a36ca93a8ba57464e521d70a337d37f069064111\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0f1d683fb35d6c6f49ef696c95757f3970682a0e\",\n                            \"lessThan\": \"6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0f1d683fb35d6c6f49ef696c95757f3970682a0e\",\n                            \"lessThan\": \"0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0f1d683fb35d6c6f49ef696c95757f3970682a0e\",\n                            \"lessThan\": \"266d3dd8b757b48a576e90f018b51f7b7563cc32\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/cpufreq/pcc-cpufreq.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.34\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.34\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.261\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.96\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.39\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.4\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/8e454e9d0bc03446d610ee49abec9dfd424f6541","https://git.kernel.org/stable/c/632666a63116d8061c62a988d1ca39dcd6d27c9b","https://git.kernel.org/stable/c/5cdb25f144b101083d8bf3fd023ad87fbe6850d7","https://git.kernel.org/stable/c/982c9f92d57bda2b769851ff6d90d43dcf5f3734","https://git.kernel.org/stable/c/a36ca93a8ba57464e521d70a337d37f069064111","https://git.kernel.org/stable/c/6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7","https://git.kernel.org/stable/c/0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29","https://git.kernel.org/stable/c/266d3dd8b757b48a576e90f018b51f7b7563cc32"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64372","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64372","identifiers":["CVE-2026-64372"]},"retained":false,"historicalAffected":[]}],"coverage":[]}