{"id":"CVE-2026-64372","summary":"cpufreq: pcc: fix use-after-free and double free in _OSC evaluation","details":"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.","modified":"2026-08-18T03:31:19.458472805Z","published":"2026-07-25T08:50:24.733Z","related":["openSUSE-SU-2026:11476-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64372.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29"},{"type":"WEB","url":"https://git.kernel.org/stable/c/266d3dd8b757b48a576e90f018b51f7b7563cc32"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5cdb25f144b101083d8bf3fd023ad87fbe6850d7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/632666a63116d8061c62a988d1ca39dcd6d27c9b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8e454e9d0bc03446d610ee49abec9dfd424f6541"},{"type":"WEB","url":"https://git.kernel.org/stable/c/982c9f92d57bda2b769851ff6d90d43dcf5f3734"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a36ca93a8ba57464e521d70a337d37f069064111"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64372.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64372"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0f1d683fb35d6c6f49ef696c95757f3970682a0e"},{"fixed":"8e454e9d0bc03446d610ee49abec9dfd424f6541"},{"fixed":"632666a63116d8061c62a988d1ca39dcd6d27c9b"},{"fixed":"5cdb25f144b101083d8bf3fd023ad87fbe6850d7"},{"fixed":"982c9f92d57bda2b769851ff6d90d43dcf5f3734"},{"fixed":"a36ca93a8ba57464e521d70a337d37f069064111"},{"fixed":"6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7"},{"fixed":"0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29"},{"fixed":"266d3dd8b757b48a576e90f018b51f7b7563cc32"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64372.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.34"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.96"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64372.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}