CVE-2026-64372cpufreq: pcc: fix use-after-free and double free in _OSC evaluation
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: cpufreq: pcc: fix use-after-free and double free in _OSC evaluation pcc_cpufreq_do_osc() calls acpi_evaluate_object() twice for the two-phase _OSC negotiation. Between the two calls it freed output.pointer but left output.length unchanged. Since acpi_evaluate_object() treats a non-zero length with a non-NULL pointer as an existing buffer to write into, the second call wrote into freed memory (use-after-free). The subsequent kfree(output.pointer) at out_free then freed the same pointer a second time (double free). Reset output.pointer to NULL and output.length to ACPI_ALLOCATE_BUFFER after freeing the first result, so ACPICA allocates a fresh buffer for each phase independently.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 8e454e9d0bc03446d610ee49abec9dfd424f6541; from 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 632666a63116d8061c62a988d1ca39dcd6d27c9b; from 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 5cdb25f144b101083d8bf3fd023ad87fbe6850d7; from 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 982c9f92d57bda2b769851ff6d90d43dcf5f3734; from 0f1d683fb35d6c6f49ef696c95757f3970682a0e before a36ca93a8ba57464e521d70a337d37f069064111; from 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7; 0f1d683fb35d6c6f49ef696c95757f3970682a0e builds before 0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29; from 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 266d3dd8b757b48a576e90f018b51f7b7563cc32 | CNA record |
linux linux_kernel linux:linux_kernel | from 2.6.34 before 5.10.261; from 5.11 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4 | NVD |
References
- https://git.kernel.org/stable/c/8e454e9d0bc03446d610ee49abec9dfd424f6541patch
- https://git.kernel.org/stable/c/632666a63116d8061c62a988d1ca39dcd6d27c9bpatch
- https://git.kernel.org/stable/c/5cdb25f144b101083d8bf3fd023ad87fbe6850d7patch
- https://git.kernel.org/stable/c/982c9f92d57bda2b769851ff6d90d43dcf5f3734patch
- https://git.kernel.org/stable/c/a36ca93a8ba57464e521d70a337d37f069064111patch
- https://git.kernel.org/stable/c/6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7patch
- https://git.kernel.org/stable/c/0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29patch
- https://git.kernel.org/stable/c/266d3dd8b757b48a576e90f018b51f7b7563cc32patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.