CVE-2026-64372cpufreq: pcc: fix use-after-free and double free in _OSC evaluation
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 98% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e – < 8e454e9d0bc03446d610ee49abec9dfd424f6541
- affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e – < 632666a63116d8061c62a988d1ca39dcd6d27c9b
- affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e – < 5cdb25f144b101083d8bf3fd023ad87fbe6850d7
- affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e – < 982c9f92d57bda2b769851ff6d90d43dcf5f3734
- affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e – < a36ca93a8ba57464e521d70a337d37f069064111
- affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e – < 6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7
- affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e – < 0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29
- affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e – < 266d3dd8b757b48a576e90f018b51f7b7563cc32
- affected 2.6.34
- unaffected < 2.6.34
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/8e454e9d0bc03446d610ee49abec9dfd424f6541 (opens in a new tab)
- https://git.kernel.org/stable/c/632666a63116d8061c62a988d1ca39dcd6d27c9b (opens in a new tab)
- https://git.kernel.org/stable/c/5cdb25f144b101083d8bf3fd023ad87fbe6850d7 (opens in a new tab)
- https://git.kernel.org/stable/c/982c9f92d57bda2b769851ff6d90d43dcf5f3734 (opens in a new tab)
- https://git.kernel.org/stable/c/a36ca93a8ba57464e521d70a337d37f069064111 (opens in a new tab)
- https://git.kernel.org/stable/c/6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7 (opens in a new tab)
- https://git.kernel.org/stable/c/0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29 (opens in a new tab)
- https://git.kernel.org/stable/c/266d3dd8b757b48a576e90f018b51f7b7563cc32 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-48916 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64372)Record last updated .