Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 8e454e9d0bc03446d610ee49abec9dfd424f6541; affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 632666a63116d8061c62a988d1ca39dcd6d27c9b; affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 5cdb25f144b101083d8bf3fd023ad87fbe6850d7; affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 982c9f92d57bda2b769851ff6d90d43dcf5f3734; affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e before a36ca93a8ba57464e521d70a337d37f069064111; affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7; affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29; affected 0f1d683fb35d6c6f49ef696c95757f3970682a0e before 266d3dd8b757b48a576e90f018b51f7b7563cc32 |
| Linux / Linux | affected 2.6.34; unaffected 0 before 2.6.34; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
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
ADP enrichment
No English description supplied.
No references supplied.