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CVE-2026-23065: platform/x86/amd: Fix memory leak in wbrf_record()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-04 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86/amd: Fix memory leak in wbrf_record() The tmp buffer is allocated using kcalloc() but is not freed if acpi_evaluate_dsm() fails. This causes a memory leak in the error path. Fix this by explicitly freeing the tmp buffer in the error handling path of acpi_evaluate_dsm().

Affected products

• Linux kernel: from 6.8 before 6.12.68; from 6.13 before 6.18.8; 6.19-rc1, 6.19-rc2, 6.19-rc3, 6.19-rc4, 6.19-rc5, 6.19-rc6 — fixed in 6.12.68, 6.18.8

How to fix

Upgrade to a fixed version: Linux kernel 6.12.68, 6.18.8. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1152dffe01af86e42ce2b208b92ef7f8c275d130
• https://git.kernel.org/stable/c/1a0072bd1f1e559eda3e91a24dbc51c9eb025c54
• https://git.kernel.org/stable/c/2bf1877b7094c684e1d652cac6912cfbc507ad3e

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