What’s Vulnerable › Vulnerabilities

CVE-2026-68238: drm/amdgpu: Release VFCT ACPI table reference

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-10 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Release VFCT ACPI table reference amdgpu_acpi_vfct_bios() fetches the VFCT table with acpi_get_table() but never releases it. acpi_get_table() takes a reference on the table (incrementing its validation_count and mapping it on the 0->1 transition); without a paired acpi_put_table() the mapping is leaked on every call, whether or not a matching VBIOS image is found. Route all exit paths after the table is acquired through a common acpi_put_table(). The VBIOS image is copied out with kmemdup() before the table is released, so it remains valid for the caller. (cherry picked from commit ca5988682b4cba4cd125a0fa99b2de1239164ae4)

Affected products

• Linux: 4.2 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1748043b5114ce5ee5ee874d5f821a158d70631c
• https://git.kernel.org/stable/c/1c19e02a689661a9687d689dcc5995d3be538262
• https://git.kernel.org/stable/c/312278b3091912fa56a6a587609f17dcb33465c2
• https://git.kernel.org/stable/c/50a75929c0c5e8ab29a3ac49dc92489873d9d261
• https://git.kernel.org/stable/c/65bff26617607c1331283232016c0e89088c5b78
• https://git.kernel.org/stable/c/9b7de3ee5d2c5ee2a706e5f7ca0126f4fbea4da8

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