CVE-2026-68238

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 312278b3091912fa56a6a587609f17dcb33465c2affected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 9b7de3ee5d2c5ee2a706e5f7ca0126f4fbea4da8affected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 65bff26617607c1331283232016c0e89088c5b78affected
LinuxLinux4.2affected
LinuxLinux0 < 4.2unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References