CVE-2026-80728

Summary

In the Linux kernel, the following vulnerability has been resolved:

Revert "drm/amdgpu: fix aperture mapping leak"

devres teardown is LIFO. The aperture devres node was registered after the DRM device node, so devres_release_all() unmaps the aperture before the DRM device release callback fires amdgpu_device_fini_sw(). IP sw_fini callbacks (e.g. vcn_v4_0_sw_fini) write to fw_shared through a pointer derived from aper_base_kaddr, causing a kernel page fault on probe failure / rollback:

BUG: unable to handle page fault … PMD 0 RIP: vcn_v4_0_sw_fini+0x7b/0x170 [amdgpu] Call Trace: amdgpu_device_fini_sw amdgpu_driver_release_kms devm_drm_dev_init_release devres_release_all

This reverts commit d871e99879cb5fd1fa798b006b4888887e63a17a.

(cherry picked from commit 336e0cd576817ac64a4b394ca2b3680029f3e37f)

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7380f1bfe9d7ed3a4ca9d99a5c4df840fff9af2aaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 96d26143882f9cb47dcc1f3dd4e26d047e53ab9baffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a2e326c52c4bcecc033cd3ca2733fdbe30fbf55daffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 496846a9411136eb9e86ad4f4e62d751bd1e1db5affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b96c529cd2551b78316a4afa3237b2ed96ba03c8affected
LinuxLinux0 < 6.6.152affected
LinuxLinux0 < 6.12.104affected
LinuxLinux0 < 6.18.45affected
LinuxLinux0 < 7.1.9affected
LinuxLinux6.6.152 <= 6.6.*unaffected
LinuxLinux6.12.104 <= 6.12.*unaffected
LinuxLinux6.18.45 <= 6.18.*unaffected
LinuxLinux7.1.9 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References