CVE-2026-98270

Summary

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

drm/amdgpu: check ras and obj before dereference

nbio_v7_9_handle_ras_controller_intr_no_bifring() dereferences ras and obj without checking either for NULL. Both amdgpu_ras_get_context() and amdgpu_ras_find_obj() can return NULL, e.g. during the window between adev->nbio.ras being set (early in amdgpu_ras_init(), by design, to enable the fatal-error interrupt as soon as possible) and the PCIE_BIF ras object actually being created in RAS late_init. Any interrupt in that window crashes in hard-IRQ context.

This is analogous to commit d190b459b2a4 ("drm/amdgpu: the warning dereferencing obj for nbio_v7_4"), which fixed the same issue in the nbio_v7_4 handler.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

(cherry picked from commit c7071767a50a32ed727cf800ac84372429e3b4b3)

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7692e1ee2446fd1940b5caa6e09779504a58881a < b7c7f07a40037514f8e890aa00f8d7b196d680cfaffected
LinuxLinux7692e1ee2446fd1940b5caa6e09779504a58881a < fc5f845a291fc8175e6857cd6ad042818da192e8affected
LinuxLinux7692e1ee2446fd1940b5caa6e09779504a58881a < 37583946d8751f8e285c467d770ac0b609b82a23affected
LinuxLinux7692e1ee2446fd1940b5caa6e09779504a58881a < 315c22712715491f0dfafdaf2c2b437540e68702affected
LinuxLinux7692e1ee2446fd1940b5caa6e09779504a58881a < 723d4dc628d764b19cf9efca14b82cca5ff020c9affected
LinuxLinux6.6affected
LinuxLinux0 < 6.6unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References