CVE-2026-98270
Description
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)
How to fix
- Linux Linuxb7c7f07a40037514f8e890aa00f8d7b196d680cf, fc5f845a291fc8175e6857cd6ad042818da192e8, 37583946d8751f8e285c467d770ac0b609b82a23, 315c22712715491f0dfafdaf2c2b437540e68702, 723d4dc628d764b19cf9efca14b82cca5ff020c9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 7692e1ee2446fd1940b5caa6e09779504a58881a ≤ v < b7c7f07a40037514f8e890aa00f8d7b196d680cf, 7692e1ee2446fd1940b5caa6e09779504a58881a ≤ v < fc5f845a291fc8175e6857cd6ad042818da192e8, 7692e1ee2446fd1940b5caa6e09779504a58881a ≤ v < 37583946d8751f8e285c467d770ac0b609b82a23, 7692e1ee2446fd1940b5caa6e09779504a58881a ≤ v < 315c22712715491f0dfafdaf2c2b437540e68702, 7692e1ee2446fd1940b5caa6e09779504a58881a ≤ v < 723d4dc628d764b19cf9efca14b82cca5ff020c9, 6.6 | b7c7f07a40037514f8e890aa00f8d7b196d680cf, fc5f845a291fc8175e6857cd6ad042818da192e8, 37583946d8751f8e285c467d770ac0b609b82a23, 315c22712715491f0dfafdaf2c2b437540e68702, 723d4dc628d764b19cf9efca14b82cca5ff020c9 |
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