5.5

CVE-2026-46220

drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission

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

drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission

sdma_v4_0_ring_emit_fence() contains two BUG_ON(addr & 0x3) assertions
that verify fence writeback addresses are dword-aligned.  These
assertions can be reached from unprivileged userspace via crafted
DRM_IOCTL_AMDGPU_CS submissions, causing a fatal kernel panic in a
scheduler worker thread.

Replace both BUG_ON() calls with WARN_ON() to log the condition without
crashing the kernel.  A misaligned fence address at this point indicates
a driver bug, but crashing the kernel is never the correct response when
the assertion is reachable from userspace.

The CS IOCTL path is the correct place to filter invalid submissions;
the ring emission callback is too late to do anything about it.

(cherry picked from commit b90250bd933afd1ba94d86d6b13821997b22b18e)
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.12 < 5.10.258
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.209
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.175
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.140
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.90
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.32
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.9
Linux ≫ Linux Kernel Version7.1 Updaterc1
Linux ≫ Linux Kernel Version7.1 Updaterc2
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.021
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-617 Reachable Assertion

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

https://git.kernel.org/stable/c/4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe
Patch
https://git.kernel.org/stable/c/d331fb241a4602253976ddd65144a8ba2b05665d
Patch
https://git.kernel.org/stable/c/0b91ea46bb68abf98a082bf239092253bbd6aaa2
Patch
https://git.kernel.org/stable/c/a4fd82fb0757c180bf622907397c528b89a827b2
Patch
https://git.kernel.org/stable/c/78d2e624fa073c14970aa097adcf3ea31c157a66
Patch
https://git.kernel.org/stable/c/25e7d56a39657d56d1ea6d78992f7ed15dedb412
Patch
https://git.kernel.org/stable/c/d4c56932d29773e278be6a65a5384a36c95b89a4
Patch
https://git.kernel.org/stable/c/ecaa80318e900ca0c3f687742ede33b41cfd2f8e
Patch