5.5

CVE-2026-46220: drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission

Analyzed
AliasesUBUNTU-CVE-2026-46220DEBIAN-CVE-2026-46220
Published 28-05-2026Last modified 14-06-2026

Vulnerability summary

CVE-2026-46220 is a medium (CVSS 5.5) Reachable Assertion vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 52 · Related 52
OPENSUSE-SU-2026:10954-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 28-05-2026
    PublishedVulnerability first disclosed.
  2. 14-06-2026
    Last modifiedVulnerability information updated.

Description

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)

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

Increase +0.04 pp

From 0.12% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu165 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7, < ecaa80318e900ca0c3f687742ede33b41cfd2f8e | ≥ 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7, < 25e7d56a39657d56d1ea6d78992f7ed15dedb412 | ≥ 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7, < d4c56932d29773e278be6a65a5384a36c95b89a4 | ≥ 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7, < 4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe | ≥ 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7, < d331fb241a4602253976ddd65144a8ba2b05665d | ≥ 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7, < 0b91ea46bb68abf98a082bf239092253bbd6aaa2 | ≥ 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7, < a4fd82fb0757c180bf622907397c528b89a827b2 | ≥ 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7, < 78d2e624fa073c14970aa097adcf3ea31c157a66 | 4.12
  • linux_kernel≥ 4.12, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.90 | ≥ 6.13, < 6.18.32 | ≥ 6.19, < 7.0.9 | 7.1:rc1 | 7.1:rc2
Debian1 product
  • linux< 6.1.176-1 | < 6.12.90-1 | < 7.0.9-1

3 vendors · 168 products

References

51 links
Show all 51 references