CVE-2026-46220drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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)
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 – < ecaa80318e900ca0c3f687742ede33b41cfd2f8e
- affected 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 – < 25e7d56a39657d56d1ea6d78992f7ed15dedb412
- affected 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 – < d4c56932d29773e278be6a65a5384a36c95b89a4
- affected 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 – < 4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe
- affected 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 – < d331fb241a4602253976ddd65144a8ba2b05665d
- affected 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 – < 0b91ea46bb68abf98a082bf239092253bbd6aaa2
- affected 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 – < a4fd82fb0757c180bf622907397c528b89a827b2
- affected 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 – < 78d2e624fa073c14970aa097adcf3ea31c157a66
- affected 4.12
- unaffected < 4.12
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.140 – ≤ 6.6.*
- unaffected 6.12.90 – ≤ 6.12.*
- unaffected 6.18.32 – ≤ 6.18.*
- unaffected 7.0.9 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References8
- https://git.kernel.org/stable/c/ecaa80318e900ca0c3f687742ede33b41cfd2f8e (opens in a new tab)
- https://git.kernel.org/stable/c/25e7d56a39657d56d1ea6d78992f7ed15dedb412 (opens in a new tab)
- https://git.kernel.org/stable/c/d4c56932d29773e278be6a65a5384a36c95b89a4 (opens in a new tab)
- https://git.kernel.org/stable/c/4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe (opens in a new tab)
- https://git.kernel.org/stable/c/d331fb241a4602253976ddd65144a8ba2b05665d (opens in a new tab)
- https://git.kernel.org/stable/c/0b91ea46bb68abf98a082bf239092253bbd6aaa2 (opens in a new tab)
- https://git.kernel.org/stable/c/a4fd82fb0757c180bf622907397c528b89a827b2 (opens in a new tab)
- https://git.kernel.org/stable/c/78d2e624fa073c14970aa097adcf3ea31c157a66 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32847 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46220)Record last updated .