drm/amdgpu: reject oversized IBs with per-ring packet limits
CVE-2026-80576 · published 26 Aug 2026
How serious is it
- Severity: high, CVSS score 8.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-80576?
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Who is affected
- Linux Linux: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 to < 67a5d905c17a5066b0f6f950da11da93d56d122b, d38ceaf99ed015f2a0b9af3499791bd3a3daae21 to < 6e164ba1057175fb8a370d8e05cbff5c57eac0c8, d38ceaf99ed015f2a0b9af3499791bd3a3daae21 to < 1474f3970d1afd303e12ff14d06808eabb371576, d38ceaf99ed015f2a0b9af3499791bd3a3daae21 to < 07fe270ec07c138a70afe7a81e115a85c35c545c
- Linux Linux: 4.2
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: reject oversized IBs with per-ring packet limits
On GFX rings, amdgpu_cs_p2_ib() passed user-supplied ib_bytes through
to ib->length_dw without a limit, while ring_emit_ib() encodes length
into packet fields. Oversized values can corrupt adjacent control bits
and destabilize command submission.
Add a per-ring IB packet size limit helper and reject command
submissions exceeding the corresponding dword limit before IB
allocation. Use the documented 20-bit limit for GFX/compute/SDMA/VPE,
and apply the MM fallback limit for other ring types.
(cherry picked from commit 7f48fa2cf62e3fa6c9c3870aa74988f773247e52)
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/67a5d905c17a5066b0f6f950da11da93d56d122b
- git.kernel.org/stable/c/6e164ba1057175fb8a370d8e05cbff5c57eac0c8
- git.kernel.org/stable/c/1474f3970d1afd303e12ff14d06808eabb371576
- git.kernel.org/stable/c/07fe270ec07c138a70afe7a81e115a85c35c545c
- git.kernel.org/stable/c/fd37f9dd5b5ab70a46fa7bc76623c0528d602b27
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON