CVE-2026-89814drm/amdgpu: clamp the isolation index for rings outside a partition
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: clamp the isolation index for rings outside a partition adev->isolation[] has one slot per partition, but a ring that is not assigned to one keeps AMDGPU_XCP_NO_PARTITION, which is ~0, so indexing the array with it is out of bounds. SDMA submissions hit this on both the isolation enforcement and the VM flush path and trip UBSAN. Fall back to the first slot the way the cleaner shader path already does, and stop taking the address before the ring type check that makes it relevant.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from bd22e44ad415ac22e3a4f9a983d2a085f6cb4427 before 964de255497ffd7cb8a86e405b8ac6d927e7e177; from bd22e44ad415ac22e3a4f9a983d2a085f6cb4427 before 0bfb938182d1313e5cac32ae38dbaaa4eabe4af4; from bd22e44ad415ac22e3a4f9a983d2a085f6cb4427 before b30900566642ceb2c9e12b56c2afec28d0fd91a0; 4277dc1942a8979abe1ef2b55069f42497f885c0; from 6.14.9 before 6.15 | CNA record |
References
- https://git.kernel.org/stable/c/964de255497ffd7cb8a86e405b8ac6d927e7e177
- https://git.kernel.org/stable/c/0bfb938182d1313e5cac32ae38dbaaa4eabe4af4
- https://git.kernel.org/stable/c/b30900566642ceb2c9e12b56c2afec28d0fd91a0
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.