drm/amdgpu: clamp the isolation index for rings outside a partition
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.
CVE-2026-89814
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89814
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "bd22e44ad415ac22e3a4f9a983d2a085f6cb4427",
"lessThan": "964de255497ffd7cb8a86e405b8ac6d927e7e177",
"versionType": "git"
},
{
"status": "affected",
"version": "bd22e44ad415ac22e3a4f9a983d2a085f6cb4427",
"lessThan": "0bfb938182d1313e5cac32ae38dbaaa4eabe4af4",
"versionType": "git"
},
{
"status": "affected",
"version": "bd22e44ad415ac22e3a4f9a983d2a085f6cb4427",
"lessThan": "b30900566642ceb2c9e12b56c2afec28d0fd91a0",
"versionType": "git"
},
{
"status": "affected",
"version": "4277dc1942a8979abe1ef2b55069f42497f885c0",
"versionType": "git"
},
{
"status": "affected",
"version": "6.14.9",
"lessThan": "6.15",
"versionType": "semver"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/amdgpu_device.c",
"drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/amdgpu_device.c",
"drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89814
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36273 · Revision 1
- Added to Heist Feed
- Publisher date