CVE-2026-89812

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: force complete the MES ring fences on reset The MES scheduler ring has no drm scheduler (no_scheduler = true), so it is skipped by the force-completion loop in amdgpu_device_pre_asic_reset(). It uses a polling fence whose hw value lives in wb (GTT) memory and survives a MODE1 reset, while fence_drv.sync_seq keeps advancing for every packet. When the reset is triggered because MES itself stopped responding, the timed-out packets advance sync_seq past the last hw fence value MES wrote. After resume the first MES submission polls forever on a seq that is never written back, failing the resume and wedging the box on a second reset: amdgpu: MES ring buffer is full. amdgpu: *ERROR* ring gfx_0.0.0 test failed (-110) amdgpu: resume of IP block <gfx_v11_0> failed -110 amdgpu: GPU reset end with ret = -110 Force complete the MES scheduler ring fences together with the scheduler rings so their hw fence is realigned to sync_seq. v2: cover all XCCs (one scheduler ring each), not just mes.ring[0].

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-16 11:16:46.380000

Last modified

2026-10-21 13:20:29.910000

View original CVE JSON

{
  "id": "CVE-2026-89812",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-16T11:16:46.380",
  "lastModified": "2026-10-21T13:20:29.910",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: force complete the MES ring fences on reset\n\nThe MES scheduler ring has no drm scheduler (no_scheduler = true), so it is\nskipped by the force-completion loop in amdgpu_device_pre_asic_reset(). It uses\na polling fence whose hw value lives in wb (GTT) memory and survives a MODE1\nreset, while fence_drv.sync_seq keeps advancing for every packet.\n\nWhen the reset is triggered because MES itself stopped responding, the\ntimed-out packets advance sync_seq past the last hw fence value MES wrote.\nAfter resume the first MES submission polls forever on a seq that is never\nwritten back, failing the resume and wedging the box on a second reset:\n\n  amdgpu: MES ring buffer is full.\n  amdgpu: *ERROR* ring gfx_0.0.0 test failed (-110)\n  amdgpu: resume of IP block <gfx_v11_0> failed -110\n  amdgpu: GPU reset end with ret = -110\n\nForce complete the MES scheduler ring fences together with the scheduler rings\nso their hw fence is realigned to sync_seq.\n\nv2: cover all XCCs (one scheduler ring each), not just mes.ring[0]."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "34e087e8920e635c62e2ed6a758b0cd27f836d13",
              "lessThan": "c48d5a4d2863e56a6692ecb6cd6c32404f40cd0f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "34e087e8920e635c62e2ed6a758b0cd27f836d13",
              "lessThan": "7d722821e2f626c4e34c8510f0ce1d6f10c77a3b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "34e087e8920e635c62e2ed6a758b0cd27f836d13",
              "lessThan": "ebe7542553d008e2285e0fbba0c63f0295a7e694",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "34e087e8920e635c62e2ed6a758b0cd27f836d13",
              "lessThan": "48dc279c3010ac8f91b1845b2abb3a1e9943a0f5",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.12",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.12",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.114",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.57",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.5",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/48dc279c3010ac8f91b1845b2abb3a1e9943a0f5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7d722821e2f626c4e34c8510f0ce1d6f10c77a3b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c48d5a4d2863e56a6692ecb6cd6c32404f40cd0f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ebe7542553d008e2285e0fbba0c63f0295a7e694",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}