FKIE_CVE-2026-72313

Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-08-17 06:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/fb-helper: Only consider active CRTCs for vblank sync Only synchronize fbdev output to the vblank of an active CRTC. Go over the list of CRTCs and pick the first that matches. Fixes warnings as the one shown below [ 77.201354] WARNING: drivers/gpu/drm/drm_vblank.c:1320 at drm_crtc_wait_one_vblank+0x194/0x1cc [drm], CPU#1: kworker/1:7/1867 [ 77.201354] omapdrm omapdrm.0: [drm] vblank wait timed out on crtc 0 This currently happens if the fbdev output is not on CRTC 0. Atomic and non-atomic drivers require distinct code paths. As for other fbdev operations, implement both and select the correct one at runtime. Not finding an active CRTC is not a bug. Do not wait in this case, but flush the display update as before. v4: - avoid possible deadlocks with locking context (Sashiko) v3: - drop excessive state validation (Jani) - acquire plane and CRTC mutices (Sashiko) v2: - move look-up code into separate helper - support drivers with legacy modesetting v1: - see https://lore.kernel.org/dri-devel/1c9e0e24-9c4a-4259-8700-cf9e5fd60ca3@suse.de/
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/06c2b8d7ea2bcb014dd974fc3bc6d128d65d7477
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d84acf641afb68aa8efe40815ef43779ddb12fd
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/drm_fb_helper.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7d84acf641afb68aa8efe40815ef43779ddb12fd",
              "status": "affected",
              "version": "d8c4bddcd8bcb41885d3db2ba18c840c411564c2",
              "versionType": "git"
            },
            {
              "lessThan": "06c2b8d7ea2bcb014dd974fc3bc6d128d65d7477",
              "status": "affected",
              "version": "d8c4bddcd8bcb41885d3db2ba18c840c411564c2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/drm_fb_helper.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/fb-helper: Only consider active CRTCs for vblank sync\n\nOnly synchronize fbdev output to the vblank of an active CRTC. Go over\nthe list of CRTCs and pick the first that matches. Fixes warnings as\nthe one shown below\n\n[   77.201354] WARNING: drivers/gpu/drm/drm_vblank.c:1320 at drm_crtc_wait_one_vblank+0x194/0x1cc [drm], CPU#1: kworker/1:7/1867\n[   77.201354] omapdrm omapdrm.0: [drm] vblank wait timed out on crtc 0\n\nThis currently happens if the fbdev output is not on CRTC 0.\n\nAtomic and non-atomic drivers require distinct code paths. As for other\nfbdev operations, implement both and select the correct one at runtime.\n\nNot finding an active CRTC is not a bug. Do not wait in this case, but\nflush the display update as before.\n\nv4:\n- avoid possible deadlocks with locking context (Sashiko)\nv3:\n- drop excessive state validation (Jani)\n- acquire plane and CRTC mutices (Sashiko)\nv2:\n- move look-up code into separate helper\n- support drivers with legacy modesetting\nv1:\n- see https://lore.kernel.org/dri-devel/1c9e0e24-9c4a-4259-8700-cf9e5fd60ca3@suse.de/"
    }
  ],
  "id": "CVE-2026-72313",
  "lastModified": "2026-08-17T06:18:34.437",
  "metrics": {},
  "published": "2026-08-15T06:22:04.123",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/06c2b8d7ea2bcb014dd974fc3bc6d128d65d7477"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7d84acf641afb68aa8efe40815ef43779ddb12fd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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