CVE-2026-99145

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe: Don't transfer shrinker pages for pinned bos on purgeable state change Pinned bos have their pages removed from the shrinker's shrinkable / purgeable counts on pin, and added back on unpin according to the bo's purgeable state at that time. However, xe_bo_set_purgeable_shrinker() unconditionally transfers pages between the shrinkable and purgeable counts. If the purgeable state of a pinned bo changes, for example by userspace madvising DONTNEED on a VMA of a bo that is also pinned as a scanout buffer, this underflows one count and, after unpin, leaves the other one permanently inflated. Only update the purgeable flag for pinned bos, and leave the page accounting to unpin. (cherry picked from commit afe6bc012034123fd838328668e609bf57e46bd3)

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

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

Published

2026-10-28 11:17:34.547000

Last modified

2026-10-28 11:17:34.547000

View original CVE JSON

{
  "id": "CVE-2026-99145",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-28T11:17:34.547",
  "lastModified": "2026-10-28T11:17:34.547",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Don't transfer shrinker pages for pinned bos on purgeable state change\n\nPinned bos have their pages removed from the shrinker's shrinkable /\npurgeable counts on pin, and added back on unpin according to the\nbo's purgeable state at that time.\n\nHowever, xe_bo_set_purgeable_shrinker() unconditionally transfers\npages between the shrinkable and purgeable counts. If the purgeable\nstate of a pinned bo changes, for example by userspace madvising\nDONTNEED on a VMA of a bo that is also pinned as a scanout buffer,\nthis underflows one count and, after unpin, leaves the other one\npermanently inflated.\n\nOnly update the purgeable flag for pinned bos, and leave the page\naccounting to unpin.\n\n(cherry picked from commit afe6bc012034123fd838328668e609bf57e46bd3)"
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_bo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "536a2ead3a8f2048643da3e8340a4d73fdf71903",
              "lessThan": "135e998dd1e66b8854db7bd356b6563baf8b9d51",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "536a2ead3a8f2048643da3e8340a4d73fdf71903",
              "lessThan": "ffbfd3f98f4393e91dffce3a46ccb7cf5329cf2f",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_bo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "7.1",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "7.1",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.13",
              "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/135e998dd1e66b8854db7bd356b6563baf8b9d51",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ffbfd3f98f4393e91dffce3a46ccb7cf5329cf2f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}