Vulnerability-Lookup

GHSA-F7M7-CGC5-XPX5

Vulnerability from github – Published: 2026-10-28 12:31 – Updated: 2026-10-28 12:31

Details

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)

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{
  "affected": [],
  "aliases": [
    "CVE-2026-99145"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-28T11:17:34Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Don\u0027t transfer shrinker pages for pinned bos on purgeable state change\n\nPinned bos have their pages removed from the shrinker\u0027s shrinkable /\npurgeable counts on pin, and added back on unpin according to the\nbo\u0027s 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)",
  "id": "GHSA-f7m7-cgc5-xpx5",
  "modified": "2026-10-28T12:31:05Z",
  "published": "2026-10-28T12:31:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99145"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/135e998dd1e66b8854db7bd356b6563baf8b9d51"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ffbfd3f98f4393e91dffce3a46ccb7cf5329cf2f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-99145 (GCVE-0-2026-99145)

Vulnerability from cvelistv5 – Published: 2026-10-28 10:35 – Updated: 2026-10-28 10:35

Title

drm/xe: Don't transfer shrinker pages for pinned bos on purgeable state change

Summary

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

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

2 references

URL	Tags
https://git.kernel.org/stable/c/135e998dd1e66b885…
https://git.kernel.org/stable/c/ffbfd3f98f4393e91…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 536a2ead3a8f2048643da3e8340a4d73fdf71903 , < 135e998dd1e66b8854db7bd356b6563baf8b9d51 (git) Affected: 536a2ead3a8f2048643da3e8340a4d73fdf71903 , < ffbfd3f98f4393e91dffce3a46ccb7cf5329cf2f (git)
Linux	Linux	Affected: 7.1 Unaffected: 0 , < 7.1 (semver) Unaffected: 7.2.13 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_bo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "135e998dd1e66b8854db7bd356b6563baf8b9d51",
              "status": "affected",
              "version": "536a2ead3a8f2048643da3e8340a4d73fdf71903",
              "versionType": "git"
            },
            {
              "lessThan": "ffbfd3f98f4393e91dffce3a46ccb7cf5329cf2f",
              "status": "affected",
              "version": "536a2ead3a8f2048643da3e8340a4d73fdf71903",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_bo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.1"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.13",
                  "versionStartIncluding": "7.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "7.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Don\u0027t transfer shrinker pages for pinned bos on purgeable state change\n\nPinned bos have their pages removed from the shrinker\u0027s shrinkable /\npurgeable counts on pin, and added back on unpin according to the\nbo\u0027s 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)"
        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-28T10:35:02.038Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/ffbfd3f98f4393e91dffce3a46ccb7cf5329cf2f"
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      ],
      "title": "drm/xe: Don\u0027t transfer shrinker pages for pinned bos on purgeable state change",
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  "cveMetadata": {
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    "cveId": "CVE-2026-99145",
    "datePublished": "2026-10-28T10:35:02.038Z",
    "dateReserved": "2026-09-25T10:25:14.396Z",
    "dateUpdated": "2026-10-28T10:35:02.038Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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