Vulnerability-Lookup

GHSA-J8G3-C5F3-W4QH

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/oa: Zero OA buffer at allocation

ttm_bo_type_kernel BOs are not guaranteed to be zeroed on allocation and may contain data from previously freed pages. Since the OA buffer is mmap'able by userspace, this can expose stale kernel memory contents.

Streams opened with DRM_XE_OA_PROPERTY_OA_DISABLED allocate the OA buffer without calling xe_oa_init_oa_buffer(). Zero the buffer at allocation to prevent information disclosure through mmap.

The existing zeroing in xe_oa_init_oa_buffer() remains necessary for zero report-id/timestamp detection on enable/re-enable.

(cherry picked from commit 126c4c5388f9311a390b9b254a835b0cf0f55331)

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{
  "affected": [],
  "aliases": [
    "CVE-2026-99208"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-28T11:17:42Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/oa: Zero OA buffer at allocation\n\nttm_bo_type_kernel BOs are not guaranteed to be zeroed on allocation and\nmay contain data from previously freed pages. Since the OA buffer is\nmmap\u0027able by userspace, this can expose stale kernel memory contents.\n\nStreams opened with DRM_XE_OA_PROPERTY_OA_DISABLED allocate the OA\nbuffer without calling xe_oa_init_oa_buffer(). Zero the buffer at\nallocation to prevent information disclosure through mmap.\n\nThe existing zeroing in xe_oa_init_oa_buffer() remains necessary for\nzero report-id/timestamp detection on enable/re-enable.\n\n(cherry picked from commit 126c4c5388f9311a390b9b254a835b0cf0f55331)",
  "id": "GHSA-j8g3-c5f3-w4qh",
  "modified": "2026-10-28T12:31:08Z",
  "published": "2026-10-28T12:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99208"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21f41b6daf0dbe2cdaaf9f54af6e23fd3c9190b9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd3e2918c247db631d88cdd704596d9d27e5513e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd8662823caa114a63f07222d2aa448f6ac5e864"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-99208 (GCVE-0-2026-99208)

Vulnerability from cvelistv5 – Published: 2026-10-28 10:36 – Updated: 2026-10-28 10:36

Title

drm/xe/oa: Zero OA buffer at allocation

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/xe/oa: Zero OA buffer at allocation ttm_bo_type_kernel BOs are not guaranteed to be zeroed on allocation and may contain data from previously freed pages. Since the OA buffer is mmap'able by userspace, this can expose stale kernel memory contents. Streams opened with DRM_XE_OA_PROPERTY_OA_DISABLED allocate the OA buffer without calling xe_oa_init_oa_buffer(). Zero the buffer at allocation to prevent information disclosure through mmap. The existing zeroing in xe_oa_init_oa_buffer() remains necessary for zero report-id/timestamp detection on enable/re-enable. (cherry picked from commit 126c4c5388f9311a390b9b254a835b0cf0f55331)

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

3 references

URL	Tags
https://git.kernel.org/stable/c/21f41b6daf0dbe2cd…
https://git.kernel.org/stable/c/cd3e2918c247db631…
https://git.kernel.org/stable/c/fd8662823caa114a6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 392bf22238ff88506f410c464ba0c7a84e9de471 , < 21f41b6daf0dbe2cdaaf9f54af6e23fd3c9190b9 (git) Affected: 392bf22238ff88506f410c464ba0c7a84e9de471 , < cd3e2918c247db631d88cdd704596d9d27e5513e (git) Affected: 392bf22238ff88506f410c464ba0c7a84e9de471 , < fd8662823caa114a63f07222d2aa448f6ac5e864 (git)
Linux	Linux	Affected: 6.11 Unaffected: 0 , < 6.11 (semver) Unaffected: 6.18.59 , ≤ 6.18.* (semver) Unaffected: 7.2.13 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_oa.c"
          ],
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          "vendor": "Linux",
          "versions": [
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            },
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              "version": "392bf22238ff88506f410c464ba0c7a84e9de471",
              "versionType": "git"
            },
            {
              "lessThan": "fd8662823caa114a63f07222d2aa448f6ac5e864",
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            }
          ]
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          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
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            },
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              "lessThanOrEqual": "7.2.*",
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              "version": "7.2.13",
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            },
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/oa: Zero OA buffer at allocation\n\nttm_bo_type_kernel BOs are not guaranteed to be zeroed on allocation and\nmay contain data from previously freed pages. Since the OA buffer is\nmmap\u0027able by userspace, this can expose stale kernel memory contents.\n\nStreams opened with DRM_XE_OA_PROPERTY_OA_DISABLED allocate the OA\nbuffer without calling xe_oa_init_oa_buffer(). Zero the buffer at\nallocation to prevent information disclosure through mmap.\n\nThe existing zeroing in xe_oa_init_oa_buffer() remains necessary for\nzero report-id/timestamp detection on enable/re-enable.\n\n(cherry picked from commit 126c4c5388f9311a390b9b254a835b0cf0f55331)"
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    "dateReserved": "2026-09-25T10:25:14.401Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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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