CVE-2026-53374 (GCVE-0-2026-53374)

Vulnerability from cvelistv5 – Published: 2026-07-19 10:01 – Updated: 2026-07-20 06:41
VLAI
Title
drm/amdgpu: zero-initialize GART table on allocation
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: zero-initialize GART table on allocation GART TLB is flushed after unmapping but not after mapping. Since amdgpu_bo_create_kernel() does not zero-initialize the buffer, when a single PTE is written the TLB may speculatively load other uninitialized entries from the same cacheline. Those garbage entries can appear valid, and a subsequent write to another PTE in the same cacheline may cause the GPU to use a stale garbage PTE from the TLB. Fix this by calling memset_io() to zero-initialize the GART table with gart_pte_flags immediately after allocation. Using AMDGPU_GEM_CREATE_VRAM_CLEARED, SDMA-based clear will not work since SDMA needs GART to be initialized to work. (cherry picked from commit d9af8263b82b6eaa60c5718e0c6631c5037e4b24)
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 40df11255d71b02e20e70579f1b12b687e396e26 (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 91fbb5e635c8fb1b49e15c19da06480089ef719f (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 8ae8b9e74bab94aab1d79f1688129bcc61c8b29a (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < b17175d0a375b3ed5e81597dac4983fdb46e478d (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 791941be5da125d9a1b228582bfdc300c05d05b3 (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < e6c2e6c2e1fa066968a16aca1cb66cd1bdde7741 (git)
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Linux Linux Affected: 4.2
Unaffected: 0 , < 4.2 (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.90 , ≤ 6.12.* (semver)
Unaffected: 6.18.32 , ≤ 6.18.* (semver)
Unaffected: 7.0.9 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: zero-initialize GART table on allocation\n\nGART TLB is flushed after unmapping but not after mapping. Since\namdgpu_bo_create_kernel() does not zero-initialize the buffer, when a\nsingle PTE is written the TLB may speculatively load other uninitialized\nentries from the same cacheline. Those garbage entries can appear valid,\nand a subsequent write to another PTE in the same cacheline may cause the\nGPU to use a stale garbage PTE from the TLB.\n\nFix this by calling memset_io() to zero-initialize the GART table with\ngart_pte_flags immediately after allocation.\n\nUsing AMDGPU_GEM_CREATE_VRAM_CLEARED, SDMA-based clear will not work\nsince SDMA needs GART to be initialized to work.\n\n(cherry picked from commit d9af8263b82b6eaa60c5718e0c6631c5037e4b24)"
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        "dateUpdated": "2026-07-20T06:41:16.761Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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  "cveMetadata": {
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    "cveId": "CVE-2026-53374",
    "datePublished": "2026-07-19T10:01:58.292Z",
    "dateReserved": "2026-06-09T07:44:35.401Z",
    "dateUpdated": "2026-07-20T06:41:16.761Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "microsoft_vex": {
      "current_release_date": "2026-07-20T01:02:39.000Z",
      "cve": "CVE-2026-53374",
      "id": "msrc_CVE-2026-53374",
      "initial_release_date": "2026-07-20T01:02:39.000Z",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "drm/amdgpu: zero-initialize GART table on allocation",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53374.json",
      "version": "1"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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