CVE-2021-4460 (GCVE-0-2021-4460)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:45 – Updated: 2026-05-11 13:44
VLAI
Title
drm/amdkfd: Fix UBSAN shift-out-of-bounds warning
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix UBSAN shift-out-of-bounds warning If get_num_sdma_queues or get_num_xgmi_sdma_queues is 0, we end up doing a shift operation where the number of bits shifted equals number of bits in the operand. This behaviour is undefined. Set num_sdma_queues or num_xgmi_sdma_queues to ULLONG_MAX, if the count is >= number of bits in the operand. Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1472
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4a488a7ad71401169cecee75dc94bcce642e2c53 , < 0c0356ef2498c1a250fe3846f30293f828737309 (git)
Affected: 4a488a7ad71401169cecee75dc94bcce642e2c53 , < 1874b0ef1426b873de94c61861e38f29a8df714c (git)
Affected: 4a488a7ad71401169cecee75dc94bcce642e2c53 , < 3fdc5182700910a685d23df57d65166e8556a266 (git)
Affected: 4a488a7ad71401169cecee75dc94bcce642e2c53 , < 9069b1b542de8f3bbffef868aff41521b21485cf (git)
Affected: 4a488a7ad71401169cecee75dc94bcce642e2c53 , < 50e2fc36e72d4ad672032ebf646cecb48656efe0 (git)
Create a notification for this product.
Linux Linux Affected: 3.19
Unaffected: 0 , < 3.19 (semver)
Unaffected: 5.4.118 , ≤ 5.4.* (semver)
Unaffected: 5.10.36 , ≤ 5.10.* (semver)
Unaffected: 5.11.20 , ≤ 5.11.* (semver)
Unaffected: 5.12.3 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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This behaviour is undefined.\\n\\nSet num_sdma_queues or num_xgmi_sdma_queues to ULLONG_MAX, if the\\ncount is \u003e= number of bits in the operand.\\n\\nBug: https://gitlab.freedesktop.org/drm/amd/-/issues/1472\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.118\", \"versionStartIncluding\": \"3.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.36\", \"versionStartIncluding\": \"3.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.11.20\", \"versionStartIncluding\": \"3.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.3\", \"versionStartIncluding\": \"3.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"3.19\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-12-20T08:50:43.244Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-4460\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-14T17:42:45.892Z\", \"dateReserved\": \"2025-10-01T11:38:13.842Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-10-01T11:45:19.050Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





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.

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.


Detection rules are retrieved from Rulezet.