CVE-2022-49563 (GCVE-0-2022-49563)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:23 – Updated: 2026-08-05 08:55
VLAI
Title
crypto: qat - add param check for RSA
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: qat - add param check for RSA Reject requests with a source buffer that is bigger than the size of the key. This is to prevent a possible integer underflow that might happen when copying the source scatterlist into a linear buffer.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:37 UTC
CWE
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6653 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a990532023b903b10cf14736241cdd138e4bc92c , < 4d6d2adce08788b7667a6e58002682ea1bbf6a79 (git)
Affected: a990532023b903b10cf14736241cdd138e4bc92c , < f993321e50ba7a8ba4f5b19939e1772a921a1c42 (git)
Affected: a990532023b903b10cf14736241cdd138e4bc92c , < 9714061423b8b24b8afb31b8eb4df977c63f19c4 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.3
Unaffected: 0 , < 4.3 (semver)
Unaffected: 5.15.58 , ≤ 5.15.* (semver)
Unaffected: 5.18.15 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.58",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.18.15",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.19",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qat - add param check for RSA\n\nReject requests with a source buffer that is bigger than the size of the\nkey. This is to prevent a possible integer underflow that might happen\nwhen copying the source scatterlist into a linear buffer."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The vulnerable qat-rsa encrypt/decrypt paths are reached through the local kernel crypto API (KEYCTL_PKEY_ENCRYPT/DECRYPT selecting \"rsa\"/qat-rsa). This is not reachable via network packet processing.\nAC:L - The underflow is deterministic once an RSA request is issued with src_len greater than key_sz; the attacker controls both the length and the contents written out of bounds via scatterwalk_map_and_copy.\nPR:L - Unprivileged local users can create asymmetric keys and invoke KEYCTL_PKEY_* operations; when Intel QAT is present, qat-rsa registers as \"rsa\" at priority 1000 and is preferred over software RSA.\nUI:N - Exploitation requires only local syscalls to load an RSA key and submit an encrypt/decrypt request; no victim interaction is needed.\nS:U - This is standard kernel heap memory corruption within the same privilege boundary, not a VM/IOMMU escape or other cross-authority impact.\nC:H - The integer underflow produces a heap out-of-bounds write of attacker-controlled length and content, which can be leveraged for arbitrary kernel memory read primitives.\nI:H - Attacker-controlled heap overflow in the QAT RSA request path can corrupt adjacent kernel objects and enable arbitrary write or control-flow hijacking.\nA:H - The same heap corruption can reliably cause kernel oops/panic or otherwise deny service even without a full privilege-escalation exploit."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T08:55:47.255Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/4d6d2adce08788b7667a6e58002682ea1bbf6a79"
            },
            {
              "url": "https://git.kernel.org/stable/c/f993321e50ba7a8ba4f5b19939e1772a921a1c42"
            },
            {
              "url": "https://git.kernel.org/stable/c/9714061423b8b24b8afb31b8eb4df977c63f19c4"
            }
          ],
          "title": "crypto: qat - add param check for RSA",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49563",
        "datePublished": "2025-02-26T02:23:10.252Z",
        "dateReserved": "2025-02-26T02:08:31.591Z",
        "dateUpdated": "2026-08-05T08:55:47.255Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

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

Sightings and recorded dates, grouped by day · UTC

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