CVE-2026-75806 affecting package rust 1.96.1-2

{
  "id": "d13a267bdc148eaca9523ce5fa8397d836c945fef10694e1fcf7fc5047854ee1",
  "url": "https://osv.dev/vulnerability/AZL-105897",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-75806 affecting package rust 1.96.1-2",
    "summary": "Issue summary: An established DTLS 1.2 association using an AEAD cipher suite can be terminated by a single unauthenticated datagram whose encrypted fragment is shorter than the mandatory explicit IV and authentication tag overhead. Impact summary: An attacker who can send a datagram that is routed to an existing DTLS 1.2 association can tear that association down without knowing any key material. This is a Denial of Service limited to the targeted association. There is no memory safety or confidentiality impact. CWE: CWE-1284: Improper Validation of Specified Quantity in Input Description: In TLS 1.2 and DTLS 1.2 every record protected by an AEAD cipher suite carries an explicit IV followed by the ciphertext and an authentication tag. When decrypting such a record the record layer passed the record length to the cipher implementation before checking that the record was long enough to contain the explicit IV and the tag. For a record shorter than that overhead the cipher implementation rejected the impossible length, and the record layer treated this as an internal failure and raised a fatal internal_error alert instead of treating the record as one that failed authentication. In TLS 1.2 the same record causes a fatal internal_error alert instead of the expected bad_record_mac alert. Since any undecryptable record already terminates a TLS connection, this is a protocol conformance issue rather than a security issue in TLS. The fix validates the record length against the expli",
    "evidence": "osv:AZL-105897",
    "products": [
      {
        "name": {
          "value": "rust",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-105897",
      "aliases": [
        "AZL-105897"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "1.85.0"
                },
                {
                  "last_affected": "1.96.1-2"
                }
              ]
            }
          ],
          "package": {
            "name": "rust",
            "purl": "pkg:rpm/azure-linux/rust",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105897.json"
          }
        }
      ],
      "modified": "2026-10-15T05:37:09Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-75806"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-75806"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-75806",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 321397,
  "published_at": "2026-09-29T16:17:11+00:00"
}