libevent: Fix of 5 CVEs

{
  "id": "8c0c3b92e42377f0db27f27dc56b17f7d9d2f0fec2eb8efa453b20af982c786f",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1792537208",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "libevent: Fix of 5 CVEs",
    "summary": "- CVE-2026-63383: fix out-of-bounds read in decode_tag_internal - CVE-2026-63384: reject payload lengths above INT_MAX in evtag_unmarshal_header - CVE-2026-63387: fix off-by-one stack buffer overflow in dnsname_to_labels - CVE-2026-63385: reject HTTP header values containing CR or LF - CVE-2026-63382: reject ambiguous Transfer-Encoding/Content-Length headers and require CRLF in chunked framing",
    "evidence": "osv:CLSA-2026-1792537208",
    "products": [
      {
        "name": {
          "value": "libevent",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.0.21-4.el7.tuxcare.els2",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libevent-devel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.0.21-4.el7.tuxcare.els2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libevent-doc",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.0.21-4.el7.tuxcare.els2",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1792537208",
      "aliases": [
        "CLSA-2026-1792537208"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.0.21-4.el7.tuxcare.els2"
                }
              ]
            }
          ],
          "package": {
            "name": "libevent",
            "purl": "pkg:rpm/tuxcare/libevent?distro=oraclelinux-7",
            "ecosystem": "TuxCare:OracleLinux:7"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1792537208.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.0.21-4.el7.tuxcare.els2"
                }
              ]
            }
          ],
          "package": {
            "name": "libevent-devel",
            "purl": "pkg:rpm/tuxcare/libevent-devel?distro=oraclelinux-7",
            "ecosystem": "TuxCare:OracleLinux:7"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1792537208.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.0.21-4.el7.tuxcare.els2"
                }
              ]
            }
          ],
          "package": {
            "name": "libevent-doc",
            "purl": "pkg:rpm/tuxcare/libevent-doc?distro=oraclelinux-7",
            "ecosystem": "TuxCare:OracleLinux:7"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1792537208.json"
          }
        }
      ],
      "modified": "2026-10-26T09:43:29.931742472Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-63382",
        "CVE-2026-63383",
        "CVE-2026-63384",
        "CVE-2026-63385",
        "CVE-2026-63387"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/oraclelinux7els/CLSA-2026-1792537208.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63382",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63383",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63384",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63385",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63387"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-63382",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-63383",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-63384",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-63385",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-63387",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449949,
  "published_at": "2026-10-20T23:00:22+00:00"
}