tftp-hpa 5.4 before 6.0 Out-of-Bounds Read via tftpd Remap Jump Rule

{
  "id": "f5f08e6f92e8b99c33e4e70da9760b218f17b87c33cc8fd8c81cfd68fc7be399",
  "url": "https://osv.dev/vulnerability/CVE-2026-106026",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "tftp-hpa 5.4 before 6.0 Out-of-Bounds Read via tftpd Remap Jump Rule",
    "summary": "tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.",
    "evidence": "osv:CVE-2026-106026",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-106026",
      "aliases": [
        "CVE-2026-106026"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c1b7ae1c54eafca0b2001e38172a207104171bcc"
                },
                {
                  "fixed": "a17da7d1f191394f15dbf10e5b27e2d73f10dcae"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "5.4"
                      },
                      {
                        "fixed": "6.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "5.4"
                      },
                      {
                        "fixed": "6.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "tftp-hpa-5.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106026.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.974365977Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106026.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-106026",
        "https://www.vulncheck.com/advisories/tftp-hpa-5.4-before-6.0-out-of-bounds-read-via-tftpd-remap-jump-rule",
        "https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/commit/?id=6735086fb6475c3e1f1daf9829836b3d06f14291",
        "https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git",
        "https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/tree/tftpd/remap.c?h=tftp-hpa-5.4#n762"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106026.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-106026",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491462,
  "published_at": "2026-10-06T13:35:48.642+00:00"
}