{"api_version":"1","generated_at":"2026-08-19T11:43:59+00:00","cve":"CVE-2026-58085","urls":{"html":"https://cve.report/CVE-2026-58085","api":"https://cve.report/api/cve/CVE-2026-58085.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-58085","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-58085"},"summary":{"title":"Missing MAC validation in wg(4) packet decryption","description":"After dispatching a decrypt operation to OCF and receiving the result, the wg(4) driver failed to check whether the MAC verification step succeeded.  The driver thus silently accepted packets with an invalid Poly1305 authentication tag.\n\nA remote attacker who can send UDP packets to a WireGuard endpoint, and who can guess the bounds of the receiver's replay window, can inject forged or modified transport data packets into the tunnel.\n\nA remote attacker who can intercept WireGuard packets bound for a FreeBSD host can modify the ciphertext and authenticated data without detection by the receiver.","state":"PUBLISHED","assigner":"freebsd","published_at":"2026-08-19 08:17:12","updated_at":"2026-08-19 08:17:12"},"problem_types":["CWE-347","CWE-347 CWE-347: Improper Verification of Cryptographic Signature"],"metrics":[],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:52.if_wg.asc","name":"https://security.freebsd.org/advisories/FreeBSD-SA-26:52.if_wg.asc","refsource":"secteam@freebsd.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58085","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58085","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"FreeBSD","product":"FreeBSD","version":"affected 15.1-RELEASE p2 release","platforms":[]},{"source":"CNA","vendor":"FreeBSD","product":"FreeBSD","version":"affected 15.0-RELEASE p12 release","platforms":[]},{"source":"CNA","vendor":"FreeBSD","product":"FreeBSD","version":"affected 14.4-RELEASE p8 release","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"Reo Shiseki","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unknown","modules":["if_wg"],"product":"FreeBSD","vendor":"FreeBSD","versions":[{"lessThan":"p2","status":"affected","version":"15.1-RELEASE","versionType":"release"},{"lessThan":"p12","status":"affected","version":"15.0-RELEASE","versionType":"release"},{"lessThan":"p8","status":"affected","version":"14.4-RELEASE","versionType":"release"}]}],"credits":[{"lang":"en","type":"finder","value":"Reo Shiseki"}],"datePublic":"2026-07-29T22:40:00.000Z","descriptions":[{"lang":"en","value":"After dispatching a decrypt operation to OCF and receiving the result, the wg(4) driver failed to check whether the MAC verification step succeeded.  The driver thus silently accepted packets with an invalid Poly1305 authentication tag.\n\nA remote attacker who can send UDP packets to a WireGuard endpoint, and who can guess the bounds of the receiver's replay window, can inject forged or modified transport data packets into the tunnel.\n\nA remote attacker who can intercept WireGuard packets bound for a FreeBSD host can modify the ciphertext and authenticated data without detection by the receiver."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-19T07:38:50.551Z","orgId":"63664ac6-956c-4cba-a5d0-f46076e16109","shortName":"freebsd"},"references":[{"tags":["vendor-advisory"],"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:52.if_wg.asc"}],"title":"Missing MAC validation in wg(4) packet decryption","x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"63664ac6-956c-4cba-a5d0-f46076e16109","assignerShortName":"freebsd","cveId":"CVE-2026-58085","datePublished":"2026-08-19T07:38:50.551Z","dateReserved":"2026-06-29T01:40:17.498Z","dateUpdated":"2026-08-19T07:38:50.551Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-19 08:17:12","lastModifiedDate":"2026-08-19 08:17:12","problem_types":["CWE-347","CWE-347 CWE-347: Improper Verification of Cryptographic Signature"],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"58085","Ordinal":"1","Title":"Missing MAC validation in wg(4) packet decryption","CVE":"CVE-2026-58085","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"58085","Ordinal":"1","NoteData":"After dispatching a decrypt operation to OCF and receiving the result, the wg(4) driver failed to check whether the MAC verification step succeeded.  The driver thus silently accepted packets with an invalid Poly1305 authentication tag.\n\nA remote attacker who can send UDP packets to a WireGuard endpoint, and who can guess the bounds of the receiver's replay window, can inject forged or modified transport data packets into the tunnel.\n\nA remote attacker who can intercept WireGuard packets bound for a FreeBSD host can modify the ciphertext and authenticated data without detection by the receiver.","Type":"Description","Title":"Missing MAC validation in wg(4) packet decryption"}]}}}