{"api_version":"1","generated_at":"2026-06-27T18:33:36+00:00","cve":"CVE-2026-49416","urls":{"html":"https://cve.report/CVE-2026-49416","api":"https://cve.report/api/cve/CVE-2026-49416.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-49416","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-49416"},"summary":{"title":"Integer overflow in vt(4) CONS_HISTORY ioctl","description":"The CONS_HISTORY ioctl handler did not adequately validate the requested history size.  A large value caused an integer overflow in the buffer size calculation, resulting in a heap allocation smaller than expected.  Subsequent initialization of the buffer wrote beyond the end of the allocation.\n\nAn unprivileged local user with access to a vt(4) device can trigger an out-of-bounds write in the kernel, potentially escalating privileges.","state":"PUBLISHED","assigner":"freebsd","published_at":"2026-06-27 10:16:38","updated_at":"2026-06-27 10:16:38"},"problem_types":["CWE-190","CWE-190 CWE-190: Integer Overflow or Wraparound"],"metrics":[],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:34.vt.asc","name":"https://security.freebsd.org/advisories/FreeBSD-SA-26:34.vt.asc","refsource":"secteam@freebsd.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-49416","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49416","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"FreeBSD","product":"FreeBSD","version":"affected 15.0-RELEASE p10 release","platforms":[]},{"source":"CNA","vendor":"FreeBSD","product":"FreeBSD","version":"affected 14.4-RELEASE p6 release","platforms":[]},{"source":"CNA","vendor":"FreeBSD","product":"FreeBSD","version":"affected 14.3-RELEASE p15 release","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"Ed Maste","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unknown","modules":["vt"],"product":"FreeBSD","vendor":"FreeBSD","versions":[{"lessThan":"p10","status":"affected","version":"15.0-RELEASE","versionType":"release"},{"lessThan":"p6","status":"affected","version":"14.4-RELEASE","versionType":"release"},{"lessThan":"p15","status":"affected","version":"14.3-RELEASE","versionType":"release"}]}],"credits":[{"lang":"en","type":"finder","value":"Ed Maste"}],"datePublic":"2026-06-09T23:30:00.000Z","descriptions":[{"lang":"en","value":"The CONS_HISTORY ioctl handler did not adequately validate the requested history size.  A large value caused an integer overflow in the buffer size calculation, resulting in a heap allocation smaller than expected.  Subsequent initialization of the buffer wrote beyond the end of the allocation.\n\nAn unprivileged local user with access to a vt(4) device can trigger an out-of-bounds write in the kernel, potentially escalating privileges."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-27T09:25:12.443Z","orgId":"63664ac6-956c-4cba-a5d0-f46076e16109","shortName":"freebsd"},"references":[{"tags":["vendor-advisory"],"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:34.vt.asc"}],"title":"Integer overflow in vt(4) CONS_HISTORY ioctl","x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"63664ac6-956c-4cba-a5d0-f46076e16109","assignerShortName":"freebsd","cveId":"CVE-2026-49416","datePublished":"2026-06-27T09:25:12.443Z","dateReserved":"2026-05-29T20:24:28.615Z","dateUpdated":"2026-06-27T09:25:12.443Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-27 10:16:38","lastModifiedDate":"2026-06-27 10:16:38","problem_types":["CWE-190","CWE-190 CWE-190: Integer Overflow or Wraparound"],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"49416","Ordinal":"1","Title":"Integer overflow in vt(4) CONS_HISTORY ioctl","CVE":"CVE-2026-49416","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"49416","Ordinal":"1","NoteData":"The CONS_HISTORY ioctl handler did not adequately validate the requested history size.  A large value caused an integer overflow in the buffer size calculation, resulting in a heap allocation smaller than expected.  Subsequent initialization of the buffer wrote beyond the end of the allocation.\n\nAn unprivileged local user with access to a vt(4) device can trigger an out-of-bounds write in the kernel, potentially escalating privileges.","Type":"Description","Title":"Integer overflow in vt(4) CONS_HISTORY ioctl"}]}}}