{"id":"CVE-2026-49416","state":"PUBLISHED","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.","publishedAt":"2026-06-27T09:25:12.443Z","updatedAt":"2026-06-30T03:55:30.184Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"freebsd","products":["FreeBSD FreeBSD"],"affected":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","versions":[{"version":"15.0-RELEASE","status":"affected","lessThan":"p10","versionType":"release"},{"version":"14.4-RELEASE","status":"affected","lessThan":"p6","versionType":"release"},{"version":"14.3-RELEASE","status":"affected","lessThan":"p15","versionType":"release"}],"modules":["vt"]}],"references":["https://security.freebsd.org/advisories/FreeBSD-SA-26:34.vt.asc"],"weaknesses":["CWE-190"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49416.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49416","state":"PUBLISHED","datePublished":"2026-06-27T09:25:12.443Z","dateUpdated":"2026-06-30T03:55:30.184Z","assignerShortName":"freebsd","assignerOrgId":"63664ac6-956c-4cba-a5d0-f46076e16109","dateReserved":"2026-05-29T20:24:28.615Z"},"containers":{"cna":{"title":"Integer overflow in vt(4) CONS_HISTORY ioctl","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."}],"affected":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","versions":[{"version":"15.0-RELEASE","status":"affected","lessThan":"p10","versionType":"release"},{"version":"14.4-RELEASE","status":"affected","lessThan":"p6","versionType":"release"},{"version":"14.3-RELEASE","status":"affected","lessThan":"p15","versionType":"release"}],"modules":["vt"]}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:34.vt.asc","tags":["vendor-advisory"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"freebsd","orgId":"63664ac6-956c-4cba-a5d0-f46076e16109","dateUpdated":"2026-06-27T09:25:12.443Z"},"datePublic":"2026-06-09T23:30:00.000Z","credits":[{"lang":"en","type":"finder","value":"Ed Maste"}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-29T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-49416"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-30T03:55:30.184Z"}}]}}}