{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42512","assignerOrgId":"63664ac6-956c-4cba-a5d0-f46076e16109","state":"PUBLISHED","assignerShortName":"freebsd","dateReserved":"2026-04-28T05:31:44.956Z","datePublished":"2026-04-30T07:58:37.145Z","dateUpdated":"2026-05-01T15:26:06.292Z"},"containers":{"cna":{"datePublic":"2026-04-29T19:00:00.000Z","title":"Remotely triggerable out-of-bounds heap write in dhclient","references":[{"tags":["vendor-advisory"],"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:15.dhclient.asc"}],"affected":[{"defaultStatus":"unknown","modules":["dhclient"],"product":"FreeBSD","vendor":"FreeBSD","versions":[{"status":"affected","versionType":"release","version":"15.0-RELEASE","lessThan":"p7"},{"status":"affected","versionType":"release","version":"14.4-RELEASE","lessThan":"p3"},{"status":"affected","versionType":"release","version":"14.3-RELEASE","lessThan":"p12"},{"status":"affected","versionType":"release","version":"13.5-RELEASE","lessThan":"p13"}]}],"credits":[{"lang":"en","type":"finder","value":"Joshua Rogers of AISLE Research Team"}],"descriptions":[{"lang":"en","value":"As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers.  The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun.\n\nA specially crafted packet can cause dhclient to overrun its buffer of environment entries.  This can result in a crash, but it may be possible to leverage this bug to achieve remote code execution."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"63664ac6-956c-4cba-a5d0-f46076e16109","shortName":"freebsd","dateUpdated":"2026-04-30T07:58:37.145Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.1,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-05-01T03:55:53.107126Z","id":"CVE-2026-42512","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-01T15:26:06.292Z"}}]}}