{"id":"CVE-2021-27419","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-27419","generatedAt":"2026-10-27T22:26:15.130Z","title":"uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple.","description":"uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.","published":"2022-05-03T21:15:08.000Z","lastModified":"2026-06-17T03:44:49.000Z","status":"Modified","sourceIdentifier":"ics-cert@hq.dhs.gov","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-190"],"affected":["uclibc-ng project/uclibc-ng"],"epss":{"score":0.01721,"percentile":0.77325,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://downloads.uclibc-ng.org/releases/","tags":["Product","Release Notes","Vendor Advisory"],"source":"ics-cert@hq.dhs.gov"},{"url":"https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04","tags":["Third Party Advisory","US Government Resource"],"source":"ics-cert@hq.dhs.gov"},{"url":"https://downloads.uclibc-ng.org/releases/","tags":["Product","Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04","tags":["Third Party Advisory","US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-27419","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}