{"id":"CVE-2026-81879","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-81879","generatedAt":"2026-10-28T04:35:23.208Z","title":"Prior to 6.2.0, radare2's ELF PN_XNUM handling was vulnerable because the ELF parser allocated the program-header array using the resolved PN_XNUM count but several consumers still iterated with the original e_phnum value of 65535.","description":"radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's ELF PN_XNUM handling was vulnerable because the ELF parser allocated the program-header array using the resolved PN_XNUM count but several consumers still iterated with the original e_phnum value of 65535. The vulnerability is triggered by processing a crafted ELF file with e_phnum = 0xffff and a much smaller resolved count in shdr[0].sh_info. Consumers iterated beyond the allocated program-header array. This can cause a heap out-of-bounds read and process termination, resulting in denial of service; memory disclosure and code execution have not been demonstrated. This issue is fixed in version 6.2.0.","published":"2026-09-22T16:18:03.000Z","lastModified":"2026-09-25T16:53:49.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},"cwe":["CWE-125"],"affected":["radare/radare2"],"epss":{"score":0.00182,"percentile":0.07724,"date":"2026-10-27","history":[{"date":"2026-09-23","score":0.00183,"percentile":0.08103}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-22T16:18:03.000Z","detail":{"score":"5.5","severity":"MEDIUM","publishedAt":"2026-09-22T16:18:02.617Z"},"summary":"New CVE, medium severity (CVSS 6.1)."}],"references":[{"url":"https://github.com/radareorg/radare2/commit/9449b07579c19b6b187c1a0918fbec2cef1a036e","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/issues/26223","tags":["Exploit","Issue Tracking","Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/pull/26178","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/releases/tag/6.2.0","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/security/advisories/GHSA-jqfq-hvcp-xh4p","tags":["Patch","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/issues/26223","tags":["Exploit","Issue Tracking","Mitigation","Vendor Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-81879","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."}