{"id":"CVE-2026-81879","title":"radare2 is a UNIX-like reverse engineering framework and command-line toolset","summary":"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 s…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"vendor":"radareorg","product":"radare2","affected":["radare2 < 6.2.0"],"published":"2026-09-22","updated":"2026-09-23","sourceUpdated":"2026-09-23T18:21:42.327","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81879","references":[{"url":"https://github.com/radareorg/radare2/commit/9449b07579c19b6b187c1a0918fbec2cef1a036e","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/issues/26223","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/pull/26178","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/releases/tag/6.2.0","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/security/advisories/GHSA-jqfq-hvcp-xh4p","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/issues/26223","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00183,"epssPercentile":0.08103,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-22T15:38:19.474912Z"},"ingestedAt":"2026-09-22T16:06:00.487Z","slug":"CVE-2026-81879","body":"## Overview\n\nradare2 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}