CVE-2026-81879: 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…

PriorityP424medium6.1CVSS 3.1

AVLACLPRNUIRSUCLINAH

EPSS

0.18%

7.7th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
radare	radare2	< 6.2.0	6.2.0
radareorg	radare2	< 6.2.0	6.2.0

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