CVE-2026-81879 (GCVE-0-2026-81879)

Vulnerability from cvelistv5 – Published: 2026-09-22 15:09 – Updated: 2026-09-22 15:38
VLAI
Title
radare2: Heap out-of-bounds read in radare2 ELF PN_XNUM handling
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 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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 15:38 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
radareorg radare2 Affected: < 6.2.0
guessed Create a notification for this product.
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