CVE-2026-81879
mediumradare2 is a UNIX-like reverse engineering framework and command-line toolset.
Vendor / product: Radare — radare2
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/radareorg/radare2/commit/9449b07579c19b6b187c1a0918fbec2cef1a036e security-advisories@github.com
- https://github.com/radareorg/radare2/issues/26223 security-advisories@github.com
- https://github.com/radareorg/radare2/pull/26178 security-advisories@github.com
- https://github.com/radareorg/radare2/releases/tag/6.2.0 security-advisories@github.com
- https://github.com/radareorg/radare2/security/advisories/GHSA-jqfq-hvcp-xh4p security-advisories@github.com
- https://github.com/radareorg/radare2/issues/26223 134c704f-9b21-4f2e-91b3-4a467353bcc0