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.
Metrics
Affected Vendors & Products
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History
Fri, 25 Sep 2026 17:00:00 +0000
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Radare
Radare radare2 |
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| CPEs | cpe:2.3:a:radare:radare2:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Radare
Radare radare2 |
Wed, 23 Sep 2026 15:30:00 +0000
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ssvc
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Tue, 22 Sep 2026 16:45:00 +0000
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Radareorg
Radareorg radare2 |
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| Vendors & Products |
Radareorg
Radareorg radare2 |
Tue, 22 Sep 2026 15:15:00 +0000
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| 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. | |
| Title | radare2: Heap out-of-bounds read in radare2 ELF PN_XNUM handling | |
| Weaknesses | CWE-125 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-22T15:09:01.910Z
Updated: 2026-09-22T15:38:46.170Z
Reserved: 2026-08-27T17:48:42.122Z
Link: CVE-2026-81879
Updated: 2026-09-22T15:38:41.283Z
Status : Analyzed
Published: 2026-09-22T16:18:02.617
Modified: 2026-09-25T16:53:48.707
Link: CVE-2026-81879
No data.