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TI-2026-56492 Aliases CVE-2026-81881

radare2: Heap out-of-bounds read in radare2 Mach-O Swift metadata parser

Priority LOW 20CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Mach-O Swift field-metadata parser was vulnerable because a relative Swift field pointer could be lower than the field-metadata section base, making subtraction produce a negative logical index. The vulnerability is triggered by parsing Swift type and class metadata from a crafted Mach-O file. The derived index was used to read four bytes immediately before the allocated field-metadata buffer. This can cause incorrect metadata processing or process termination; no attacker-observable memory disclosure has been demonstrated. This issue is fixed in version 6.2.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00167 6th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed radare2 (radareorg): 6.2.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
radareorgradare2before 6.2.06.2.0Patch availableCNA
  • radare2 Vendorradareorg Affected before 6.2.0 Fixed in 6.2.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:radare:radare2:*:*:*:*:*:*:*:*before 6.2.0Vulnerableradareorg
  • cpe:2.3:a:radare:radare2:*:*:*:*:*:*:*:* Versions before 6.2.0 Vulnerable ·radareorg

Remediation

  • Fix · CNA radare2 (radareorg) Fixed in 6.2.0

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-81881

References

Exploit 1

Patch 2

Other 1

  • TI-2023-25089 An out-of-bounds read in radare2 v.5.8.9 and before exists in the print_insn32 function… CVSS 3.1CRITICAL 9.8
  • TI-2023-25088 An out-of-bounds read in radare2 v.5.8.9 and before exists in the print_insn32_fpu… CVSS 3.1CRITICAL 9.8
  • TI-2021-12172 Radare2 has a division by zero vulnerability in Mach-O parser's rebase_buffer function. CVSS 3.1CRITICAL 10.0
  • TI-2026-07640 radare2 6.1.5 Use-After-Free via gdbr_pids_list() CVSS 4.0HIGH 8.7
  • TI-2026-07639 radare2 6.1.5 Use-After-Free via gdbr_threads_list() CVSS 4.0HIGH 8.7
  • TI-2023-03993 Heap-based Buffer Overflow in radareorg/radare2 CVSS 3.1CRITICAL 9.8
See all 178 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences