Read the docs
TI-2021-12172 Aliases CVE-2021-32494GHSA-v4qw-9ffj-jq3x

Radare2 has a division by zero vulnerability in Mach-O parser's rebase_buffer function.

Priority HIGH 82CWE-369Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-369.

Summary

Radare2 has a division by zero vulnerability in Mach-O parser's rebase_buffer function. This allow attackers to create malicious inputs that can cause denial of service.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00844 58th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
radareorgradare25.3.0-git 26142—No fix listedCNA
  • radare2 Vendorradareorg Affected 5.3.0-git 26142 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:radare:radare2:5.3.0:*:*:*:*:*:*:*5.3.0Vulnerableradareorg
  • cpe:2.3:a:radare:radare2:5.3.0:*:*:*:*:*:*:* Versions 5.3.0 Vulnerable ·radareorg

Remediation

No fixed version listed by the sources yet.

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-2021-32494
  2. 2026-10-03 Alias added: GHSA-v4qw-9ffj-jq3x

References

Exploit 1

Patch 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-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
  • TI-2026-29274 radare2 Command Injection via DWARF Parameter Names CVSS 4.0HIGH 8.5
See all 178 →

Sources

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