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Vulnerability record · CVE-2026-8696 · published 15 May 2026

CVE-2026-8696: Radare2 use after free vulnerability

Radare · Radare2

radare2 6.1.5 contains a use-after-free vulnerability in the gdbr_pids_list() function within the GDB client core that allows remote attackers to cause a denial of service or potentially execute arbitrary code by sending malformed thread information responses. Attackers can trigger the vulnerability by causing qsThreadInfo to fail after qfThreadInfo successfully allocates RDebugPid structures, resulting in double-free memory corruption when the error path attempts to clean up the list.

8.7 CVSS 4.0 High EPSS 1.0% · top 37.8% CWE-416 · Use after free
8.7CVSS 4.0 base score
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

radare2 6.1.5 contains a use-after-free vulnerability in the gdbr_pids_list() function within the GDB client core that allows remote attackers to cause a denial of service or potentially execute arbitrary code by sending malformed thread information responses. Attackers can trigger the vulnerability by causing qsThreadInfo to fail after qfThreadInfo successfully allocates RDebugPid structures, resulting in double-free memory corruption when the error path attempts to clean up the list.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/radareorg/radare2/commit/c213ad6894a1eb9086ac8bf5fae35757e9e1683c Patch
https://github.com/radareorg/radare2/issues/25836 ExploitIssue Tracking
https://www.vulncheck.com/advisories/radare2-use-after-free-via-gdbr-pids-list Third Party Advisory
https://github.com/radareorg/radare2/issues/25836 ExploitIssue Tracking

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2025-1864Radare2 memory buffer overflow vulnerabilityImproper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in radareorg radare2 allows Overflow Buffers.This issue affects…EPSS 0.48%10.0CVE-2025-1744Radare2 out-of-bounds write vulnerabilityOut-of-bounds Write vulnerability in radareorg radare2 allows heap-based buffer over-read or buffer overflow.This issue affects radare2: before <5.9.…EPSS 0.51%9.8CVE-2024-29646Radare2 classic buffer overflow vulnerabilityBuffer Overflow vulnerability in radarorg radare2 v.5.8.8 allows an attacker to execute arbitrary code via the name, type, or group fields.EPSS 0.92%9.8CVE-2023-46569Radare2 out-of-bounds read vulnerabilityAn out-of-bounds read in radare2 v.5.8.9 and before exists in the print_insn32_fpu function of libr/arch/p/nds32/nds32-dis.h.EPSS 0.92%9.8CVE-2023-46570Radare2 out-of-bounds read vulnerabilityAn out-of-bounds read in radare2 v.5.8.9 and before exists in the print_insn32 function of libr/arch/p/nds32/nds32-dis.h.EPSS 0.90%9.8CVE-2023-4322Radare2 heap-based buffer overflow vulnerabilityHeap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.9.0.EPSS 0.95%9.8CVE-2022-0559Radare2 use after free vulnerabilityUse After Free in GitHub repository radareorg/radare2 prior to 5.6.2.EPSS 1.3%9.8CVE-2022-0139Radare2 use after free vulnerabilityUse After Free in GitHub repository radareorg/radare2 prior to 5.6.0.EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2026-8696), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.