CVE-2026-8695: radare2 6.1.5 Use-After-Free via gdbr_threads_list()

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-05-15 · updated 2026-06-17
Weakness: CWE-416

Description

radare2 6.1.5 contains a use-after-free vulnerability in the gdbr_threads_list() function that allows remote attackers to trigger memory corruption by sending a valid qfThreadInfo response followed by a malformed qsThreadInfo response. Attackers can exploit this vulnerability through GDB remote debugging to cause a denial of service or potentially achieve code execution by manipulating thread list processing.

Affected products

radareorg/radare2: through 6.1.4

References

https://github.com/radareorg/radare2/commit/c213ad6894a1eb9086ac8bf5fae35757e9e1683c
https://github.com/radareorg/radare2/issues/25835
https://github.com/radareorg/radare2/issues/25836
https://www.vulncheck.com/advisories/radare2-use-after-free-via-gdbr-threads-list
https://github.com/radareorg/radare2/issues/25835

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