Vulnerability · Published May 15, 2026 · Assigned by VulnCheck

CVE-2026-8696radare2 6.1.5 Use-After-Free via gdbr_pids_list()

High 7.5

In plain English

A high-severity use-after-free in radare2 from radare2. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 51.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Ubuntu:25.10	radare2	no fix listed	UBUNTU-CVE-2026-8696
Ubuntu:26.04:LTS	radare2	no fix listed	UBUNTU-CVE-2026-8696
Ubuntu:26.10	radare2	no fix listed	UBUNTU-CVE-2026-8696

Affected products (as reported)

Vendor	Product	Versions
radare2	radare2	6.1.5

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/radareorg/radare2/issues/25836 issue-tracking
https://github.com/radareorg/radare2/commit/c213ad6894a1eb9086ac8bf5fae35757e9e1683c patch
https://www.vulncheck.com/advisories/radare2-use-after-free-via-gdbr-pids-list third-party-advisory