Radare2 up to 6.1.5 gdbr_pids_list use after free

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Radare2 up to 6.1.5. This affects the function gdbr_pids_list. This manipulation causes use after free. This vulnerability is tracked as CVE-2026-8696. The attack is possible to be carried out remotely. No exploit exists. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as critical was found in Radare2 up to 6.1.5. Affected by this vulnerability is the function gdbr_pids_list. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed by Saad Elharaj as 25836. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-8696 since 05/15/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 316402 (Linux Distros Unpatched Vulnerability : CVE-2026-8696), which helps to determine the existence of the flaw in a target environment.

Applying the patch c213ad6894a1eb9086ac8bf5fae35757e9e1683c is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (316402). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 8.1

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CNA Base Score: 7.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 316402
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-8696

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: c213ad6894a1eb9086ac8bf5fae35757e9e1683c

Timelineinfo

05/15/2026 CVE reserved
05/16/2026 +1 days Advisory disclosed
05/16/2026 +0 days VulDB entry created
05/24/2026 +8 days VulDB entry last update

Sourcesinfo

Advisory: 25836
Researcher: Saad Elharaj
Status: Confirmed

CVE: CVE-2026-8696 (🔒)
GCVE (CVE): GCVE-0-2026-8696
GCVE (VulDB): GCVE-100-364267

Entryinfo

Created: 05/16/2026 06:43
Updated: 05/24/2026 13:44
Changes: 05/16/2026 06:43 (79), 05/21/2026 11:03 (11), 05/24/2026 13:44 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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