CVE-2020-37239

CRITICAL 9.8

libbabl 0.1.62 Broken Double Free Detection Memory Safety

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

libbabl 0.1.62 contains a broken double free detection vulnerability that allows attackers to bypass memory safety checks by exploiting signature overwriting in freed chunks. Attackers can call babl_free() twice on the same pointer without triggering detection, as libc's malloc metadata overwrites babl's signature field upon freeing, enabling potential memory corruption and code execution.

CWE	CWE-415
Vendor	gegl
Product	libbabl
Published	May 16, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Gegl / libbabl

0.1.62

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/49259 gegl.org: https://www.gegl.org gegl.org: https://www.gegl.org/babl/ vulncheck.com: https://www.vulncheck.com/advisories/libbabl-broken-double-free-detection-memory-safety

Credits

Carter Yagemann