CVE-2020-37239
libbabl 0.1.62 Broken Double Free Detection Memory Safety
- State
- Published
- Severity
- 9.3 Critical
- Published
- May 16, 2026
- Updated
- May 18, 2026
- Reserved
- May 15, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-415 Double Free
Affected Products
| Product | Versions |
|---|---|
libbablGegl |
|
References
- ExploitDB-49259exploit
- Official Product Homepageproduct
- Product Referenceproduct
- VulnCheck Advisory: libbabl 0.1.62 Broken Double Free Detection Memory Safetythird-party-advisory
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