Vulnerability details
CVE-2020-37239
Gegl libbabl
libbabl 0.1.62 Broken Double Free Detection Memory Safety
CVSS 4.0
9.3Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Gegl | libbabl | 0.1.62 | CVEProject cvelistV5 (CNA) |
References and advisories
4- https://www.exploit-db.com/exploits/49259 exploit
- https://www.gegl.org product
- https://www.gegl.org/babl/ product
- https://www.vulncheck.com/advisories/libbabl-broken-double-free-detection-memory-safety third-party-advisory
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Details
- Published
- 2026-05-16
- Last updated
- 2026-05-18
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.45%
Probability of exploitation in 30 days
39.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-415Double Free