CVE-2020-37239

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-16. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.8
EG Score
9.8(medium)
EPSS
36.9%
KEV
Not listed

Published

May 16, 2026

Last Modified

May 18, 2026

Advisory Details (4)

Auto-updated Jun 21, 2026
No patch confirmed yet.
generic

libbabl 0.1.62 Broken Double Free Detection Memory Safety | Advisories | VulnCheck

https://www.vulncheck.com/advisories/libbabl-broken-double-free-detection-memory-safety
generic

babl

https://www.gegl.org/babl/
generic

GEGL

https://www.gegl.org
generic🟡 PoC Available

libbabl 0.1.62 - Broken Double Free Detection (PoC) - Linux local Exploit

https://www.exploit-db.com/exploits/49259

Vendor Advisories for CVE-2020-37239(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 86× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 361 total refreshes for this CVE.

  1. 2026-07-15 16:55 UTCEPSS rescore
  2. 2026-07-15 16:55 UTCEPSS rescore
  3. 2026-07-15 01:57 UTCEPSS rescore
  4. 2026-07-13 22:27 UTCEPSS rescore
  5. 2026-07-13 22:27 UTCEPSS rescore
  6. 2026-07-13 06:10 UTCEPSS rescore
  7. 2026-07-13 06:10 UTCEPSS rescore
  8. 2026-07-12 05:44 UTCEPSS rescore
  9. 2026-07-11 08:25 UTCEPSS rescore
  10. 2026-07-11 08:25 UTCEPSS rescore
  11. 2026-07-09 19:07 UTCEPSS rescore
  12. 2026-07-08 15:12 UTCEPSS rescore
  13. 2026-07-07 13:43 UTCEPSS rescore
  14. 2026-07-06 16:25 UTCEPSS rescore
  15. 2026-07-06 16:25 UTCEPSS rescore
  16. 2026-07-06 02:21 UTCEPSS rescore
  17. 2026-07-06 02:21 UTCEPSS rescore
  18. 2026-07-04 06:29 UTCEPSS rescore
  19. 2026-07-04 06:29 UTCEPSS rescore
  20. 2026-06-30 23:20 UTCEPSS rescore
  21. 2026-06-30 23:20 UTCEPSS rescore
  22. 2026-06-29 21:19 UTCEG score recompute
  23. 2026-06-29 21:19 UTCGHSA enrichment
  24. 2026-06-29 14:04 UTCEPSS rescore
  25. 2026-06-28 12:32 UTCEG score recompute
Show 75 more
  1. 2026-06-28 12:32 UTCGHSA enrichment
  2. 2026-06-28 08:48 UTCEG score recompute
  3. 2026-06-28 08:47 UTCGHSA enrichment
  4. 2026-06-28 05:07 UTCEG score recompute
  5. 2026-06-28 05:07 UTCGHSA enrichment
  6. 2026-06-28 04:54 UTCEPSS rescore
  7. 2026-06-28 04:54 UTCEPSS rescore
  8. 2026-06-28 01:25 UTCEG score recompute
  9. 2026-06-28 01:25 UTCGHSA enrichment
  10. 2026-06-27 21:43 UTCEG score recompute
  11. 2026-06-27 21:43 UTCGHSA enrichment
  12. 2026-06-27 12:53 UTCEG score recompute
  13. 2026-06-27 12:53 UTCGHSA enrichment
  14. 2026-06-27 07:45 UTCEG score recompute
  15. 2026-06-27 07:45 UTCGHSA enrichment
  16. 2026-06-27 03:06 UTCEPSS rescore
  17. 2026-06-27 03:06 UTCEPSS rescore
  18. 2026-06-26 20:03 UTCEG score recompute
  19. 2026-06-26 20:03 UTCGHSA enrichment
  20. 2026-06-26 03:53 UTCEG score recompute
  21. 2026-06-26 03:53 UTCGHSA enrichment
  22. 2026-06-25 23:20 UTCEG score recompute
  23. 2026-06-25 23:20 UTCGHSA enrichment
  24. 2026-06-25 18:38 UTCEG score recompute
  25. 2026-06-25 18:38 UTCGHSA enrichment
  26. 2026-06-25 13:48 UTCEPSS rescore
  27. 2026-06-24 14:03 UTCEPSS rescore
  28. 2026-06-24 14:03 UTCEPSS rescore
  29. 2026-06-23 21:31 UTCEPSS rescore
  30. 2026-06-23 21:31 UTCEPSS rescore
  31. 2026-06-22 14:23 UTCEPSS rescore
  32. 2026-06-22 14:23 UTCEPSS rescore
  33. 2026-06-21 14:54 UTCEPSS rescore
  34. 2026-06-21 14:54 UTCEPSS rescore
  35. 2026-06-21 01:57 UTCEPSS rescore
  36. 2026-06-19 19:24 UTCEPSS rescore
  37. 2026-06-19 19:23 UTCEPSS rescore
  38. 2026-06-18 17:50 UTCEPSS rescore
  39. 2026-06-18 17:50 UTCEPSS rescore
  40. 2026-06-18 03:52 UTCEG score recompute
  41. 2026-06-18 03:52 UTCGHSA enrichment
  42. 2026-06-17 23:57 UTCEG score recompute
  43. 2026-06-17 23:57 UTCGHSA enrichment
  44. 2026-06-17 20:15 UTCEG score recompute
  45. 2026-06-17 20:15 UTCGHSA enrichment
  46. 2026-06-17 17:50 UTCEPSS rescore
  47. 2026-06-17 13:19 UTCEG score recompute
  48. 2026-06-17 13:19 UTCGHSA enrichment
  49. 2026-06-17 05:07 UTCEG score recompute
  50. 2026-06-17 05:06 UTCGHSA enrichment
  51. 2026-06-17 01:26 UTCEG score recompute
  52. 2026-06-17 01:26 UTCGHSA enrichment
  53. 2026-06-16 21:46 UTCEG score recompute
  54. 2026-06-16 21:46 UTCGHSA enrichment
  55. 2026-06-16 17:50 UTCEPSS rescore
  56. 2026-06-16 11:00 UTCEG score recompute
  57. 2026-06-16 11:00 UTCGHSA enrichment
  58. 2026-06-16 06:45 UTCEG score recompute
  59. 2026-06-16 06:45 UTCGHSA enrichment
  60. 2026-06-16 03:04 UTCEG score recompute
  61. 2026-06-16 03:04 UTCGHSA enrichment
  62. 2026-06-15 23:24 UTCEG score recompute
  63. 2026-06-15 23:24 UTCGHSA enrichment
  64. 2026-06-15 17:46 UTCEPSS rescore
  65. 2026-06-15 05:28 UTCEG score recompute
  66. 2026-06-15 05:28 UTCGHSA enrichment
  67. 2026-06-15 01:48 UTCEG score recompute
  68. 2026-06-15 01:48 UTCGHSA enrichment
  69. 2026-06-14 23:15 UTCEPSS rescore
  70. 2026-06-14 22:08 UTCEG score recompute
  71. 2026-06-14 22:08 UTCGHSA enrichment
  72. 2026-06-14 18:26 UTCEG score recompute
  73. 2026-06-14 18:26 UTCGHSA enrichment
  74. 2026-06-14 14:19 UTCEG score recompute
  75. 2026-06-14 14:19 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-37239?
CVE-2020-37239 is a critical vulnerability published on May 16, 2026. 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…
When was CVE-2020-37239 disclosed?
CVE-2020-37239 was first published in the National Vulnerability Database on May 16, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-37239 actively exploited?
CVE-2020-37239 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 36.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-37239?
CVE-2020-37239 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-37239?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-37239, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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