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TI-2021-16787 Aliases CVE-2021-39519GHSA-856m-7gh9-83gw

An issue was discovered in libjpeg through 2020021.

Priority LOW 30CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

An issue was discovered in libjpeg through 2020021. A NULL pointer dereference exists in the function BlockBitmapRequester::PullQData() located in blockbitmaprequester.cpp It allows an attacker to cause Denial of Service.

Why it matters now

EPSS 0.00866 58th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:jpeg:libjpeg:*:*:*:*:*:*:*:*up to 2020021VulnerableJpeg
  • cpe:2.3:a:jpeg:libjpeg:*:*:*:*:*:*:*:* Versions up to 2020021 Vulnerable ·Jpeg

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-39519
  2. 2026-10-03 Alias added: GHSA-856m-7gh9-83gw

References

Exploit 1

  • TI-2023-19290 libjpeg commit db33a6e was discovered to contain a heap buffer overflow via… CVSS 3.1MEDIUM 6.5
  • TI-2023-19289 libjpeg commit db33a6e was discovered to contain a reachable assertion via… CVSS 3.1MEDIUM 6.5
  • TI-2022-17547 libjpeg commit 281daa9 was discovered to contain an infinite loop via the component Frame::ParseTrailer. CVSS 3.1HIGH 7.5
  • TI-2022-14492 There is an assertion failure in SingleComponentLSScan::ParseMCU in… CVSS 3.1MEDIUM 6.5
  • TI-2022-13689 libjpeg 1.63 has a heap-based buffer over-read in… CVSS 3.1MEDIUM 6.5
  • TI-2022-17549 libjpeg commit 281daa9 was discovered to contain a segmentation fault via… CVSS 3.1MEDIUM 6.5
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences