CVE-2023-2804 — A heap-based buffer overflow issue was discovered in libjpeg-turbo in h2v2_merge

A heap-based buffer overflow issue was discovered in libjpeg-turbo in h2v2_merged_upsample_internal() function of jdmrgext.c file. The vulnerability can only be exploited with 12-bit data precision for which the range of the sample data type exceeds the valid sample range, hence,

01What is this vulnerability?

A heap-based buffer overflow issue was discovered in libjpeg-turbo in h2v2_merged_upsample_internal() function of jdmrgext.c file. The vulnerability can only be exploited with 12-bit data precision for which the range of the sample data type exceeds the valid sample range, hence, an attacker could craft a 12-bit lossless JPEG image that contains out-of-range 12-bit samples. An application…

02Affected products

Vendor	Product	Versions
n	a / libjpeg	turbo — Fixed in libjpeg-turbo v3.0 (beta2)

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-05-25T00:00:00.000Z
• Last modified: 2025-01-16T15:17:27.071Z

09References

• github.com — https://github.com/libjpeg-turbo/libjpeg-turbo/issues/675
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=2208447
• access.redhat.com — https://access.redhat.com/security/cve/CVE-2023-2804
• github.com — https://github.com/libjpeg-turbo/libjpeg-turbo/commit/9f756bc67a84d4566bf74a0c24…
• github.com — https://github.com/libjpeg-turbo/libjpeg-turbo/issues/668#issuecomment-149258611…
• www.intel.com — https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01006.…