Medium 6.5Published May 25, 2023

CVE-2023-2804A heap-based buffer overflow issue was discovered in libjpeg-turbo in h2v2_merged_upsample_internal() function of jdmrgext.c file.

Updated under an hour ago (Nov 2, 2026, 12:23 AM ET)

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No exploitation reported and no EPSS estimate yet.

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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 attempting to decompress such image using merged upsampling would lead to segmentation fault or buffer overflows, causing an application to crash.

CVSS: 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-122, CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

libjpeg-turbo libjpeg-turbo libjpeg-turbo:libjpeg-turbo	2.1.90	NVD

References

References

https://access.redhat.com/security/cve/CVE-2023-2804	third-party-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2208447	issue-tracking, patch
https://github.com/libjpeg-turbo/libjpeg-turbo/commit/9f756bc67a84d4566bf74a0c2432aa55da404021	patch
https://github.com/libjpeg-turbo/libjpeg-turbo/issues/668#issuecomment-1492586118	exploit, issue-tracking, patch
https://github.com/libjpeg-turbo/libjpeg-turbo/issues/675	exploit, issue-tracking, patch
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01006.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.