CVE-2021-29390
libjpeg-turbo: heap-buffer-overflow vulnerability in decompress_smooth_data in jdcoefct.c
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · August 22, 2023
Updated · November 21, 2025
Description
A heap buffer over-read flaw was found in libjpeg-turbo. For certain types of smoothed jpeg images, the decompress_smooth_data() function may improperly enter a condition statement that leads to heap memory read of uninitialized data, which may cause an application crash or loss of confidentiality.
Statement
The amount of memory read is very small and not controllable by an attacker, which lowers the impact of this flaw to Moderate.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
CWE-125 · Out-of-bounds Read