CVE-2021-29390 Memory corruption in n/a

High 7.1 Published 22 Aug 2023 Updated 4 Oct 2024

A heap-based buffer over-read in libjpeg-turbo allows attackers to cause denial of service or disclose sensitive memory contents via crafted images.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2021-29390?

CVE-2021-29390 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 22 Aug 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

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

Weakness: CWE-787

Which versions are affected by CVE-2021-29390?

It affects 2 products.

Linux distribution packages (19)

`libjpeg-turbo` AlmaLinux:9	All versions	`2.0.90-7.el9`
`libjpeg-turbo-devel` AlmaLinux:9	All versions	`2.0.90-7.el9`
`libjpeg-turbo-utils` AlmaLinux:9	All versions	`2.0.90-7.el9`
`turbojpeg` AlmaLinux:9	All versions	`2.0.90-7.el9`
`turbojpeg-devel` AlmaLinux:9	All versions	`2.0.90-7.el9`
`libjpeg-turbo` Red Hat:enterprise_linux:9::appstream	All versions	`0:2.0.90-7.el9`
`libjpeg-turbo-debuginfo` Red Hat:enterprise_linux:9::appstream	All versions	`0:2.0.90-7.el9`
`libjpeg-turbo-debugsource` Red Hat:enterprise_linux:9::appstream	All versions	`0:2.0.90-7.el9`
`libjpeg-turbo-devel` Red Hat:enterprise_linux:9::appstream	All versions	`0:2.0.90-7.el9`
`libjpeg-turbo-utils` Red Hat:enterprise_linux:9::appstream	All versions	`0:2.0.90-7.el9`
`libjpeg-turbo-utils-debuginfo` Red Hat:enterprise_linux:9::appstream	All versions	`0:2.0.90-7.el9`
`turbojpeg-debuginfo` Red Hat:enterprise_linux:9::appstream	All versions	`0:2.0.90-7.el9`
`libjpeg-turbo-debuginfo` Red Hat:enterprise_linux:9::crb	All versions	`0:2.0.90-7.el9`
`libjpeg-turbo-debugsource` Red Hat:enterprise_linux:9::crb	All versions	`0:2.0.90-7.el9`
`libjpeg-turbo-utils-debuginfo` Red Hat:enterprise_linux:9::crb	All versions	`0:2.0.90-7.el9`
`turbojpeg` Red Hat:enterprise_linux:9::crb	All versions	`0:2.0.90-7.el9`
`turbojpeg-debuginfo` Red Hat:enterprise_linux:9::crb	All versions	`0:2.0.90-7.el9`
`turbojpeg-devel` Red Hat:enterprise_linux:9::crb	All versions	`0:2.0.90-7.el9`
`libjpeg-turbo` Rocky Linux:9	All versions	`0:2.0.90-7.el9`

Products include Fedoraproject Fedora, Libjpeg-Turbo Libjpeg-Turbo.

How do I fix CVE-2021-29390?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-29390 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-29390 exists.

All Fedoraproject Fedora vulnerabilities

Sources

Also known as ALSA-2024:2295, CLSA-2025-1744631931, GHSA-3f9q-r2pw-87vm, RHSA-2024:2295, RLSA-2024:2295.