CVE-2021-29338

Exp

Integer Overflow in OpenJPEG v2.4.0 allows remote attackers to crash the application, causing a Denial of Service (DoS). This occurs when the attacker uses the command line option "-ImgDir" on a directory that contains 1048576 files.

Published: 2021-04-14 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-29338 is rated High Exploit Risk (63.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.57%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.46% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-29338

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-29338

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.11% 1.57% +1.46%
2 2025-11-21 0.35% 0.11% -0.24%
3 2025-11-18 — 0.35% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-29338

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2021-29338

OS Trackers for CVE-2021-29338

vendor priority summary link
alpine — CVE-2021-29338: 1 source package rows (openjpeg); 18 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 13, open 5. https://security.alpinelinux.org/vuln/CVE-2021-29338
debian not yet assigned CVE-2021-29338 not yet assigned priority: Debian including 1 source packages (openjpeg2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-29338
gentoo normal CVE-2021-29338: 1 GLSA(s) (202209-04), 1 atom(s) (media-libs/openjpeg); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-29338
redhat low — https://access.redhat.com/security/cve/CVE-2021-29338
suse low CVE-2021-29338 severity low: SUSE including 29 source package names (0.3.2-1.2:libopenjp2-7-2.3.0-150000.3.5.1, 0.3.32-3.4:libopenjp2-7-2.3.0-150000.3.5.1, …), 199 product×package rows across 67 product lines (Container containers/lmcache-vllm-openai, Container containers/open-webui, … (67 product lines)): Fixed 199. https://www.suse.com/security/cve/CVE-2021-29338/
ubuntu low CVE-2021-29338 low priority: Ubuntu including 7 source packages (blender, ghostscript, …), 112 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 34, DNE 25, not-affected 21, needed 18, needs-triage 6, released 5, deferred 3. https://ubuntu.com/security/CVE-2021-29338

Affected software / configurations for CVE-2021-29338

Vendor Product Version Raw CPE
uclouvain openjpeg 2.4.0 cpe:2.3:a:uclouvain:openjpeg:2.4.0:*:*:*:*:*:*:*
fedoraproject fedora 33 cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
fedoraproject fedora 34 cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

References for CVE-2021-29338

cvelogic Threat Intelligence