CVE-2025-8836: A vulnerability was determined in JasPer up to 4.2.5

Q: How do I fix CVE-2025-8836?

jasper: upgrade to newer than 4.2.5. Exact commands for each OS are on this page.

Q: Is CVE-2025-8836 being exploited?

CVE-2025-8836 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-8836 affect?

CVE-2025-8836 affects jasper. Severity is low (CVSS 3.3). A vulnerability was determined in JasPer up to 4.2.5. Affected by this issue is the function jpc_floorlog2 of the file src/libjasper/jpc/jpc_enc.c of the component JPEG2000 Encoder. The manipulation leads to reachable assertion. The attack

Q: How urgent is CVE-2025-8836?

Priority 19/100. Public exploit reference

Routine

LOW 3.3UPGRADE

CVE-2025-8836 is a low-severity flaw (CVSS 3.3) affecting jasper. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was determined in JasPer up to 4.2.5. Affected by this issue is the function jpc_floorlog2 of the file src/libjasper/jpc/jpc_enc.c of the component JPEG2000 Encoder. The manipulation leads to reachable assertion. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used. The patch is identified as 79185d32d7a444abae441935b20ae4676b3513d4. It is recommended to apply a patch to fix this

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	3.3 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-617
Published	2025-08-11
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: jasper project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-11 08:15 UTCPublished CVE record published
2026-06-17 10:07 UTCUpdated Record last modified

jasper project jasper UPGRADE

Affected: <= 4.2.5

Fixed in: newer than 4.2.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy jasper || rpm -q jasper || jasper --version

2. UPGRADE to newer than 4.2.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade jasper

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jasper

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-8836?

jasper: upgrade to newer than 4.2.5. Exact commands for each OS are on this page.

Is CVE-2025-8836 being exploited?

CVE-2025-8836 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-8836 affect?

CVE-2025-8836 affects jasper. Severity is low (CVSS 3.3). A vulnerability was determined in JasPer up to 4.2.5. Affected by this issue is the function jpc_floorlog2 of the file src/libjasper/jpc/jpc_enc.c of the component JPEG2000 Encoder. The manipulation leads to reachable assertion. The attack

How urgent is CVE-2025-8836?

Priority 19/100. Public exploit reference

Related CVEs

CVE-2025-8837 MEDIUM 5.3 UPGRADE A vulnerability was identified in JasPer up to 4.2.5
CVE-2025-8835 LOW 3.3 UPGRADE A vulnerability was found in JasPer up to 4.2.5

References

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