CVE-2025-11579: github.com/nwaples/rardecode versions <=2.1.1 fail to restrict the dictionary size when reading large RAR dict

Q: How do I fix CVE-2025-11579?

rardecode: upgrade to newer than 2.1.1. Exact commands for each OS are on this page.

Q: Is CVE-2025-11579 being exploited?

CVE-2025-11579 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-2025-11579 affect?

CVE-2025-11579 affects rardecode. Severity is medium (CVSS 5.3). github.com/nwaples/rardecode versions <=2.1.1 fail to restrict the dictionary size when reading large RAR dictionary sizes, which allows an attacker to provide a specially crafted RAR file and cause Denial of Service via an Out Of Memory Cr

Q: How urgent is CVE-2025-11579?

Priority 31/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2025-11579 is a medium-severity flaw (CVSS 5.3) affecting rardecode. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

github.com/nwaples/rardecode versions <=2.1.1 fail to restrict the dictionary size when reading large RAR dictionary sizes, which allows an attacker to provide a specially crafted RAR file and cause Denial of Service via an Out Of Memory Crash.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-789
Published	2025-10-10
Last modified	2026-10-08

Publisher (CNA): Mattermost, Inc. · Vendor: nwaples

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-10 12:15 UTCPublished CVE record published
2026-10-08 13:10 UTCUpdated Record last modified

nwaples rardecode UPGRADE

Affected: <= 2.1.1

Fixed in: newer than 2.1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.1.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rardecode

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-2025-11579?

rardecode: upgrade to newer than 2.1.1. Exact commands for each OS are on this page.

Is CVE-2025-11579 being exploited?

CVE-2025-11579 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-2025-11579 affect?

CVE-2025-11579 affects rardecode. Severity is medium (CVSS 5.3). github.com/nwaples/rardecode versions <=2.1.1 fail to restrict the dictionary size when reading large RAR dictionary sizes, which allows an attacker to provide a specially crafted RAR file and cause Denial of Service via an Out Of Memory Cr

How urgent is CVE-2025-11579?

Priority 31/100. Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities

References

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