CVE-2025-26309: A memory leak has been identified in the parseSWF_DEFINESCENEANDFRAMEDATA function in util/parser.c of libming

Routine

MEDIUM 6.5DOWNGRADE

CVE-2025-26309 is a medium-severity flaw (CVSS 6.5) affecting libming. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A memory leak has been identified in the parseSWF_DEFINESCENEANDFRAMEDATA function in util/parser.c of libming v0.4.8, which allows attackers to cause a denial of service via a crafted SWF file.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-200
Published	2025-02-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: libming

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

Am I affected?

Timeline

2025-02-20 17:15 UTCPublished CVE record published
2026-06-17 09:01 UTCUpdated Record last modified

libming libming DOWNGRADE

Affected: 0.4.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.4.8

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.4.8 (Debian / Ubuntu)

apt-cache madison libming sudo apt install libming=<VERSION_BEFORE_0.4.8> sudo apt-mark hold libming

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list libming sudo dnf downgrade libming-<VERSION_BEFORE_0.4.8> sudo dnf versionlock add libming

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2025-26309?

libming: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-26309 being exploited?

CVE-2025-26309 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-2025-26309 affect?

CVE-2025-26309 affects libming. Severity is medium (CVSS 6.5). A memory leak has been identified in the parseSWF_DEFINESCENEANDFRAMEDATA function in util/parser.c of libming v0.4.8, which allows attackers to cause a denial of service via a crafted SWF file.

How urgent is CVE-2025-26309?

Priority 36/100. Public exploit reference

Related CVEs

CVE-2025-66869 HIGH 7.5 DOWNGRADE Buffer overflow vulnerability in function strcat in asan_interceptors.cpp in libming 0.4.8.
CVE-2025-66877 HIGH 7.5 DOWNGRADE Buffer overflow vulnerability in function dcputchar in decompile.c in libming 0.4.8.
CVE-2025-29497 MEDIUM 6.5 DOWNGRADE libming v0.4.8 was discovered to contain a memory leak via the parseSWF_MORPHFILLSTYLES function.
CVE-2025-29496 MEDIUM 6.5 DOWNGRADE libming v0.4.8 was discovered to contain a segmentation fault via the decompileDUPLICATECLIP function
CVE-2025-29494 MEDIUM 6.5 DOWNGRADE libming v0.4.8 was discovered to contain a segmentation fault via the decompileGETMEMBER function

References

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