CVE-2025-63929: A null pointer dereference vulnerability exists in airpig2011 IEC104 thru Commit be6d841 (2019-07-08)

Q: How do I fix CVE-2025-63929?

iec104: upgrade to newer than 2019-07-08. Exact commands for each OS are on this page.

Q: Is CVE-2025-63929 being exploited?

CVE-2025-63929 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-2025-63929 affect?

CVE-2025-63929 affects iec104. Severity is high (CVSS 7.5). A null pointer dereference vulnerability exists in airpig2011 IEC104 thru Commit be6d841 (2019-07-08). When multiple threads enqueue elements concurrently via IEC10X_PrioEnQueue, the function may dereference a null or freed queue pointer, r

Q: How urgent is CVE-2025-63929?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2025-63929 is a high-severity flaw (CVSS 7.5) affecting iec104. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A null pointer dereference vulnerability exists in airpig2011 IEC104 thru Commit be6d841 (2019-07-08). When multiple threads enqueue elements concurrently via IEC10X_PrioEnQueue, the function may dereference a null or freed queue pointer, resulting in a segmentation fault and potential denial-of-service.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
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-476
Published	2025-11-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: airpig2011

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

Am I affected?

Timeline

2025-11-12 19:15 UTCPublished CVE record published
2026-06-17 09:53 UTCUpdated Record last modified

airpig2011 iec104 UPGRADE

Affected: <= 2019-07-08

Fixed in: newer than 2019-07-08

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy iec104 || rpm -q iec104 || iec104 --version

2. UPGRADE to newer than 2019-07-08 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade iec104

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade iec104

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-2025-63929?

iec104: upgrade to newer than 2019-07-08. Exact commands for each OS are on this page.

Is CVE-2025-63929 being exploited?

CVE-2025-63929 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-2025-63929 affect?

CVE-2025-63929 affects iec104. Severity is high (CVSS 7.5). A null pointer dereference vulnerability exists in airpig2011 IEC104 thru Commit be6d841 (2019-07-08). When multiple threads enqueue elements concurrently via IEC10X_PrioEnQueue, the function may dereference a null or freed queue pointer, r

How urgent is CVE-2025-63929?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-63927 MEDIUM 4.0 UPGRADE A heap-use-after-free vulnerability exists in airpig2011 IEC104 thru Commit be6d841 (2019-07-08)

References

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