CVE-2026-54345: gopacket provides packet processing capabilities for Go

Q: How do I fix CVE-2026-54345?

gopacket: upgrade to 1.6.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-54345 being exploited?

CVE-2026-54345 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-2026-54345 affect?

CVE-2026-54345 affects gopacket. Severity is high (CVSS 7.5). gopacket provides packet processing capabilities for Go. In version 1.6.0 and earlier, the Diameter AVP decoder computes an AVP data length by subtracting a fixed header size from an attacker-controlled AVP Length field, so a vendor-flagged

Q: How urgent is CVE-2026-54345?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-54345 is a high-severity flaw (CVSS 7.5) affecting gopacket. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

gopacket provides packet processing capabilities for Go. In version 1.6.0 and earlier, the Diameter AVP decoder computes an AVP data length by subtracting a fixed header size from an attacker-controlled AVP Length field, so a vendor-flagged AVP whose Length is smaller than the 12-byte header underflows the unsigned 32-bit value and drives an unbounded allocation of roughly 4 GiB, and two such messages in succession OOM-kill a collector, causing a

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	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-191, CWE-770
Published	2026-07-28
Last modified	2026-08-05

Publisher (CNA): GitHub, Inc. · Vendor: gopacket

Last updated 2026-08-05 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-28 17:16 UTCPublished CVE record published
2026-08-05 19:04 UTCUpdated Record last modified

gopacket gopacket UPGRADE

Affected: < 1.6.1

Fixed in: 1.6.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.6.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gopacket

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-2026-54345?

gopacket: upgrade to 1.6.1. Exact commands for each OS are on this page.

Is CVE-2026-54345 being exploited?

CVE-2026-54345 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-2026-54345 affect?

CVE-2026-54345 affects gopacket. Severity is high (CVSS 7.5). gopacket provides packet processing capabilities for Go. In version 1.6.0 and earlier, the Diameter AVP decoder computes an AVP data length by subtracting a fixed header size from an attacker-controlled AVP Length field, so a vendor-flagged

How urgent is CVE-2026-54345?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-54332 HIGH 7.5 UPGRADE gopacket provides packet processing capabilities for Go

References

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