CVE-2026-54345: Integer Underflow

Description

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 an unauthenticated remote denial of service. This issue is fixed in version 1.6.1.

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Weakness Type (CWE)

CWE-191 CWE-191

CWE-770 CWE-770

References

Other References

https://github.com/gopacket/gopacket/commit/145859d0eaee1a6f5925ffb93851c976449c3311 https://github.com/gopacket/gopacket/releases/tag/v1.6.1 https://github.com/gopacket/gopacket/security/advisories/GHSA-6r28-9ppf-4hj5 https://github.com/gopacket/gopacket/security/advisories/GHSA-6r28-9ppf-4hj5

Frequently Asked Questions

What is CVE-2026-54345? +

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 an unauthenticated remote denial of service. This issue is fixed in version 1.6.1.

How do I check if I'm vulnerable to CVE-2026-54345? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-54345