Vulnerability in github.com/gopacket/gopacket (CVE-2026-54345)
Summary
Vulnerability in github.com/gopacket/gopacket (CVE-2026-54345). Risk of unauthorized operations or information disclosure. Exploitable via headerSize. Mitigation: upgrade to 1.6.1 or later.
Original description
The description as published by the source.
GoPacket's Diameter AVP decoder: uint32 underflow on vendor header size leads to unbounded ~4 GiB allocation (unauthenticated remote DoS) in github.com/gopacket/gopacket
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-54345 has been found in github.com/gopacket/gopacket.
Attackers can target a specific entry point like headerSize over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 7.5/10.
What to do: upgrade github.com/gopacket/gopacket to 1.6.1 or later.
If unsure, ask your IT team or search "github.com/gopacket/gopacket CVE-2026-54345" on the vendor's site.
CVE-2026-54345 (github.com/gopacket/gopacket) — CWE-191 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: headerSize / uint32 / decodeDiameterAVP / avp.Length
Patched: 1.6.1 — apply immediately
Workaround: set SkipDecodeRecovery: true
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-191) exists in github.com/gopacket/gopacket. Attackers reach the vulnerable code path via headerSize without authentication.
Check the vendor advisory for the affected versions of github.com/gopacket/gopacket. Attack surface: headerSize / uint32 / decodeDiameterAVP / avp.Length.
Severity: High (CVSS 7.5/10). Risk of unauthorized operations or information disclosure.
Update to 1.6.1.
Workaround: set SkipDecodeRecovery: true
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/gopacket/gopacket' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'github.com/gopacket/gopacket' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/gopacket/gopacketを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
set SkipDecodeRecovery: trueパッチが適用されるまでの応急処置として、set SkipDecodeRecovery: true を実施。回避策の副作用 (機能低下) を確認した上で。
-
3Apply patch patch
Upgrade github.com/gopacket/gopacket to 1.6.1ステージング環境で 1.6.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
4Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Ubuntu UBUNTU-CVE-2026-54345 gopacket
References
- advisory github.com
- patch github.com
- web github.com
- web github.com