Double Free Affecting cilium-envoy-fips-1.17 package, versions <1.17.15-r2


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.81% (53rd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-CILIUMENVOYFIPS117-16617590
  • published9 May 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-33811  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

Upgrade Chainguard cilium-envoy-fips-1.17 to version 1.17.15-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cilium-envoy-fips-1.17 package and not the cilium-envoy-fips-1.17 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.

References

CVSS Base Scores

version 3.1