Bug 2445242 (CVE-2026-26018) - CVE-2026-26018 github.com/coredns/coredns: CoreDNS: Denial of Service vulnerability due to predictable pseudo-random number generation
Summary: CVE-2026-26018 github.com/coredns/coredns: CoreDNS: Denial of Service vulnera...
Keywords:
Status: NEW
Alias: CVE-2026-26018
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-06 16:02 UTC by OSIDB Bzimport
Modified: 2026-03-06 18:21 UTC (History)
5 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-03-06 16:02:01 UTC 
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNS's loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. This issue has been patched in version 1.14.2.
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