NULL Pointer Dereference Affecting openshift4/ose-coredns package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.54% (43rd percentile)

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  • Snyk IDSNYK-RHEL7-OPENSHIFT4OSECOREDNS-19702976
  • published12 Sept 2026
  • disclosed16 Jul 2026

Introduced: 16 Jul 2026

CVE-2026-62299  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 openshift4/ose-coredns.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openshift4/ose-coredns package and not the openshift4/ose-coredns package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

CoreDNS is a DNS server written in Go. Prior to 1.14.5, the CoreDNS rewrite plugin supports edns0 rewrite rules with an optional revert flag, and two response rules, edns0SetResponseRule and edns0ReplaceResponseRule[T] in plugin/rewrite/edns0.go, call res.IsEdns0() and immediately dereference the returned *dns.OPT without a nil check when a downstream plugin returns a response with no OPT record. A remote, unauthenticated client can send a single ordinary DNS query matching a rewrite edns0 <local|nsid|subnet> <set|append|replace> ... revert rule, causing ResponseReverter in plugin/rewrite/reverter.go to panic, return SERVFAIL, and degrade availability, or crash the CoreDNS process if the debug directive disables recovery. This issue is fixed in version 1.14.5.

CVSS Base Scores

version 3.1