Is CVE-2026-6238 actively exploited?

No active exploitation of CVE-2026-6238 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-6238 be exploited remotely?

Yes. CVE-2026-6238 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-6238?

CVE-2026-6238 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-6238

CWE-126Published: April 28, 2026· Updated: May 4, 2026

6.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:10.9th

Official Description

The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to validate the RDATA content against the RDATA length in a DNS response when processing LOC, CERT, TKEY or TSIG records, which may allow an attacker to craft a DNS response, causing a target application to crash or read uninitialized memory.

These functions are for application debugging only and hence not in the path of code executed by the DNS resolver. Further, they have been deprecated since version 2.34 and should not be used by any new applications. Applications should consider porting away from these interfaces since they may be removed in future versions.

NVD Source

Technical Analysis

CVE-2026-6238 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.