CVE-2026-6238

Published: Apr 28, 2026 Last Modified: Apr 29, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,5
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: low

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0005
Percentile
0,1th
Updated

EPSS Score Trend (Last 2 Days)

126

Buffer Over-read

Draft
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Availability Integrity
Potential Impacts:
Read Memory Bypass Protection Mechanism Dos: Crash, Exit, Or Restart
Applicable Platforms
Languages: C, C++, Memory-Unsafe
View CWE Details
https://inbox.sourceware.org/libc-announce/7a655d55-276f-41…
https://inbox.sourceware.org/libc-announce/7a655d55-276f-41fe-b550-feb3ebb2ce91…
https://sourceware.org/bugzilla/show_bug.cgi?id=34069
https://sourceware.org/bugzilla/show_bug.cgi?id=34069