PT-2026-26671 · Gnu+2 · Gnu C Library+2
CVE-2026-4438
·
Published
2026-01-01
·
Updated
2026-07-29
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
GNU C library versions 2.34 through 2.43
Description
The GNU C library’s
gethostbyaddr and gethostbyaddr r functions, when used with a configured nsswitch.conf file specifying the library’s DNS backend, may return invalid DNS hostnames. This behavior violates the DNS specification.Recommendations
Update the GNU C library to a version later than 2.43.
Exploit
Fix
RCE
Argument Injection
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Related Identifiers
Affected Products
Gnu C Library
Rocky Linux
Ubuntu