CVE-2026-4437 PUBLISHED CVSS 7.5 HIGH

Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.

EPSS 0.04% · 12.1th percentile

Risk Scores

CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.04%
12.1th percentile

Affected Products

VendorProductVersions
The GNU C Libraryglibc2.34

Timeline

References

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