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VulnerabilityPoC2

CVE-2026-4437

CVSS 3.1
7.5 high
EPSS
<1%p28
Published
·
Modified
Analyze CVE-2026-4437 with Vani AIImpact, affected versions, exploitation status, mitigations and detection

Description · NVD

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.

Vendors
gnu
Products
glibc
Weakness
CWE-125
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD CVE.org GitHub PoCs EPSS (0.3%)

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