CVE-2016-6261

libidn: Out of bounds stack read in idna_to_ascii_4i

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Severity

Low

Red Hat Product Security

3.7

CVSS 3.0

Review impact separately from score.

Published · July 20, 2016

Updated · November 21, 2025

Description

The idna_to_ascii_4i function in lib/idna.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via 64 bytes of input.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 3.7
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS 2.0 · 2.6
AV:N/AC:H/Au:N/C:P/I:N/A:N

CWE-125 · Out-of-bounds Read