CVE-2025-11021 HIGH

CVE-2025-11021: Libsoup: out-of-bounds read in cookie date handling of libsoup http library

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-125
Published September 26, 2025
Last update March 19, 2026

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

A flaw was found in the cookie date handling logic of the libsoup HTTP library, widely used by GNOME and other applications for web communication. When processing cookies with specially crafted expiration dates, the library may perform an out-of-bounds memory read. This flaw could result in unintended disclosure of memory contents, potentially exposing sensitive information from the process using libsoup.

Key dates

02Disclosure timeline

September 26, 2025 CVE published
March 19, 2026 Record updated