Bug#1116469: libsoup3: CVE-2025-11021

[Salvatore Bonaccorso]

Source: libsoup3
Version: 3.6.5-3
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/libsoup/-/issues/459
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for libsoup3.

Opening a tracking bug, we marked this already no-dsa for trixie and
bookworm.

CVE-2025-11021[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2025-11021
    https://www.cve.org/CVERecord?id=CVE-2025-11021
[1] https://gitlab.gnome.org/GNOME/libsoup/-/issues/459

Regards,
Salvatore