Bug#1144976: libsoup3: CVE-2026-77014

[Salvatore Bonaccorso]

Source: libsoup3
Version: 3.6.6-1
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/550
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for libsoup3.

CVE-2026-77014[0]:
| A flaw was found in libsoup's SoupServer HTTP Range header
| processing. The sort_ranges() comparator in soup-message-headers.c
| truncates a 64-bit subtraction result to 32-bit int, flipping the
| sign for range offsets differing by more than INT_MAX. This causes
| silent omission of requested byte ranges from HTTP 206 Partial
| Content responses on resources larger than approximately 2 GB.


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-2026-77014
    https://www.cve.org/CVERecord?id=CVE-2026-77014
[1] https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/550

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore