CVE-2026-77014

Libsoup: libsoup: integer truncation in sort_ranges() comparator causes silent omission of http range responses

State: Published
Severity: 5.3 Medium
Published: Aug 20, 2026
Updated: Aug 25, 2026
Reserved: Aug 20, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	redhat

Weaknesses

CWE-197 Numeric Truncation Error

Affected Products

Product	Versions
Red Hat Enterprise Linux 10Red Hat
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 8Red Hat
Red Hat Enterprise Linux 8Red Hat
Red Hat Enterprise Linux 9Red Hat
Red Hat Enterprise Linux 9Red Hat
Red Hat OpenShift Container Platform 4Red Hat

References

https://access.redhat.com/security/cve/CVE-2026-77014vdb-entry
RHBZ#2520143issue-tracking
https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/550

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