Medium [CVE-2026-77014] Libsoup: libsoup: integer truncation in sort_ranges comparator causes silent omission of http range responses
This medium-severity Red Hat Linux advisory covers CVE-2026-77014 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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Summary
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. A remote attacker can exploit this to cause the server to silently omit requested byte ranges from responses.
Exploitation requires the server to be serving resources larger than approximately 2 GB, which limits real-world impact. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N).
Weakness: CWE-197. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: libsoup3; Red Hat package: gnome-clocks; Red Hat package: podman.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 52 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 52 minutes ago·verify at source
Mitigation checklist
- No mitigation is available for this vulnerability.
Official advisory · high-confidence parse· fetched 52 minutes ago·verify at source
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