CVE-2026-77014
Libsoup: libsoup: integer truncation in sort_ranges() comparator causes silent omission of http range responses
What happened?
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.
Affected software and versions
| Software | Version information | Fixed version |
|---|---|---|
| libsoup3Red Hat | Default status: affected | See vendor advisory |
| libsoupRed Hat | Default status: affected | See vendor advisory |
| gnome-clocksRed Hat | Default status: affected | See vendor advisory |
| libsoupRed Hat | Default status: affected | See vendor advisory |
| container-tools:rhel8/podmanRed Hat | Default status: affected | See vendor advisory |
| libsoupRed Hat | Default status: affected | See vendor advisory |
| libsoupRed Hat | Default status: affected | See vendor advisory |
| podmanRed Hat | Default status: affected | See vendor advisory |
| podmanRed Hat | Default status: affected | See vendor advisory |
Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.
Is it being exploited?
This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.
How to respond
- Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
- Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
- Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.