Red Hat Enterprise Linux/OpenShift Container Platform libsoup soup-message-headers.c sort_ranges integer overflow

Summaryinfo

A vulnerability has been found in Red Hat Enterprise Linux and OpenShift Container Platform and classified as problematic. The affected element is the function sort_ranges of the file soup-message-headers.c of the component libsoup. The manipulation leads to integer overflow. This vulnerability is documented as CVE-2026-77014. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux and OpenShift Container Platform (the affected version unknown). It has been rated as problematic. This issue affects the function sort_ranges of the file soup-message-headers.c of the component libsoup. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is integrity. The summary by CVE is:

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.

The advisory is shared at access.redhat.com. The identification of this vulnerability is CVE-2026-77014 since 08/20/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/20/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-63225). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux
• OpenShift Container Platform

License

• commercial

Website

• Vendor: https://www.redhat.com/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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