Red Hat Enterprise Linux GSO Library integer overflow

Summaryinfo

A vulnerability has been found in Red Hat Enterprise Linux, Fast Datapath, OpenShift Container Platform and OpenStack Platform and classified as very critical. This affects an unknown function of the component GSO Library. Performing a manipulation results in integer overflow. This vulnerability is reported as CVE-2026-100236. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Red Hat Enterprise Linux, Fast Datapath, OpenShift Container Platform and OpenStack Platform (the affected version unknown). This affects an unknown part of the component GSO Library. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in the DPDK GSO library. When software GSO copies packet headers into a new mbuf, it does not check that the header fits in the source first segment or in the destination buffer, and a header longer than the configured GSO segment size can underflow the payload-size calculation. A remote or guest-supplied packet processed with software GSO can trigger an out-of-bounds read or write.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-100236 since 09/25/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $25k-$100k at the moment (estimation calculated on 10/14/2026).

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

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Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux
• Fast Datapath
• OpenShift Container Platform
• OpenStack Platform

License

• commercial

Website

• Vendor: https://www.redhat.com/

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