Red Hat Enterprise Linux/Hardened Images denial of service

Summaryinfo

A vulnerability labeled as critical has been found in Red Hat Enterprise Linux and Hardened Images. The affected element is an unknown function. Such manipulation leads to denial of service. This vulnerability is documented as CVE-2026-120749. The attack needs to be performed locally. There is not any exploit available.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux and Hardened Images (the affected version unknown). It has been rated as critical. Affected by this issue is an unknown part. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

A flaw was found in D-Bus. With a privileged Monitoring client attached (for example dbus-monitor or busctl monitor), an unprivileged local user can cause dbus-daemon to abort if a driver-originated broadcast such as NameOwnerChanged or ActivatableServicesChanged cannot be delivered to a recipient (for example due to a deny rule or an exceeded outgoing message queue). Driver broadcasts still use serial 0; when delivery fails, composing the monitor error reply asserts reply_serial != 0 and aborts the daemon. This is an incomplete fix for CVE-2023-34969, which only assigned serials for driver messages sent to a single recipient. On the well-known system bus this is a denial of service.

The advisory is shared for download at access.redhat.com. This vulnerability is handled as CVE-2026-120749 since 11/02/2026. The exploitation is known to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/06/2026).

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux
• Hardened Images

License

• commercial

Website

• Vendor: https://www.redhat.com/

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Once again VulDB remains the best source for vulnerability data.

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