CVE-2026-42492
Description
A flaw was found in Xen. Unprivileged domains can trigger an error in the virtual interrupt request (vIRQ) event channel binding, specifically within the management of a bitmap related to the VIRQ_DOM_EXC. This error path can cause the bitmap to be improperly torn down, even if it was not correctly set up. This issue may disrupt Xenstore's ability to maintain an accurate view of the system's domains, potentially leading to a denial of service for Xenstore functionality.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability,Other
Technical Impact: DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands; Modify Memory; Other
Depending on the locking being used, an unlock operation might not have any adverse effects. When effects exist, the most common consequence will be a corruption of the state of the product, possibly leading to a crash or exit; depending on the implementation of the unlocking, memory corruption or code execution could occur.
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