Bug 2570973 (CVE-2026-59771)

Summary: CVE-2026-59771 migtd: MigTD: Denial of Service via improper array index validation in virtio-serial driver
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the virtio-serial driver of the Intel Trust Domain Extensions (TDX) Migration Trust Domain (MigTD). Due to improper validation of an array index, a local user with administrative or hypervisor-level privileges can trigger an out-of-bounds access. Successful exploitation can lead to a Denial of Service (DoS) by causing the migration domain to crash.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 20:34:12 UTC 
Improper validation of array index in the MigTD's virtio-serial driver for the Intel(R) TDX Migration Trust Domain (MigTD) within Ring 0: Hypervisor may allow a denial of service. System software adversary with a privileged user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.