Bug 2516889 (CVE-2026-74296)

Summary: CVE-2026-74296 kernel: RDMA/mlx5: Release the HW‑provided UAR index rather than the SW one
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: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the RDMA/mlx5 component of the Linux kernel. This vulnerability occurs due to an incorrect User Access Register (UAR) index release, where the software-provided index is freed instead of the hardware-provided one. This improper resource management could potentially lead to resource exhaustion or system instability, impacting the availability of the system.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-08-15 06:38:45 UTC
In the Linux kernel, the following vulnerability has been resolved:

RDMA/mlx5: Release the HW‑provided UAR index rather than the SW one

Free the UAR index returned by the hardware.