Bug 2492410 (CVE-2026-53077)

Summary: CVE-2026-53077 kernel: net/rds: Restrict use of RDS/IB to the initial network namespace
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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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A flaw was found in the Linux kernel's Reliable Datagram Sockets over InfiniBand (RDS/IB) component. This vulnerability allowed the use of RDS/IB in network namespaces other than the initial one, where the existing code would not function correctly. This improper operation could lead to unexpected system behavior or a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-06-24 18:10:47 UTC
In the Linux kernel, the following vulnerability has been resolved:

net/rds: Restrict use of RDS/IB to the initial network namespace

Prevent using RDS/IB in network namespaces other than the initial one.
The existing RDS/IB code will not work properly in non-initial network
namespaces.

Comment 1 Mauro Matteo Cascella 2026-06-26 12:23:20 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062406-CVE-2026-53077-a66c@gregkh/T