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In the Linux kernel, the following vulnerability has been resolved: net: rds: fix MR cleanup on copy error __rds_rdma_map() hands sg/pages ownership to the transport after get_mr() succeeds. If copying the generated cookie back to user space fails after that point, the error path must not free those resources again before dropping the MR reference. Remove the duplicate unpin/free from the put_user() failure branch so that MR teardown is handled only through the existing final cleanup path.

The Linux kernel vulnerability CVE-2026-46053 affects the RDS (Reliable Datagram Sockets) subsystem. It arises from improper handling of memory region (MR) cleanup on copy errors in the __rds_rdma_map() function. After get_mr() succeeds, the function transfers ownership of scatter-gather/pages to the transport. If copying the generated cookie back to user space fails, the error path incorrectly frees these resources again before dropping the MR reference, causing duplicate unpin/free operations. This flaw can lead to memory corruption and potentially compromise system confidentiality, integrity, and availability. The issue affects multiple Linux kernel versions prior to specific 5.15.0-xxx builds for Ubuntu 20.04.1 HWE edge kernels. A patch has been released by Ubuntu and Canonical, with updated kernel versions available. Users must update and reboot to apply the fix.

Detailed information about UBUNTU-CVE-2026-46053 affecting null linux-hwe-edge. Get real-time updates, technical details, and mitigation strategies.

UBUNTU-CVE-2026-46053 - Live Threat Intelligence - Threat Radar | OffSeq.com

Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: net: rds: fix MR cleanup on copy error __rds_rdma_map() hands sg/pages ownership… (CVE-2026-46053)

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

This vulnerability concerns the RDS (Reliable Datagram Sockets) networking component in Microsoft and Azure Linux 3.0, specifically a failure to properly clean up memory regions when a copy operation fails. The lack of detailed technical data limits further analysis. The vulnerability is cataloged under CVE-2026-46053 by the Microsoft Security Response Center. No patch or mitigation details are currently available.

Detailed information about net: rds: fix MR cleanup on copy error affecting Microsoft Security Response Center Microsoft. Get real-time updates, technical detai

net: rds: fix MR cleanup on copy error - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-46053 net: rds: fix MR cleanup on copy error - VEX

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net: rds: fix MR cleanup on copy error


Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: net: rds: fix MR cleanup on copy error __rds_rdma_map() hands sg/pages ownership… (CVE-2026-46053)CVE-2026-46053 0 In the Linux kernel, the following vulnerability has been resolved: net: rds: fix MR cleanup on copy error __rds_rdma_map() hands sg/pages ownership to the transport after get_mr() succeeds. If copying the generated cookie back to user space fails after that point, the error path must not free those resources again before dropping the MR reference. Remove the duplicate unpin/free from the put_user() failure branch so that MR teardown is handled only through the existing final cleanup path. MediumVulnerability#gcve #osv #ubuntu-cve-2026-46053 Join the discussion	GCVE Database	05/27/2026, 14:17:00 UTC Added: 07/17/2026, 10:21:20 UTC
net: rds: fix MR cleanup on copy errorCVE-2026-46053 0 To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle UnknownVulnerability#gcve #csaf #cve-2026-46053 Join the discussion	GCVE Database	05/02/2026, 00:00:00 UTC Added: 05/28/2026, 20:54:40 UTC

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