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A vulnerability in the Linux kernel's AFS network namespace teardown was fixed to ensure proper cancellation of a preallocation charger work item. This fix prevents issues during the teardown process by skipping charging and avoiding requeuing when the network namespace is being deleted. The vulnerability was identified through AI review and affects multiple specific versions of the linux-azure kernel.

The vulnerability in the Linux kernel (CVE-2026-74427) relates to the AFS (Andrew File System) network namespace teardown process. The flaw involved not properly cancelling the work item that maintains the preallocated rxrpc call/connection/peer queue charged before incoming calls are disabled. The fix ensures that during the teardown of an AFS network namespace, the preallocation charger work item is cancelled. Additionally, if the network namespace is no longer live (being deleted), the charging function skips charging and the call function avoids requeuing the charger. This resolves potential issues during namespace teardown.

Detailed information about In the Linux kernel, the following vulnerability has been resolved: afs: Fix netns teardown to cancel the preallocation charger Fix t

In the Linux kernel, the following vulnerability has been resolved: afs: Fix netns teardown to cancel the preallocation charger Fix the teardown of… (CVE-2026-74427) - Live Threat Intelligence - Threat Radar | OffSeq.com

Linux azure: In the Linux kernel, the following vulnerability has been resolved: afs: Fix netns teardown to cancel the preallocation charger Fix the teardown of… (CVE-2026-74427)

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