Bug 2266422 (CVE-2021-46911) - CVE-2021-46911 kernel: denial of service in ch_ktls
Summary: CVE-2021-46911 kernel: denial of service in ch_ktls
Keywords:
Status: NEW
Alias: CVE-2021-46911
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2266425
Blocks: 2266369
TreeView+ depends on / blocked
 
Reported: 2024-02-27 19:18 UTC by Rohit Keshri
Modified: 2024-03-26 18:32 UTC (History)
49 users (show)

Fixed In Version:
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A flaw was found in ch_ktls in the Linux Kernel. This issue occurs due to a missing synchronization lock, which may cause a denial of service while doing page cleanup.
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Description Rohit Keshri 2024-02-27 19:18:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ch_ktls: Fix kernel panic

Taking page refcount is not ideal and causes kernel panic
sometimes. It's better to take tx_ctx lock for the complete
skb transmit, to avoid page cleanup if ACK received in middle.

https://git.kernel.org/stable/c/1a73e427b824133940c2dd95ebe26b6dce1cbf10
https://git.kernel.org/stable/c/8348665d4181c68b0ca1205b48e1753d78bc810f
https://git.kernel.org/stable/c/8d5a9dbd2116a852f8f0f91f6fbc42a0afe1091f
Comment 1 Rohit Keshri 2024-02-27 19:30:34 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266425]
Comment 3 Justin M. Forbes 2024-02-27 23:06:10 UTC 
This was fixed for Fedora with the 5.11.16 stable kernel updates.
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