Bug 2347759 (CVE-2022-49672) - CVE-2022-49672 kernel: net: tun: unlink NAPI from device on destruction
Summary: CVE-2022-49672 kernel: net: tun: unlink NAPI from device on destruction
Keywords:
Status: NEW
Alias: CVE-2022-49672
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-02-26 03:05 UTC by OSIDB Bzimport
Modified: 2025-02-26 17:37 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-02-26 03:05:44 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: tun: unlink NAPI from device on destruction

Syzbot found a race between tun file and device destruction.
NAPIs live in struct tun_file which can get destroyed before
the netdev so we have to del them explicitly. The current
code is missing deleting the NAPI if the queue was detached
first.
Comment 1 Avinash Hanwate 2025-02-26 13:25:27 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022624-CVE-2022-49672-e5ec@gregkh/T
Comment 2 Avinash Hanwate 2025-02-26 17:35:40 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022624-CVE-2022-49672-e5ec@gregkh/T
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