Linux Kernel up to 5.19.16/6.0.2 run_work null pointer dereference

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.19.16/6.0.2 and classified as critical. The affected element is the function run_work. Executing a manipulation can lead to null pointer dereference. This vulnerability is registered as CVE-2022-50552. The attack needs to be launched locally. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.19.16/6.0.2. This vulnerability affects the function run_work. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: blk-mq: use quiesced elevator switch when reinitializing queues The hctx's run_work may be racing with the elevator switch when reinitializing hardware queues. The queue is merely frozen in this context, but that only prevents requests from allocating and doesn't stop the hctx work from running. The work may get an elevator pointer that's being torn down, and can result in use-after-free errors and kernel panics (example below). Use the quiesced elevator switch instead, and make the previous one static since it is now only used locally. nvme nvme0: resetting controller nvme nvme0: 32/0/0 default/read/poll queues BUG: kernel NULL pointer dereference, address: 0000000000000008 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 80000020c8861067 P4D 80000020c8861067 PUD 250f8c8067 PMD 0 Oops: 0000 [#1] SMP PTI Workqueue: kblockd blk_mq_run_work_fn RIP: 0010:kyber_has_work+0x29/0x70 ... Call Trace: __blk_mq_do_dispatch_sched+0x83/0x2b0 __blk_mq_sched_dispatch_requests+0x12e/0x170 blk_mq_sched_dispatch_requests+0x30/0x60 __blk_mq_run_hw_queue+0x2b/0x50 process_one_work+0x1ef/0x380 worker_thread+0x2d/0x3e0

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2022-50552 since 10/07/2025. The exploitation appears to be difficult. The attack needs to be approached locally. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 284771 (EulerOS 2.0 SP10 : kernel (EulerOS-SA-2026-1050)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.19.17 or 6.0.3 eliminates this vulnerability. Applying the patch 63a681bcc32a43528ce0f690569f7f48e59c3963/c478b3b2900f1834cf9eda5bfef0d5696099505d/8237c01f1696bc53c470493bf1fe092a107648a6 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (284771), EUVD (EUVD-2025-32006) and CERT Bund (WID-SEC-2025-2229). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• RESF Rocky Linux
• Open Source Linux Kernel
• IBM QRadar SIEM
• Dell NetWorker

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.19.0
• 5.19.1
• 5.19.2
• 5.19.3
• 5.19.4
• 5.19.5
• 5.19.6
• 5.19.7
• 5.19.8
• 5.19.9
• 5.19.10
• 5.19.11
• 5.19.12
• 5.19.13
• 5.19.14
• 5.19.15
• 5.19.16
• 6.0.0
• 6.0.1
• 6.0.2

License

• open-source

Website

• Vendor: https://www.kernel.org/

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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