Linux Kernel up to 6.0.6 netdevsim nsim_drv_probe memory leak

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.0.6. It has been declared as critical. This impacts the function nsim_drv_probe of the component netdevsim. Such manipulation leads to memory leak. This vulnerability is documented as CVE-2022-50500. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.0.6. Affected by this issue is the function nsim_drv_probe of the component netdevsim. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: netdevsim: fix memory leak in nsim_drv_probe() when nsim_dev_resources_register() failed If some items in nsim_dev_resources_register() fail, memory leak will occur. The following is the memory leak information. unreferenced object 0xffff888074c02600 (size 128): comm "echo", pid 8159, jiffies 4294945184 (age 493.530s) hex dump (first 32 bytes): 40 47 ea 89 ff ff ff ff 01 00 00 00 00 00 00 00 @G.............. ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ backtrace: [<0000000011a31c98>] kmalloc_trace+0x22/0x60 [<0000000027384c69>] devl_resource_register+0x144/0x4e0 [<00000000a16db248>] nsim_drv_probe+0x37a/0x1260 [<000000007d1f448c>] really_probe+0x20b/0xb10 [<00000000c416848a>] __driver_probe_device+0x1b3/0x4a0 [<00000000077e0351>] driver_probe_device+0x49/0x140 [<0000000054f2465a>] __device_attach_driver+0x18c/0x2a0 [<000000008538f359>] bus_for_each_drv+0x151/0x1d0 [<0000000038e09747>] __device_attach+0x1c9/0x4e0 [<00000000dd86e533>] bus_probe_device+0x1d5/0x280 [<00000000839bea35>] device_add+0xae0/0x1cb0 [<000000009c2abf46>] new_device_store+0x3b6/0x5f0 [<00000000fb823d7f>] bus_attr_store+0x72/0xa0 [<000000007acc4295>] sysfs_kf_write+0x106/0x160 [<000000005f50cb4d>] kernfs_fop_write_iter+0x3a8/0x5a0 [<0000000075eb41bf>] vfs_write+0x8f0/0xc80

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2022-50500 since 10/04/2025. The exploitation is known to be difficult. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 302439 (EulerOS 2.0 SP12 : kernel (EulerOS-SA-2026-1366)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.0.7 eliminates this vulnerability. Applying the patch 7c4957fe40e2a628b7cceaf4c9bfb5b701774d05/6b1da9f7126f05e857da6db24c6a04aa7974d644 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 (302439), EUVD (EUVD-2025-32347) and CERT Bund (WID-SEC-2025-2194). Once again VulDB remains the best source for vulnerability data.

Affected

• Google Container-Optimized OS
• Debian Linux
• Google Cloud Platform
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• Open Source Linux Kernel
• RESF Rocky Linux
• NetApp ActiveIQ Unified Manager
• IBM QRadar SIEM
• Dell NetWorker

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.0.0
• 6.0.1
• 6.0.2
• 6.0.3
• 6.0.4
• 6.0.5
• 6.0.6

License

• open-source

Website

• Vendor: https://www.kernel.org/

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Once again VulDB remains the best source for vulnerability data.

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