#VU104629 NULL pointer dereference in Linux kernel - CVE-2022-49096

Vulnerability identifier: #VU104629

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49096

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the efx_remove_channels(), efx_realloc_channels() and efx_set_channels() functions in drivers/net/ethernet/sfc/efx_channels.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/059a47f1da93811d37533556d67e72f2261b1127
https://git.kernel.org/stable/c/b8c46bc358d84701e7f7ffa054037db25f25da0e
https://git.kernel.org/stable/c/dcc85e1593686e42c6749ef3d356db34759d59e8
https://git.kernel.org/stable/c/ed7a824fda8732578d1014fad1f7fb0363705090

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.