#VU62483 NULL pointer dereference


Published: 2022-04-21

Vulnerability identifier: #VU62483

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-44879

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

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

Vendor:

Description

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

The vulnerability exists due to a NULL pointer dereference error in the gc_data_segment() function in fs/f2fs/gc.c. A local user can mount a specially crafted f2fs image, trigger a NULL pointer dereference and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions


External links
http://bugzilla.kernel.org/show_bug.cgi?id=215231
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.3
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9056d6489f5a41cfbb67f719d2c0ce61ead72d9f
http://lore.kernel.org/linux-f2fs-devel/20211206144421.3735-3-chao@kernel.org/T/


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


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