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Rewterz Threat Advisory – CVE-2021-44879 – Linux Kernel Vulnerability

Severity

Medium

Analysis Summary

CVE-2021-44879

Linux Kernel is vulnerable to a denial of service, caused by a move_data_page NULL pointer dereference flaw in the gc_data_segment function in fs/f2fs/gc.c. By persuading a victim to mount a specially-crafted image file, a remote attacker could exploit this vulnerability to cause a denial of service condition.

Impact

  • Denial of Service

Indicators of Compromise

CVE

  • CVE-2021-44879

Affected Vendors

Linux

Affected Products

  • Linux Kernel 5.16

Remediation

Upgrade to the latest version of Linux Kernel, available from the Linux Kernel GIT Repository.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9056d6489f5a41cfbb67f719d2c0ce61ead72d9f