Ubuntu 21.04 and 20.04 LTS Users Get New Linux Kernel Security Update, Patch Now

Posted by hanuca on Oct 20, 2021 2:22 PM EST
9to5Linux; By Marius Nestor
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Canonical published a new Linux kernel security update for Ubuntu 21.04 and Ubuntu 20.04 LTS systems running Linux kernel 5.11 to address a total of eight security vulnerabilities.

Coming only three weeks after the previous kernel security update, the new one is currently only available for Ubuntu 21.04 (Hirsute Hippo) and Ubuntu 20.04.3 LTS (Focal Fossa) systems running the Linux 5.11 kernel series, and it’s available for all supported architectures and kernel flavors that Ubuntu supports.

In this new Ubuntu kernel security patch, there’s a fix for CVE-2021-3732, a flaw discovered by Alois Wohlschlager in the overlay file system that could allow an attacker to expose sensitive information, CVE-2021-3739, a security issue discovered in the Btrfs file system, which could allow an attacker with CAP_SYS_ADMIN to cause a denial of service, and CVE-2021-40490, a race condition discovered in the EXT4 file system that could allow a local attacker to cause a denial of service or gain administrative privileges.

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