This update for the Linux Kernel 4.4.180-94_135 fixes one issue. The following security issues were fixed: - CVE-2021-28688: Fixed an issue introduced by XSA-365 . - CVE-2021-26930: Fixed an improper error handling in blkback"s grant mapping . - CVE-2021-26931: Fixed an issue where Linux kernel was treating grant mapping errors as bugs .