Ubuntu: (CVE-2022-48846): linux-hwe-5.15 vulnerability

Ubuntu: (CVE-2022-48846): linux-hwe-5.15 vulnerability

Severity

5

CVSS

(AV:L/AC:L/Au:S/C:N/I:N/A:C)

Published

07/16/2024

Created

11/21/2024

Added

11/19/2024

Modified

02/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved: block: release rq qos structures for queue without disk blkcg_init_queue() may add rq qos structures to request queue, previously blk_cleanup_queue() calls rq_qos_exit() to release them, but commit 8e141f9eb803 ("block: drain file system I/O on del_gendisk") moves rq_qos_exit() into del_gendisk(), so memory leak is caused because queues may not have disk, such as un-present scsi luns, nvme admin queue, ... Fixes the issue by adding rq_qos_exit() to blk_cleanup_queue() back. BTW, v5.18 won't need this patch any more since we move blkcg_init_queue()/blkcg_exit_queue() into disk allocation/release handler, and patches have been in for-5.18/block.

Solution(s)

• ubuntu-upgrade-linux-azure-5-15
• ubuntu-upgrade-linux-hwe-5-15
• ubuntu-upgrade-linux-intel-iotg
• ubuntu-upgrade-linux-intel-iotg-5-15
• ubuntu-upgrade-linux-lowlatency-hwe-5-15
• ubuntu-upgrade-linux-raspi
• ubuntu-upgrade-linux-realtime

References

• https://attackerkb.com/topics/cve-2022-48846
• CVE - 2022-48846
• https://git.kernel.org/linus/daaca3522a8e67c46e39ef09c1d542e866f85f3b
• https://git.kernel.org/stable/c/60c2c8e2ef3a3ec79de8cbc80a06ca0c21df8c29
• https://git.kernel.org/stable/c/d4ad8736ac982111bb0be8306bf19c8207f6600e
• https://git.kernel.org/stable/c/daaca3522a8e67c46e39ef09c1d542e866f85f3b
• https://www.cve.org/CVERecord?id=CVE-2022-48846