A use-after-free flaw was found in the Linux Kernel. When a disk is removed, bdi_unregister is called to stop further write-back and waits for associated delayed work to complete. However, wb_inode_writeback_end() may schedule bandwidth estimation work after this has completed, which can result in the timer attempting to access the recently freed bdi_writeback.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 2 - Kernel-5.15 Extra | kernel | 2022-09-30 07:10 | ALAS2KERNEL-5.15-2022-008 |
Amazon Linux 2023 | kernel | 2023-02-17 20:46 | ALAS2023-2023-070 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 4.5 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L |
NVD | CVSSv3 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |