CVE-2024-27023

medium

Description

In the Linux kernel, the following vulnerability has been resolved: md: Fix missing release of 'active_io' for flush submit_flushes atomic_set(&mddev->flush_pending, 1); rdev_for_each_rcu(rdev, mddev) atomic_inc(&mddev->flush_pending); bi->bi_end_io = md_end_flush submit_bio(bi); /* flush io is done first */ md_end_flush if (atomic_dec_and_test(&mddev->flush_pending)) percpu_ref_put(&mddev->active_io) -> active_io is not released if (atomic_dec_and_test(&mddev->flush_pending)) -> missing release of active_io For consequence, mddev_suspend() will wait for 'active_io' to be zero forever. Fix this problem by releasing 'active_io' in submit_flushes() if 'flush_pending' is decreased to zero.

References

https://git.kernel.org/stable/c/855678ed8534518e2b428bcbcec695de9ba248e8

https://git.kernel.org/stable/c/6b2ff10390b19a2364af622b6666b690443f9f3f

https://git.kernel.org/stable/c/11f81438927f84edfaaeb5d5f10856c3a1c1fc82

https://git.kernel.org/stable/c/02dad157ba11064d073f5499dc33552b227d5d3a

Details

Source: Mitre, NVD

Published: 2024-05-01

Updated: 2024-05-01

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium