CVE-2024-27023 Affecting kernel-debug package, versions <0:5.14.0-503.11.1.el9_5


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-ORACLE9-KERNELDEBUG-8398127
  • published20 Nov 2024
  • disclosed1 May 2024

Introduced: 1 May 2024

CVE-2024-27023  (opens in a new tab)

How to fix?

Upgrade Oracle:9 kernel-debug to version 0:5.14.0-503.11.1.el9_5 or higher.
This issue was patched in ELSA-2024-9315.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug package and not the kernel-debug package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

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.

CVSS Scores

version 3.1