CVE-2024-46840 Affecting kernel-modules-extra package, versions <0:6.1.111-120.187.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNELMODULESEXTRA-8321150
  • published1 Nov 2024
  • disclosed27 Sept 2024

Introduced: 27 Sep 2024

CVE-2024-46840  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel-modules-extra to version 0:6.1.111-120.187.amzn2023 or higher.
This issue was patched in ALAS2023-2024-755.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-modules-extra package and not the kernel-modules-extra package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

btrfs: clean up our handling of refs == 0 in snapshot delete

In reada we BUG_ON(refs == 0), which could be unkind since we aren't holding a lock on the extent leaf and thus could get a transient incorrect answer. In walk_down_proc we also BUG_ON(refs == 0), which could happen if we have extent tree corruption. Change that to return -EUCLEAN. In do_walk_down() we catch this case and handle it correctly, however we return -EIO, which -EUCLEAN is a more appropriate error code. Finally in walk_up_proc we have the same BUG_ON(refs == 0), so convert that to proper error handling. Also adjust the error message so we can actually do something with the information.

CVSS Scores

version 3.1