CVE-2024-27397 Affecting kernel-rt-core package, versions <0:4.18.0-553.8.1.rt7.349.el8_10


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-ALMALINUX8-KERNELRTCORE-7434277
  • published10 Jul 2024
  • disclosed17 Jul 2024

Introduced: 10 Jul 2024

CVE-2024-27397  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 kernel-rt-core to version 0:4.18.0-553.8.1.rt7.349.el8_10 or higher.
This issue was patched in ALSA-2024:4352.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-core package and not the kernel-rt-core package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

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

netfilter: nf_tables: use timestamp to check for set element timeout

Add a timestamp field at the beginning of the transaction, store it in the nftables per-netns area.

Update set backend .insert, .deactivate and sync gc path to use the timestamp, this avoids that an element expires while control plane transaction is still unfinished.

.lookup and .update, which are used from packet path, still use the current time to check if the element has expired. And .get path and dump also since this runs lockless under rcu read size lock. Then, there is async gc which also needs to check the current time since it runs asynchronously from a workqueue.

CVSS Scores

version 3.1