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CVE-2024-27397 Affecting perf package, versions <0:4.18.0-477.64.1.el8_8

Severity

 Recommended
medium

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.04% (12th percentile)

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  • Snyk ID SNYK-RHEL8-PERF-7556866
  • published 24 Jul 2024
  • disclosed 8 May 2024
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Introduced: 8 May 2024

CVE-2024-27397 Open this link in a new tab

How to fix?

Upgrade RHEL:8 perf to version 0:4.18.0-477.64.1.el8_8 or higher.
This issue was patched in RHSA-2024:4740.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL. See How to fix? for RHEL: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
Expand this section

Red Hat

7 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High