Use After Free Affecting kernel-rt package, versions <0:3.10.0-229.7.2.rt56.141.6.el7_1


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.04% (6th percentile)

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  • Snyk ID SNYK-RHEL7-KERNELRT-4599583
  • published 26 Jul 2021
  • disclosed 16 Jan 2015

How to fix?

Upgrade RHEL:7 kernel-rt to version 0:3.10.0-229.7.2.rt56.141.6.el7_1 or higher.
This issue was patched in RHSA-2015:1139.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

The nft_flush_table function in net/netfilter/nf_tables_api.c in the Linux kernel before 3.18.5 mishandles the interaction between cross-chain jumps and ruleset flushes, which allows local users to cause a denial of service (panic) by leveraging the CAP_NET_ADMIN capability.

CVSS Scores

version 3.1
Expand this section

Red Hat

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