Use After Free Affecting kernel-cross-headers package, versions <0:4.18.0-193.87.1.el8_2


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.19% (58th percentile)

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  • Snyk ID SNYK-RHEL8-KERNELCROSSHEADERS-4079807
  • published 6 Jul 2022
  • disclosed 31 May 2022

How to fix?

Upgrade RHEL:8 kernel-cross-headers to version 0:4.18.0-193.87.1.el8_2 or higher.
This issue was patched in RHSA-2022:5220.

NVD Description

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

net/netfilter/nf_tables_api.c in the Linux kernel through 5.18.1 allows a local user (able to create user/net namespaces) to escalate privileges to root because an incorrect NFT_STATEFUL_EXPR check leads to a use-after-free.

References

CVSS Scores

version 3.1
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NVD

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

7.8 high
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SUSE

7.8 high