NULL Pointer Dereference Affecting kernel package, versions <0:4.18.0-372.75.1.el8_6


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (15th percentile)

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  • Snyk IDSNYK-RHEL8-KERNEL-5956111
  • published1 Mar 2023
  • disclosed9 Aug 2022

Introduced: 9 Aug 2022

CVE-2023-1095  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel to version 0:4.18.0-372.75.1.el8_6 or higher.
This issue was patched in RHSA-2023:5627.

NVD Description

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

In nf_tables_updtable, if nf_tables_table_enable returns an error, nft_trans_destroy is called to free the transaction object. nft_trans_destroy() calls list_del(), but the transaction was never placed on a list -- the list head is all zeroes, this results in a NULL pointer dereference.

CVSS Scores

version 3.1