CVE-2026-93288 Affecting kernel-tools package, versions <0:5.14.0-687.56.1.el9_8


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-ORACLE9-KERNELTOOLS-20884113
  • published13 Oct 2026
  • disclosed24 Sept 2026

Introduced: 24 Sep 2026

NewCVE-2026-93288  (opens in a new tab)

How to fix?

Upgrade Oracle:9 kernel-tools to version 0:5.14.0-687.56.1.el9_8 or higher.
This issue was patched in ELSA-2026-76739.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

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

netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state

sashiko reports: "nfnl_log_net_exit() calls nf_log_unset(), which clears the logger pointer without an RCU grace period. Immediately after, ops_free_list() frees the per-net state while concurrent packets might still be executing nf_log_packet() under rcu_read_lock()."

Clear the pointer via .pre_exit to make sure rcu readers have completed before pernet storage is free'd. The change in nf_log_syslog.c is only done for consistency: it doesn't use pernet data.

CVSS Base Scores

version 3.1