Time-of-check Time-of-use (TOCTOU) Affecting kernel-rt-modules package, versions <0:4.18.0-553.173.1.rt7.514.el8_10


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.1% (1st percentile)

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  • Snyk IDSNYK-ROCKY8-KERNELRTMODULES-20999165
  • published16 Oct 2026
  • disclosed25 Apr 2026

Introduced: 25 Apr 2026

CVE-2026-31678  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 kernel-rt-modules to version 0:4.18.0-553.173.1.rt7.514.el8_10 or higher.
This issue was patched in RLSA-2026:82806.

NVD Description

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

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

openvswitch: defer tunnel netdev_put to RCU release

ovs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already detached the device. Dropping the netdev reference in destroy can race with concurrent readers that still observe vport->dev.

Do not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let vport_netdev_free() drop the reference from the RCU callback, matching the non-tunnel destroy path and avoiding additional synchronization under RTNL.

CVSS Base Scores

version 3.1