CVE-2026-23254 Affecting kernel-uek-modules-wireless package, versions <0:6.12.0-204.92.4.2.el9uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.11% (2nd percentile)

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  • Snyk IDSNYK-ORACLE9-KERNELUEKMODULESWIRELESS-17867372
  • published6 Jul 2026
  • disclosed18 Mar 2026

Introduced: 18 Mar 2026

CVE-2026-23254  (opens in a new tab)

How to fix?

Upgrade Oracle:9 kernel-uek-modules-wireless to version 0:6.12.0-204.92.4.2.el9uek or higher.
This issue was patched in ELSA-2026-50372.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-modules-wireless package and not the kernel-uek-modules-wireless 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:

net: gro: fix outer network offset

The udp GRO complete stage assumes that all the packets inserted the RX have the encapsulation flag zeroed. Such assumption is not true, as a few H/W NICs can set such flag when H/W offloading the checksum for an UDP encapsulated traffic, the tun driver can inject GSO packets with UDP encapsulation and the problematic layout can also be created via a veth based setup.

Due to the above, in the problematic scenarios, udp4_gro_complete() uses the wrong network offset (inner instead of outer) to compute the outer UDP header pseudo checksum, leading to csum validation errors later on in packet processing.

Address the issue always clearing the encapsulation flag at GRO completion time. Such flag will be set again as needed for encapsulated packets by udp_gro_complete().

CVSS Base Scores

version 3.1