SB20261023122 - Use-after-free in Linux kernel ethernet ibm driver

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Main Vulnerability Database SB20261023122

SB20261023122 - Use-after-free in Linux kernel ethernet ibm driver

Published: October 23, 2026

Security Bulletin ID SB20261023122
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-99045)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to potentially cause memory corruption or a denial of service.

The vulnerability exists due to a use-after-free condition in the ibmveth driver's ibmveth_open() error-handling path when receive buffer pool allocation fails after logical LAN registration. A local privileged user can trigger this failure path to leave the Power Hypervisor (PHYP) referencing a buffer-list page after it is unmapped, potentially causing memory corruption or a system crash.


Remediation

Install update from vendor's website.

References