SB20260917173 - NULL pointer dereference in Linux kernel sunrpc

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Main Vulnerability Database SB20260917173

SB20260917173 - NULL pointer dereference in Linux kernel sunrpc

Published: September 17, 2026

Security Bulletin ID SB20260917173
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2026-89784)

CWE-ID: CWE-476 - NULL Pointer Dereference

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


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a null pointer dereference in rpcb_register_inet4() and rpcb_register_inet6() when an in-kernel RPC service registers with the local rpcbind after an address-string allocation fails. A local user can cause an in-kernel RPC service to register with the local rpcbind to cause a denial of service.

Exploitation requires sufficient memory pressure for a small GFP_KERNEL allocation to fail.


Remediation

Install update from vendor's website.

References