Out-of-bounds read in Linux kernel - CVE-2026-89698
Published: September 12, 2026
Vulnerability identifier: #VU149115
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89698
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in nfsd_genl_rpc_status_compose_msg() when handling IPv6 NFS client addresses. A local user can request RPC status information through the generic netlink interface to disclose sensitive information.
The IPv6 netlink address attributes can include rq_flags data in place of part of an IPv6 address.
Affected software
Linux kernel
How to mitigate CVE-2026-89698
Install security update from vendor's repository.