Out-of-bounds read in Linux kernel - CVE-2026-89541
Published: September 12, 2026
Vulnerability identifier: #VU149260
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89541
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to read out-of-bounds memory.
The vulnerability exists due to improper length validation in gss_unwrap_resp_priv() when processing a crafted RPCSEC_GSS reply. A remote attacker can return a crafted RPCSEC_GSS reply from a krb5p NFS server to read out-of-bounds memory.
Affected software
Linux kernel
How to mitigate CVE-2026-89541
Install security update from vendor's repository.