Out-of-bounds write in Linux kernel - CVE-2026-98029
Published: September 28, 2026
Vulnerability identifier: #VU152446
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98029
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause memory corruption or a denial of service.
The vulnerability exists due to missing bounds checking in nfp_net_get_fs_loc() when handling ETHTOOL_GRXCLSRLALL requests with a user-supplied rule count smaller than the number of flow steering rules. A local user can issue a crafted ioctl request to write rule locations beyond the caller-provided buffer.
Exploitation requires flow steering rules to have been installed; a rule count of zero leaves the rule-locations pointer NULL.
Affected software
Linux kernel
How to mitigate CVE-2026-98029
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3