NULL pointer dereference in Linux kernel - CVE-2026-98063
Published: September 28, 2026
Vulnerability identifier: #VU152396
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98063
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in btf_var_show() when bpf_snprintf_btf() renders a BTF_KIND_VAR from base vmlinux BTF. A local user can load and run a BPF program that passes the type ID of a BTF_KIND_VAR to bpf_snprintf_btf() to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-98063
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3