NULL pointer dereference in Linux kernel - CVE-2026-98270
Published: October 7, 2026
Vulnerability identifier: #VU153752
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-98270
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 nbio_v7_9_handle_ras_controller_intr_no_bifring() when handling an interrupt before the RAS context or PCIE_BIF RAS object is available. A local user can exploit an interrupt occurring during the initialization window to cause a denial of service.
The interrupt handler executes in hard-IRQ context.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98270
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/315c22712715491f0dfafdaf2c2b437540e68702
- https://git.kernel.org/stable/c/37583946d8751f8e285c467d770ac0b609b82a23
- https://git.kernel.org/stable/c/723d4dc628d764b19cf9efca14b82cca5ff020c9
- https://git.kernel.org/stable/c/b7c7f07a40037514f8e890aa00f8d7b196d680cf
- https://git.kernel.org/stable/c/fc5f845a291fc8175e6857cd6ad042818da192e8