NULL pointer dereference in Linux kernel - CVE-2026-80917
Published: September 9, 2026
Vulnerability identifier: #VU148844
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-2026-80917
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 the generic PCI host CAM operations when enumerating PCI buses on 32-bit CAM systems. A local user can trigger PCI configuration-space access during bus enumeration to cause a denial of service.
Only 32-bit hosts using the "pci-host-cam-generic" compatible are affected.
Affected software
Linux kernel
How to mitigate CVE-2026-80917
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/008cb88edb41f3c7c8e0ed763ff9f26719830984
- https://git.kernel.org/stable/c/0916948026f623844acd08888f7cbedbf1c48d6b
- https://git.kernel.org/stable/c/0c55707bd5d0d7670704cfd0dda933809b052f67
- https://git.kernel.org/stable/c/5e52eb0290f66ba0732956dcb1e365b5ca3c5108
- https://git.kernel.org/stable/c/74456843f18ba7f3045974d7e8b88ab993152b8c
- https://git.kernel.org/stable/c/8d08713ec83a18526d1ed1fd5f0d2b901d103a10
- https://git.kernel.org/stable/c/a199293f3038db8d31d47aa60f1e18272cd82354
- https://git.kernel.org/stable/c/baf9b0383ff770fdff123d3a832f3a99641d96dd