Incorrect authorization in Linux kernel - CVE-2026-93206
Published: September 25, 2026
Vulnerability identifier: #VU152194
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93206
CWE-ID: CWE-863
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to disclose PCI configuration-space information.
The vulnerability exists due to improper authorization using the credentials of the calling task rather than the opening process in proc_bus_pci_read() when reading PCI configuration space through procfs. A local privileged user can pass a file descriptor opened with CAP_SYS_ADMIN to an unprivileged process to disclose PCI configuration-space information.
Affected software
Linux kernel
How to mitigate CVE-2026-93206
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/53407535d49ec034e476121020b5c878f0d92e18
- https://git.kernel.org/stable/c/5c7ab4ca66f0880cffc3735555ea719dd5253726
- https://git.kernel.org/stable/c/6351e94076329dab517ea94c115e15c4d8459381
- https://git.kernel.org/stable/c/77272b7fd0e472086fd626a1fcd11da625822cc2
- https://git.kernel.org/stable/c/8a3a54aa3e65ed76f8560a387243a7738ae0cb1c
- https://git.kernel.org/stable/c/c2d4174f492458ecdcdef309243624999612d526
- https://git.kernel.org/stable/c/e7730acd6a01c5931a3afb83639810ff2fb9cc92
- https://git.kernel.org/stable/c/f82f53e75eff382fc8f56b73279b54f7cf5a5c65