Incorrect permission assignment for critical resource in Linux kernel - CVE-2026-92495
Published: September 18, 2026
Vulnerability identifier: #VU151028
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92495
CWE-ID: CWE-732
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to gain unintended write access to DBR or toggle pages.
The vulnerability exists due to improper permission assignment in bnxt_re_mmap when changing a read-only DBR or toggle page mapping to writable with mprotect. A local user can retain VM_MAYWRITE on the mapping to gain unintended write access to DBR or toggle pages.
Affected software
Linux kernel
How to mitigate CVE-2026-92495
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/0afbfe019c881483337d9f8304e678af05ebe7cc
- https://git.kernel.org/stable/c/13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4
- https://git.kernel.org/stable/c/518df61b9b0a5b288dfa72c87246045329c18b8c
- https://git.kernel.org/stable/c/5361fb1e5bc246f9a2c0721543f72c8dac200769
- https://git.kernel.org/stable/c/9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16