CVEvulnerability
CVE-2026-92495
- Status
- Received
- Published
- 2026-09-17
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
RDMA/bnxt_re: Clear VM_MAYWRITE on DBR/toggle page mmap
bnxt_re_mmap() rejects VM_WRITE for the DBR_PAGE and TOGGLE_PAGE mmap
flags, but a read-only mapping can still retain VM_MAYWRITE. nd later
be upgraded with mprotect(PROT_WRITE). This can bypass the write check
that only runs at mmap time.
Clear VM_MAYWRITE before vm_insert_page() in the shared DBR/toggle-page
branch, matching the existing policy that userspace writes are not
expected for these pages.
References
- https://git.kernel.org/stable/c/0afbfe019c881483337d9f8304e678af05ebe7cc git.kernel.org
- https://git.kernel.org/stable/c/13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4 git.kernel.org
- https://git.kernel.org/stable/c/518df61b9b0a5b288dfa72c87246045329c18b8c git.kernel.org
- https://git.kernel.org/stable/c/5361fb1e5bc246f9a2c0721543f72c8dac200769 git.kernel.org
- https://git.kernel.org/stable/c/9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16 git.kernel.org