CVE-2026-92495
Published: September 19, 2026Last modified: September 28, 2026
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.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
| 25 LTS | linux-lts | Fixed (6.12.111-r0) | |
| Stream | linux-lts | Fixed (6.18.53-r0) |
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