CVE-2026-92495

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxea222485788208cd79bad42d25aae9232b33a934 < 5361fb1e5bc246f9a2c0721543f72c8dac200769affected
LinuxLinuxea222485788208cd79bad42d25aae9232b33a934 < 13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4affected
LinuxLinuxea222485788208cd79bad42d25aae9232b33a934 < 0afbfe019c881483337d9f8304e678af05ebe7ccaffected
LinuxLinuxea222485788208cd79bad42d25aae9232b33a934 < 518df61b9b0a5b288dfa72c87246045329c18b8caffected
LinuxLinuxea222485788208cd79bad42d25aae9232b33a934 < 9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16affected
LinuxLinux6.6affected
LinuxLinux0 < 6.6unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References