CVE-2026-89793

In the Linux kernel, the following vulnerability has been resolved: ublk: clear VMMAYWRITE on read-only ublk char device mmap ublkchmmap rejects mmap requests with VMWRITE set, but never clears VMMAYWRITE on the resulting read-only mapping. This allows a userspace daemon to mmap the per-queue...

CVE-2026-89793

CVE-2026-89793 affects the Linux kernel ublk subsystem. The function ublk_ch_mmap() rejects mmap requests with VM_WRITE set but fails to clear VM_MAYWRITE on the resulting read-only mapping. An unprivileged userspace daemon can exploit this by mapping the per-queue command buffer with PROT_READ a...