CVE-2026-80724

A flaw was found in the Linux kernel's vmclock component. This vulnerability allows a guest operating system, through a userspace process, to change a shared memory page from read-only to writable. This occurs because the vmclockmiscdevmmap function fails to properly restrict permission upgrades...

CVE-2026-80724

In the Linux kernel, the following vulnerability has been resolved: ptp: vmclock: prevent read-only mappings from becoming writable vmclockmiscdevmmap rejects writable mappings of the shared vmclock ABI page with -EROFS, but leaves VMMAYWRITE set. Userspace can map the page read-only and then...