In the Linux kernel, the following vulnerability has been resolved: um: Fix potential race condition in TLB sync During the TLB sync, we need to traverse and modify the page table, so we should hold the page table lock. Since full SMP support for threads within the same process is still missing, let's disable the split page table lock for simplicity.

A flaw was found in the Linux kernel. A race condition can occur during Translation Lookaside Buffer (TLB) synchronization when the page table is traversed and modified without properly holding the necessary page table lock. This vulnerability may allow for unpredictable system behavior or instability due to concurrent access to shared resources.

Red Hat Enterprise Linux 10 Not affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-53020 https://nvd.nist.gov/vuln/detail/CVE-2026-53020 https://lore.kernel.org/linux-cve-announce/2026062452-CVE-2026-53020-6e28@gregkh/T