CVE-2026-23342

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix race in cpumap on PREEMPTRT On PREEMPTRT kernels, the per-CPU xdpbulkqueue bq can be accessed concurrently by multiple preemptible tasks on the same CPU. The original code assumes bqenqueue and cpumapflush run atomically...

CVE-2026-23342

CVE-2026-23342 describes a race in the Linux kernel’s PREEMPT_RT path for BPF cpumap/xdp_bulk_queue. The issue arises when bq_enqueue() and __cpu_map_flush() run concurrently on the same CPU, breaking assumptions about atomicity and enabling races such as double __list_del_clearprev() and concurr...

CVE-2026-23342 bpf: Fix race in cpumap on PREEMPT_RT

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix race in cpumap on PREEMPTRT On PREEMPTRT kernels, the per-CPU xdpbulkqueue bq can be accessed concurrently by multiple preemptible tasks on the same CPU. The original code assumes bqenqueue and cpumapflush run atomically...

Linux kernel 安全漏洞

The Linux kernel is the kernel used by the Linux operating system developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from a race condition in the cpumap structure within the PREEMPTRT kernel. This vulnerability could lead to...

OESA-2026-1505 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: bpf, cpumap: Make sure kthread is running before map update returns The following warning was reported when running stress-mode enabled xdpredirectcpu with some ...

OESA-2026-1504 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: bpf, cpumap: Make sure kthread is running before map update returns The following warning was reported when running stress-mode enabled xdpredirectcpu with some ...

kernel: bpf, cpumap: Make sure kthread is running before map update returns

A race condition was found in the Linux kernel's BPF cpumap implementation in the kthread lifecycle management. A local user can trigger this issue by running XDP redirect operations when the per-CPU kthread is stopped prematurely before processing queued frames, causing the cleanup code to find ...