libceph: fix invalid accesses to ceph_connection_v1_info

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CVE-2025-39880

CVE-2025-39880 affects the Linux kernel’s libceph code path, specifically reading the ceph_connection_v1_info structure and writing into con->v1 union members without ensuring the active member (msgr1 vs msgr2). On 64-bit systems, con->v1.auth_retry overlaps con->v2.out_iter, which can y...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in Linux kernel that stems from memory leaks and invalid accesses that could lead to memory corruption...