kernel: skbuff: Fix a race between coalescing and releasing SKBs

In the Linux kernel, the following vulnerability has been resolved: skbuff: Fix a race between coalescing and releasing SKBs Commit 1effe8ca4e34 "skbuff: fix coalescing for pagepool fragment recycling" allowed coalescing to proceed with non page pool page and page pool page when @from is cloned,...

CVE-2025-21686

Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority...

CVE-2025-21686

The initial CVE-2025-21686 entry is marked as rejected, but connected sources describe a real Linux kernel issue related to io_uring: when cloning buffers between uring instances A and B that use different memory accounting contexts, closing A before B can decrement B’s pinned memory counters, po...

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 the Linux kernel that stems from the inability of the conntrack nfconfirm logic to handle cloned skb's referencing the same nfconn entry, whi...