CVE-2025-40046 — io_uring/zcrx: fix overshooting recv limit
In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix overshooting recv limit It's reported that sometimes a zcrx request can receive more tha…
Published: 2025-10-28 · CVSS: 8.6 · CVSS 3.1
In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix overshooting recv limit It's reported that sometimes a zcrx request can receive more than was requested. It's caused by io_zcrx_recv_skb() adjusting desc->count for all received buffers including frag lists, but then doing recursive calls to process frag list skbs, which leads to desc->count double accounting and underflow.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7