CVE-2025-40046
io_uring/zcrx: fix overshooting recv limit
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Oct 28, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
6699ec9a23f85f1764183430209c741847c45f12 < 8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4f 6699ec9a23f85f1764183430209c741847c45f12 < 09cfd3c52ea76f43b3cb15e570aeddf633d65e80
Linux / Linux
6.15