Vulnerability Description
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.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/09cfd3c52ea76f43b3cb15e570aeddf633d65e80
- https://git.kernel.org/stable/c/8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4f
FAQ
What is CVE-2025-40046?
CVE-2025-40046 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 c...
How severe is CVE-2025-40046?
CVE-2025-40046 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-40046?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.