{"schema_version":"1.9.0","id":"CVE-2025-40046","published":"2025-10-28T11:48:24.022Z","modified":"2026-08-12T03:51:42.550230357Z","related":["openSUSE-SU-2025:15702-1","openSUSE-SU-2026:10301-1"],"summary":"io_uring/zcrx: fix overshooting recv limit","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/zcrx: fix overshooting recv limit\n\nIt's reported that sometimes a zcrx request can receive more than was\nrequested. It's caused by io_zcrx_recv_skb() adjusting desc->count for\nall received buffers including frag lists, but then doing recursive\ncalls to process frag list skbs, which leads to desc->count double\naccounting and underflow.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6699ec9a23f85f1764183430209c741847c45f12"},{"fixed":"8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4f"},{"fixed":"09cfd3c52ea76f43b3cb15e570aeddf633d65e80"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40046.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.15.0"},{"fixed":"6.17.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40046.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/09cfd3c52ea76f43b3cb15e570aeddf633d65e80"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40046.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40046"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40046.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"}]}