{"id":"CVE-2026-46315","summary":"io_uring/waitid: clear waitid info before copying it to userspace","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/waitid: clear waitid info before copying it to userspace\n\nIORING_OP_WAITID stores its result fields in struct io_waitid::info and\nlater copies them to userspace siginfo. The prep path initializes the\nrequest arguments, but it does not initialize info itself.\n\nIf the wait operation completes without reporting a child event, the common\nwait code can return without writing wo_info. In that case io_waitid_finish()\nstill copies iw-\u003einfo to userspace, exposing stale bytes from the reused\nio_kiocb command storage.\n\nClear the result storage during prep so the io_uring path matches the\nregular waitid syscall, which uses a zero-initialized struct waitid_info.","modified":"2026-07-10T03:54:30.781324849Z","published":"2026-06-09T07:38:13.713Z","related":["SUSE-SU-2026:2799-1","SUSE-SU-2026:2800-1","openSUSE-SU-2026:11014-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46315.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4d2a0de611ab60d02fc768ae0cd5918b16bd5474"},{"type":"WEB","url":"https://git.kernel.org/stable/c/93d93f5f8da791e98159795c6ef683f45bd95d13"},{"type":"WEB","url":"https://git.kernel.org/stable/c/954518e5a4a5efc5033253f6e36fc7b9f98363a3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b737c6612c60c23b40a9f31749b99e6f61943847"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46315.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46315"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f31ecf671ddc498f20219453395794ff2383e06b"},{"fixed":"954518e5a4a5efc5033253f6e36fc7b9f98363a3"},{"fixed":"b737c6612c60c23b40a9f31749b99e6f61943847"},{"fixed":"4d2a0de611ab60d02fc768ae0cd5918b16bd5474"},{"fixed":"93d93f5f8da791e98159795c6ef683f45bd95d13"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46315.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.92"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.34"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46315.json"}}],"schema_version":"1.7.5"}