CVE-2026-46315None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: io_uring/waitid: clear waitid info before copying it to userspace IORING_OP_WAITID stores its result fields in struct io_waitid::info and later copies them to userspac…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
io_uring/waitid: clear waitid info before copying it to userspace
IORING_OP_WAITID stores its result fields in struct io_waitid::info and later copies them to userspace siginfo. The prep path initializes the request arguments, but it does not initialize info itself.
If the wait operation completes without reporting a child event, the common wait code can return without writing wo_info. In that case io_waitid_finish() still copies iw->info to userspace, exposing stale bytes from the reused io_kiocb command storage.
Clear the result storage during prep so the io_uring path matches the regular waitid syscall, which uses a zero-initialized struct waitid_info.
Linux >= f31ecf671ddc498f20219453395794ff2383e06b < 954518e5a4a5efc5033253f6e36fc7b9f98363a3Linux >= f31ecf671ddc498f20219453395794ff2383e06b < b737c6612c60c23b40a9f31749b99e6f61943847Linux >= f31ecf671ddc498f20219453395794ff2383e06b < 4d2a0de611ab60d02fc768ae0cd5918b16bd5474Linux >= f31ecf671ddc498f20219453395794ff2383e06b < 93d93f5f8da791e98159795c6ef683f45bd95d13Linux 6.7Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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