Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.7, < 6.12.92 |
References
- https://git.kernel.org/stable/c/4d2a0de611ab60d02fc768ae0cd5918b16bd5474Patch
- https://git.kernel.org/stable/c/93d93f5f8da791e98159795c6ef683f45bd95d13Patch
- https://git.kernel.org/stable/c/954518e5a4a5efc5033253f6e36fc7b9f98363a3Patch
- https://git.kernel.org/stable/c/b737c6612c60c23b40a9f31749b99e6f61943847Patch
FAQ
What is CVE-2026-46315?
CVE-2026-46315 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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::i...
How severe is CVE-2026-46315?
CVE-2026-46315 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46315?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.