---
cve: "CVE-2026-46315"
severity: "LOW"
cvss: 3.1
epss: "11%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-06-09 09:16:30"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T03:59:15+02:00"
---

# CVE-2026-46315

> 3.1 LOW

## Beschreibung

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.

## Patch verfügbar (OSV)

- Kernel ≥ 6.12.92
- Kernel ≥ 6.18.34
- Kernel ≥ 7.0.11

## Referenzen

- <https://git.kernel.org/stable/c/954518e5a4a5efc5033253f6e36fc7b9f98363a3>
- <https://git.kernel.org/stable/c/b737c6612c60c23b40a9f31749b99e6f61943847>
- <https://git.kernel.org/stable/c/4d2a0de611ab60d02fc768ae0cd5918b16bd5474>
- <https://git.kernel.org/stable/c/93d93f5f8da791e98159795c6ef683f45bd95d13>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-46315) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_