CVE-2026-46182

Published: May 29, 2026Last modified: May 29, 2026

Description

In the Linux kernel, the following vulnerability has been resolved: pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace The hdr variable is allocated on the stack and only hdr.version and hdr.flags are initialized explicitly. Because the struct papr_hvpipe_hdr contains reserved padding bytes (reserved[3] and reserved2[40]), these could leak the uninitialized bytes to userspace after copy_to_user(). This patch fixes that by initializing the whole struct to 0.

Status

References

• https://git.kernel.org/stable/c/0479b6e9f999cc1cbad7d9f09f574fc387e605d5
• https://git.kernel.org/stable/c/cefeed44296261173a806bef988b26bc565da4be
• https://git.kernel.org/stable/c/f88f8e4485b437e0a2f96a7ff1f88aa22d925659