CVE-2026-46182

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

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