CVE-2026-46182
Published: May 28, 2026· Updated: May 28, 2026
Official 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.
Technical Analysis
CVE-2026-46182 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
Affected Vendors & Products
Exploit & PoC Resources
All References (3)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-46182 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts