Answer in brief
CVE-2026-46182 records a Unknown severity vulnerability in pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86 <0479b6e9f999cc1cbad7d9f09f574fc387e605d5 || >=cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86 <f88f8e4485b437e0a2f96a7ff1f88aa22d925659 || >=cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86 <cefeed44296261173a806bef988b26bc565da4be | 0479b6e9f999cc1cbad7d9f09f574fc387e605d5, f88f8e4485b437e0a2f96a7ff1f88aa22d925659, cefeed44296261173a806bef988b26bc565da4be |
| Linux/Linuxgeneric | 6.18 | Not reported |
Published upstream
May 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.