powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak (CVE-2026-80571) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80571

powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak

Answer in brief

CVE-2026-80571 records a Unknown severity vulnerability in powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak. 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.

Published Aug 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

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.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=86900ab620a42396a749b506d4a187820fc3fabe <828a8d1a9107aec6353d896882df8383accf7e80 \|\| >=86900ab620a42396a749b506d4a187820fc3fabe <ed98ce338f9a65c90cb930b088f1eb36de7181af \|\| >=86900ab620a42396a749b506d4a187820fc3fabe <5b17f3f34391372faf03e79d947e0c50ab6dd258	828a8d1a9107aec6353d896882df8383accf7e80, ed98ce338f9a65c90cb930b088f1eb36de7181af, 5b17f3f34391372faf03e79d947e0c50ab6dd258
Linux/Linuxgeneric	6.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 828a8d1a9107aec6353d896882df8383accf7e80 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak In papr_phy_attest_create_handle(), the params->cmd.length is not validated before use, which can result in a buffer overlow. Check it and return -EINVAL if it is either 0 or exceeds sizeof(params->cmd). Also, params is freed on the success path but not error. Free it on errors after memory allocation. And free it on negative fd.

Quoted source text, attributed separately from HOL analysis.