# CVE-2021-47604: linux: In the Linux kernel, the following vulnerability has been resolved:  vduse: check that offset is within bounds in get...

CVE-2021-47604 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47604, released June 19, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-47604
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 19, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  vduse: check that offset is within bounds in get_config()  This condition checks "len" but it does not check "offset" and that could result in an out of bounds read if "offset > dev->config_size". The problem is that since both variables are unsigned the "dev->config_size - offset" subtraction would result in a very high unsigned value.  I think these checks might not be necessary because "len" and "offset" are supposed to already have been validated using the vhost_vdpa_config_validate() function.  But I do not know the code perfectly, and I like to be safe.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.15.15-1 | [DEBIAN-CVE-2021-47604](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47604.md) | Jun 19, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.15.15-1 | [DEBIAN-CVE-2021-47604](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47604.md) | Jun 19, 2024 |
| Linux | linux Debian 14 | 5.15.15-1 | [DEBIAN-CVE-2021-47604](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47604.md) | Jun 19, 2024 |

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