# CVE-2023-52494: linux: In the Linux kernel, the following vulnerability has been resolved:  bus: mhi: host: Add alignment check for event ri...

CVE-2023-52494 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52494, released March 11, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-52494
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 11, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  bus: mhi: host: Add alignment check for event ring read pointer  Though we do check the event ring read pointer by "is_valid_ring_ptr" to make sure it is in the buffer range, but there is another risk the pointer may be not aligned.  Since we are expecting event ring elements are 128 bits(struct mhi_ring_element) aligned, an unaligned read pointer could lead to multiple issues like DoS or ring buffer memory corruption.  So add a alignment check for event ring read pointer.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.76-1 | [DEBIAN-CVE-2023-52494](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52494.md) | Mar 11, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.6.15-1 | [DEBIAN-CVE-2023-52494](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52494.md) | Mar 11, 2024 |
| Linux | linux Debian 14 | 6.6.15-1 | [DEBIAN-CVE-2023-52494](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52494.md) | Mar 11, 2024 |

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