# CVE-2022-49749: linux: In the Linux kernel, the following vulnerability has been resolved:  i2c: designware: use casting of u64 in clock mul...

CVE-2022-49749 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49749, released March 27, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49749
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 27, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  i2c: designware: use casting of u64 in clock multiplication to avoid overflow  In functions i2c_dw_scl_lcnt() and i2c_dw_scl_hcnt() may have overflow by depending on the values of the given parameters including the ic_clk. For example in our use case where ic_clk is larger than one million, multiplication of ic_clk * 4700 will result in 32 bit overflow.  Add cast of u64 to the calculation to avoid multiplication overflow, and use the corresponding define for divide.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.11-1 | [DEBIAN-CVE-2022-49749](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49749.md) | Mar 27, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.11-1 | [DEBIAN-CVE-2022-49749](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49749.md) | Mar 27, 2025 |
| Linux | linux Debian 14 | 6.1.11-1 | [DEBIAN-CVE-2022-49749](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49749.md) | Mar 27, 2025 |

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