CVE-2022-49749
i2c: designware: use casting of u64 in clock multiplication to avoid overflow
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
Published
- 14 months later
· 14 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 2373f6b9744d5373b886f3ce1a985193cca0a356 – < ed173f77fd28a3e4fffc13b3f28687b9eba61157
- affected 2373f6b9744d5373b886f3ce1a985193cca0a356 – < 2f29d780bd691d20e89e5b35d5e6568607115e94
- affected 2373f6b9744d5373b886f3ce1a985193cca0a356 – < 9f36aae9e80e79b7a6d62227eaa96935166be9fe
- affected 2373f6b9744d5373b886f3ce1a985193cca0a356 – < c8c37bc514514999e62a17e95160ed9ebf75ca8d
- affected 3.2
- unaffected < 3.2
- unaffected 5.10.166 – ≤ 5.10.*
- unaffected 5.15.91 – ≤ 5.15.*
- unaffected 6.1.9 – ≤ 6.1.*
- unaffected 6.2 – ≤ *
References (4)
- https://git.kernel.org/stable/c/ed173f77fd28a3e4fffc13b3f28687b9eba61157 (opens in a new tab)
- https://git.kernel.org/stable/c/2f29d780bd691d20e89e5b35d5e6568607115e94 (opens in a new tab)
- https://git.kernel.org/stable/c/9f36aae9e80e79b7a6d62227eaa96935166be9fe (opens in a new tab)
- https://git.kernel.org/stable/c/c8c37bc514514999e62a17e95160ed9ebf75ca8d (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49749)Record last updated .