CVE-2022-49749

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2373f6b9744d5373b886f3ce1a985193cca0a356 < ed173f77fd28a3e4fffc13b3f28687b9eba61157affected
LinuxLinux2373f6b9744d5373b886f3ce1a985193cca0a356 < 2f29d780bd691d20e89e5b35d5e6568607115e94affected
LinuxLinux2373f6b9744d5373b886f3ce1a985193cca0a356 < 9f36aae9e80e79b7a6d62227eaa96935166be9feaffected
LinuxLinux2373f6b9744d5373b886f3ce1a985193cca0a356 < c8c37bc514514999e62a17e95160ed9ebf75ca8daffected
LinuxLinux3.2affected
LinuxLinux0 < 3.2unaffected
LinuxLinux5.10.166 <= 5.10.*unaffected
LinuxLinux5.15.91 <= 5.15.*unaffected
LinuxLinux6.1.9 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References