CVE-2022-48806

Summary

In the Linux kernel, the following vulnerability has been resolved:

eeprom: ee1004: limit i2c reads to I2C_SMBUS_BLOCK_MAX

Commit effa453168a7 ("i2c: i801: Don't silently correct invalid transfer size") revealed that ee1004_eeprom_read() did not properly limit how many bytes to read at once.

In particular, i2c_smbus_read_i2c_block_data_or_emulated() takes the length to read as an u8. If count == 256 after taking into account the offset and page boundary, the cast to u8 overflows. And this is common when user space tries to read the entire EEPROM at once.

To fix it, limit each read to I2C_SMBUS_BLOCK_MAX (32) bytes, already the maximum length i2c_smbus_read_i2c_block_data_or_emulated() allows.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxaca56c298e2a6d20ab6308e203a8d37f2a7759d3 < 3937c35493ee2847aaefcfa5460e94b7443eef49affected
LinuxLinux25714ad6bf5e98025579fa4c08ff2041a663910c < a37960df7eac3cc8094bd1ab84864e9e32c91345affected
LinuxLinuxbe9313f755a7bfa02230b15731d07074d5255ecb < 9a5f471ae380f9fcb9756d453c12ca1f8595a93caffected
LinuxLinux07d9beb6e3c2e852e884113d6803ea4b3643ae38 < 9443ddeb3754e9e382a396b50adc1961301713ceaffected
LinuxLinuxeffa453168a7eeb8a562ff4edc1dbf9067360a61 < c0689e46be23160d925dca95dfc411f1a0462708affected
LinuxLinux74650c34f93044d3ab441235f161f9e1e761e96baffected
LinuxLinuxa126a8c3dd51519513141b4fc94fd4813bca2c0faffected
LinuxLinux202d0e22fe512df0f1cb6253d40ce1058e373247affected
LinuxLinux7414af7bdad9a9cddb3a765ca98ea207048618c5affected
LinuxLinux4.4.300 < 4.5affected
LinuxLinux4.9.298 < 4.10affected
LinuxLinux4.14.263 < 4.15affected
LinuxLinux4.19.226 < 4.20affected
LinuxLinux5.4.174 < 5.4.180affected
LinuxLinux5.10.94 < 5.10.101affected
LinuxLinux5.15.17 < 5.15.24affected
LinuxLinux5.16.3 < 5.16.10affected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References