CVE-2022-48806
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…
Does this matter?
Lower severity and a low EPSS score (0.28%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.28% probability · 21th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-190
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3937c35493ee2847aaefcfa5460e94b7443eef49Patch
- https://git.kernel.org/stable/c/9443ddeb3754e9e382a396b50adc1961301713cePatch
- https://git.kernel.org/stable/c/9a5f471ae380f9fcb9756d453c12ca1f8595a93cPatch
- https://git.kernel.org/stable/c/a37960df7eac3cc8094bd1ab84864e9e32c91345Patch
- https://git.kernel.org/stable/c/c0689e46be23160d925dca95dfc411f1a0462708Patch
- https://git.kernel.org/stable/c/3937c35493ee2847aaefcfa5460e94b7443eef49Patch
- https://git.kernel.org/stable/c/9443ddeb3754e9e382a396b50adc1961301713cePatch
- https://git.kernel.org/stable/c/9a5f471ae380f9fcb9756d453c12ca1f8595a93cPatch
- https://git.kernel.org/stable/c/a37960df7eac3cc8094bd1ab84864e9e32c91345Patch
- https://git.kernel.org/stable/c/c0689e46be23160d925dca95dfc411f1a0462708Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.