# CVE-2022-48806: linux: In the Linux kernel, the following vulnerability has been resolved:  eeprom: ee1004: limit i2c reads to I2C_SMBUS_BLO...

CVE-2022-48806 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48806, released July 16, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48806
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 16, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.16.10-1 | [DEBIAN-CVE-2022-48806](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48806.md) | Jul 16, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.16.10-1 | [DEBIAN-CVE-2022-48806](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48806.md) | Jul 16, 2024 |
| Linux | linux Debian 14 | 5.16.10-1 | [DEBIAN-CVE-2022-48806](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48806.md) | Jul 16, 2024 |

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