eeprom: ee1004: limit i2c reads to I2C_SMBUS_BLOCK_MAX
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 4.4.300 to before 4.5; 4.9.298 to before 4.10; 4.14.263 to before 4.15; 4.19.226 to before 4.20 | 4.5, 4.10, 4.15, 4.20 | Patch available | CNA |
| Linux | Linux | 5.4.174 to before 5.4.180; 5.10.94 to before 5.10.101; 5.15.17 to before 5.15.24; 5.16.3 to before 5.16.10 | 5.4.180, 5.10.101, 5.15.24, 5.16.10 | Patch available | CNA |
- Linux VendorLinux Affected 4.4.300 to before 4.5; 4.9.298 to before 4.10; 4.14.263 to before 4.15; 4.19.226 to before 4.20 Fixed in 4.5, 4.10, 4.15, 4.20 Patch available CNA
- Linux VendorLinux Affected 5.4.174 to before 5.4.180; 5.10.94 to before 5.10.101; 5.15.17 to before 5.15.24; 5.16.3 to before 5.16.10 Fixed in 5.4.180, 5.10.101, 5.15.24, 5.16.10 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.4.300 to before 4.5; 4.9.298 to before 4.10; 4.14.263 to before 4.15; 4.19.226 to before 4.20; 5.4.174 to before 5.4.180; 5.10.94 to before 5.10.101; 5.15.17 to before 5.15.24; 5.16.3 to before 5.16.10 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:* | 5.17 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:* | 5.17 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.17:rc3:*:*:*:*:*:* | 5.17 rc3 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.4.300 to before 4.5; 4.9.298 to before 4.10; 4.14.263 to before 4.15; 4.19.226 to before 4.20; 5.4.174 to before 5.4.180; 5.10.94 to before 5.10.101; 5.15.17 to before 5.15.24; 5.16.3 to before 5.16.10 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:* Versions 5.17 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:* Versions 5.17 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.17:rc3:*:*:*:*:*:* Versions 5.17 rc3 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.5, 4.10, 4.15, 4.20
- Fix · CNA Linux (Linux) Fixed in 5.4.180, 5.10.101, 5.15.24, 5.16.10
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2022-48806
- 2026-10-03 Alias added: GHSA-xpjw-95g4-7q57
References
Patch 5
- https://git.kernel.org/stable/c/3937c35493ee2847aaefcfa5460e94b7443eef49
- https://git.kernel.org/stable/c/a37960df7eac3cc8094bd1ab84864e9e32c91345
- https://git.kernel.org/stable/c/9a5f471ae380f9fcb9756d453c12ca1f8595a93c
- https://git.kernel.org/stable/c/9443ddeb3754e9e382a396b50adc1961301713ce
- https://git.kernel.org/stable/c/c0689e46be23160d925dca95dfc411f1a0462708
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- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2022-48806 · CVE Program
- CVE-2022-48806 · NVD
- FIRST EPSS
- GHSA-xpjw-95g4-7q57 · GitHub Advisory Database · CC BY 4.0
- CVE-2022-48806 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences