i2c: s3c24xx: check the size of the SMBUS message before using it
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: s3c24xx: check the size of the SMBUS message before using it The first byte of an i2c SMBUS message is the size, and it should be verified to ensure that it is in the range of 0..I2C_SMBUS_BLOCK_MAX before processing it. This is the same logic that was added in commit a6e04f05ce0b ("i2c: tegra: check msg length in SMBUS block read") to the i2c tegra driver.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 3.10 and later | 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0.1, 7.1 | Patch available | CNA |
- Linux VendorLinux Affected 3.10 and later Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0.1, 7.1 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0.1, 7.1
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-31627
- 2026-10-03 Alias added: GHSA-q8hh-7xg8-pfvm
References
Patch 6
- https://git.kernel.org/stable/c/fa00738ab30b07db1a43b9c85fc56b8cc3b7d197
- https://git.kernel.org/stable/c/d87d5620125a03b1eadbd5df39748215d3db7ddb
- https://git.kernel.org/stable/c/377fae22a137b6b89f3f32399a58c52cf2325416
- https://git.kernel.org/stable/c/71b3c316b22c555d2769126a92b1244b15a9750d
- https://git.kernel.org/stable/c/aaaaec39ddbcd06770dca7f1adebc3b1242ebe7b
- https://git.kernel.org/stable/c/c0128c7157d639a931353ea344fb44aad6d6e17a
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Sources
- CVE-2026-31627 · CVE Program
- CVE-2026-31627 · NVD
- FIRST EPSS
- GHSA-q8hh-7xg8-pfvm · GitHub Advisory Database · CC BY 4.0
- CVE-2026-31627 · Red Hat security data · CC BY 4.0
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