SB20260507130 - Use of Uninitialized Variable in Linux kernel char ipmi driver
Published: May 7, 2026
Security Bulletin ID
SB20260507130
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use of Uninitialized Variable (CVE-ID: CVE-2026-43221)
CWE-ID: CWE-457 - Use of Uninitialized Variable
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to use of uninitialized memory in the ipmi ipmb event handler when handling i2c read operations. A local user can trigger an i2c read to disclose sensitive information.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/102712417bb6aa9a00d852bc59cb0a276db486c4
- https://git.kernel.org/stable/c/2dfbc8c17dd161885336e77e71c336cd62cf6748
- https://git.kernel.org/stable/c/56d5c0557e53c4d8d92a619fa83eaae178165e07
- https://git.kernel.org/stable/c/905554ebd76aeee370bfd5136ea11e0b9d75c6f1
- https://git.kernel.org/stable/c/9f235ccecd03c436cb1683eac16b12f119e54aa9
- https://git.kernel.org/stable/c/f726b3a57e00bb6249c67714c11ae8b4b31719a1