SB2026052890 - Out-of-bounds read in Linux kernel misc ibmasm driver
Published: May 28, 2026
Security Bulletin ID
SB2026052890
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) Out-of-bounds read (CVE-ID: CVE-2026-45994)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/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 out-of-bounds read in command_file_write() when processing a crafted dot command buffer. A local user can supply header fields that cause the declared command size to exceed the allocated buffer to disclose sensitive information.
Kernel heap memory may be leaked to the service processor through an out-of-bounds memcpy_toio() operation.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0eb09f737428e482a32a2e31e5e223f2b35a71d3
- https://git.kernel.org/stable/c/a672682d39dd34e2b5ba4feb436723bed65125ff
- https://git.kernel.org/stable/c/aefc1a97da17d8309974690c8a03e439a91ebb1c
- https://git.kernel.org/stable/c/d0fb4d1dc43f8d5179917a2daaa82680993d4cdf
- https://git.kernel.org/stable/c/ee5737891464030a189837467df3b81a273718ad