CVE-2026-45994: ibmasm: fix OOB reads in command_file_write due to missing size checks
Published May 27, 2026
·Updated
ibmasm: fix OOB reads in commandfilewrite due to missing size checks
Affected Software
14 affected componentsFixes available
Linux kernel ibmasm
Linux Linux kernel>=2.6.12.1<5.10.258
Linux Linux kernel>=5.11<5.15.209
Linux Linux kernel>=5.16<6.1.175
Linux Linux kernel>=6.2<6.6.140
Linux Linux kernel>=6.7<6.12.86
Linux Linux kernel>=6.13<6.18.27
Linux Linux kernel>=6.19<7.0.4
Linux Linux kernel=2.6.12
Linux Linux kernel=2.6.12-rc2
Linux Linux kernel=2.6.12-rc3
Linux Linux kernel=2.6.12-rc4
Linux Linux kernel=2.6.12-rc5
Microsoft azl3 kernel 6.6.139.1-1<6.6.141.1-1
6.6.141.1-1
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.141.1-1 - Upgrade
Upgrade
linux kernelto a version that resolves this vulnerability.Patch ibmasm: fix OOB reads in command_file_write due to missing size checks - Configuration
Modify command_file_write() to validate the incoming write size against the total size declared by the dot_command_header fields, and reject commands where the buffer is smaller than (sizeof(header) + command_size + data_size) to prevent OOB reads in get_dot_command_timeout().
Linux kernel (dot command protocol, command_file_write()) Reject writes where provided buffer size < declared total size (sizeof(header) + command_size + data_size) = buffer_too_small_rejected
Event History
May 27, 2026
CVE Published
via MITRE·12:55 PM
Data Sourced
via MITRE·12:55 PM
Description
Data Sourced
via NVD·02:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
May 28, 2026
Data Sourced
via Microsoft·08:08 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·08:08 AM
Affected Software
Updated
via Microsoft·08:08 AM
DescriptionSeverity