CVE-2026-99124
kernel: kernel: Information disclosure via out-of-bounds read in s390 PCI error reporting
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 28, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's s390 PCI subsystem. A local user can trigger an out-of-bounds read and potential information disclosure by submitting an error report with a claimed length greater than the actual payload provided. This flaw causes uninitialized kernel memory past the allocated buffer to leak into the Service Call Logical Processor (SCLP) report.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.1CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H
CWE-125 · Out-of-bounds Read