Huawei EulerOS: CVE-2024-44948: kernel security update

Huawei EulerOS: CVE-2024-44948: kernel security update

Severity

4

CVSS

(AV:L/AC:M/Au:N/C:P/I:P/A:P)

Published

09/04/2024

Created

12/13/2024

Added

12/12/2024

Modified

12/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved: x86/mtrr: Check if fixed MTRRs exist before saving them MTRRs have an obsolete fixed variant for fine grained caching control of the 640K-1MB region that uses separate MSRs. This fixed variant has a separate capability bit in the MTRR capability MSR. So far all x86 CPUs which support MTRR have this separate bit set, so it went unnoticed that mtrr_save_state() does not check the capability bit before accessing the fixed MTRR MSRs. Though on a CPU that does not support the fixed MTRR capability this results in a #GP.The #GP itself is harmless because the RDMSR fault is handled gracefully, but results in a WARN_ON(). Add the missing capability check to prevent this.

Solution(s)

• huawei-euleros-2_0_sp12-upgrade-bpftool
• huawei-euleros-2_0_sp12-upgrade-kernel
• huawei-euleros-2_0_sp12-upgrade-kernel-abi-stablelists
• huawei-euleros-2_0_sp12-upgrade-kernel-tools
• huawei-euleros-2_0_sp12-upgrade-kernel-tools-libs
• huawei-euleros-2_0_sp12-upgrade-python3-perf

References

• https://attackerkb.com/topics/cve-2024-44948
• CVE - 2024-44948
• EulerOS-SA-2024-2953