Executive Summary

Informations
Name CVE-2024-44948 First vendor Publication 2024-09-04
Vendor Cve Last vendor Modification 2024-09-05

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-44948

Sources (Detail)

https://git.kernel.org/stable/c/06c1de44d378ec5439db17bf476507d68589bfe9
https://git.kernel.org/stable/c/34f36e6ee5bd7eff8b2adcd9fcaef369f752d82e
https://git.kernel.org/stable/c/388f1c954019f253a8383f7eb733f38d541e10b6
https://git.kernel.org/stable/c/450b6b22acdaac67a18eaf5ed498421ffcf10051
https://git.kernel.org/stable/c/8a90d3fc7c24608548d3a750671f9dac21d1a462
https://git.kernel.org/stable/c/8aa79dfb216b865e96ff890bc4ea71650f9bc8d7
https://git.kernel.org/stable/c/919f18f961c03d6694aa726c514184f2311a4614
https://git.kernel.org/stable/c/ca7d00c5656d1791e28369919e3e10febe9c3b16
Source Url

Alert History

If you want to see full details history, please login or register.
0
1
Date Informations
2024-09-05 17:27:25
  • Multiple Updates
2024-09-05 00:27:26
  • First insertion