CVE-2024-44948 (GCVE-0-2024-44948)

Vulnerability from cvelistv5 – Published: 2024-09-04 18:35 – Updated: 2026-10-15 00:49
VLAI
Title
x86/mtrr: Check if fixed MTRRs exist before saving them
Summary
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.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:40 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6639 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2b1f6278d77c1f2f669346fc2bb48012b5e9495a , < 34f36e6ee5bd7eff8b2adcd9fcaef369f752d82e (git)
Affected: 2b1f6278d77c1f2f669346fc2bb48012b5e9495a , < 06c1de44d378ec5439db17bf476507d68589bfe9 (git)
Affected: 2b1f6278d77c1f2f669346fc2bb48012b5e9495a , < 450b6b22acdaac67a18eaf5ed498421ffcf10051 (git)
Affected: 2b1f6278d77c1f2f669346fc2bb48012b5e9495a , < ca7d00c5656d1791e28369919e3e10febe9c3b16 (git)
Affected: 2b1f6278d77c1f2f669346fc2bb48012b5e9495a , < 8aa79dfb216b865e96ff890bc4ea71650f9bc8d7 (git)
Affected: 2b1f6278d77c1f2f669346fc2bb48012b5e9495a , < 8a90d3fc7c24608548d3a750671f9dac21d1a462 (git)
Affected: 2b1f6278d77c1f2f669346fc2bb48012b5e9495a , < 388f1c954019f253a8383f7eb733f38d541e10b6 (git)
Affected: 2b1f6278d77c1f2f669346fc2bb48012b5e9495a , < 919f18f961c03d6694aa726c514184f2311a4614 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.22
Unaffected: 0 , < 2.6.22 (semver)
Unaffected: 4.19.320 , ≤ 4.19.* (semver)
Unaffected: 5.4.282 , ≤ 5.4.* (semver)
Unaffected: 5.10.224 , ≤ 5.10.* (semver)
Unaffected: 5.15.165 , ≤ 5.15.* (semver)
Unaffected: 6.1.105 , ≤ 6.1.* (semver)
Unaffected: 6.6.46 , ≤ 6.6.* (semver)
Unaffected: 6.10.5 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < V1.1.1 (custom)
guessed Create a notification for this product.
Show details on NVD website
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}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Vulnerability timeline

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