CVE-2024-44948
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2024
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
x86/mtrr: Check if fixed MTRRs exist before saving them
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2b1f6278d77c1f2f669346fc2bb48012b5e9495a | affected | git | 34f36e6ee5bd7eff8b2adcd9fcaef369f752d82e | Unavailable | None listed |
| 2b1f6278d77c1f2f669346fc2bb48012b5e9495a | affected | git | 06c1de44d378ec5439db17bf476507d68589bfe9 | Unavailable | None listed |
| 2b1f6278d77c1f2f669346fc2bb48012b5e9495a | affected | git | 450b6b22acdaac67a18eaf5ed498421ffcf10051 | Unavailable | None listed |
| 2b1f6278d77c1f2f669346fc2bb48012b5e9495a | affected | git | ca7d00c5656d1791e28369919e3e10febe9c3b16 | Unavailable | None listed |
| 2b1f6278d77c1f2f669346fc2bb48012b5e9495a | affected | git | 8aa79dfb216b865e96ff890bc4ea71650f9bc8d7 | Unavailable | None listed |
| 2b1f6278d77c1f2f669346fc2bb48012b5e9495a | affected | git | 8a90d3fc7c24608548d3a750671f9dac21d1a462 | Unavailable | None listed |
| 2b1f6278d77c1f2f669346fc2bb48012b5e9495a | affected | git | 388f1c954019f253a8383f7eb733f38d541e10b6 | Unavailable | None listed |
| 2b1f6278d77c1f2f669346fc2bb48012b5e9495a | affected | git | 919f18f961c03d6694aa726c514184f2311a4614 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.22 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.22 | Unavailable | None listed |
| 4.19.320 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.282 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.224 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.165 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.105 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.46 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.10.5 | unaffected | semver | Unavailable | 6.10.* | None listed |
| 6.11 | unaffected | original_commit_for_fix | Unavailable | * | None listed |