spectre-meltdown-checker v26.36.0913490
Reptar, Downfall, Zenbleed, ZombieLoad, RIDL, Fallout, Foreshadow, Spectre, Meltdown vulnerability/mitigation checker for Linux & BSD
Spectre & Meltdown Checker
A self-contained shell script to assess your system's resilience against the several transient execution CVEs that were published since early 2018, and give you guidance as to how to mitigate them.
CVE list
| CVE | Name | Aliases |
|---|---|---|
| CVE-2017-5753 | Bounds Check Bypass | Spectre V1 |
| CVE-2017-5715 | Branch Target Injection | Spectre V2 |
| CVE-2017-5754 | Rogue Data Cache Load | Meltdown |
| CVE-2018-3640 | Rogue System Register Read | Variant 3a |
| CVE-2018-3639 | Speculative Store Bypass | Variant 4, SSB |
| CVE-2018-3615 | L1 Terminal Fault | Foreshadow (SGX) |
| CVE-2018-3620 | L1 Terminal Fault | Foreshadow-NG (OS/SMM) |
| CVE-2018-3646 | L1 Terminal Fault | Foreshadow-NG (VMM) |
| CVE-2018-12126 | Microarchitectural Store Buffer Data Sampling | MSBDS, Fallout |
| CVE-2018-12127 | Microarchitectural Load Port Data Sampling | MLPDS, RIDL |
| CVE-2018-12130 | Microarchitectural Fill Buffer Data Sampling | MFBDS, ZombieLoad |
| CVE-2018-12207 | Machine Check Exception on Page Size Changes | iTLB Multihit, No eXcuses |
| CVE-2019-11091 | Microarchitectural Data Sampling Uncacheable Memory | MDSUM, RIDL |
| CVE-2019-11135 | TSX Asynchronous Abort | TAA, ZombieLoad V2 |
| CVE-2020-0543 | Special Register Buffer Data Sampling | SRBDS, CROSSTalk |
| CVE-2022-21123 | Shared Buffers Data Read | SBDR, MMIO Stale Data |
| CVE-2022-21125 | Shared Buffers Data Sampling | SBDS, MMIO Stale Data |
| CVE-2022-21166 | Device Register Partial Write | DRPW, MMIO Stale Data |
| CVE-2022-29900 | Arbitrary Speculative Code Execution with Return Instructions | Retbleed (AMD) |
| CVE-2022-29901 | Arbitrary Speculative Code Execution with Return Instructions | Retbleed (Intel), RSBA |
| CVE-2022-40982 | Gather Data Sampling | Downfall, GDS |
| CVE-2023-20569 | Return Address Security | Inception, SRSO |
| CVE-2023-20588 | AMD Division by Zero Speculative Data Leak | DIV0 |
| CVE-2023-20593 | Cross-Process Information Leak | Zenbleed |
| CVE-2023-23583 | Redundant Prefix Issue | Reptar |
| CVE-2023-28746 | Register File Data Sampling | RFDS |
| CVE-2024-28956 | Indirect Target Selection | ITS |
| CVE-2024-36350 | Transient Scheduler Attack, Store Queue | TSA-SQ |
| CVE-2024-36357 | Transient Scheduler Attack, L1 | TSA-L1 |
| CVE-2025-40300 | VM-Exit Stale Branch Prediction | VMScape |
| CVE-2024-45332 | Branch Privilege Injection | BPI |
| CVE-2025-54505 | AMD Zen1 Floating-Point Divider Stale Data Leak | FPDSS |
The following entries are ARM64 silicon errata that the kernel actively works around. They have no assigned CVE; they are tracked only by ARM's erratum numbers. Select them with --errata <number> or the associated --variant mnemonic.
| ID | Name | Affected cores |
|---|---|---|
| CVE-0001-0001 | Speculative AT TLB corruption (errata 1165522, 1319367, 1319537, 1530923) | Cortex-A55/A57/A72/A76 |
| CVE-0001-0002 | Speculative unprivileged load (errata 2966298, 3117295) | Cortex-A510/A520 |
| CVE-0001-0003 | MSR SSBS not self-synchronizing (erratum 3194386 + siblings) | Cortex-A76/A77/A78/A78C/A710/A715/A720/A720AE/A725, X1/X1C/X2/X3/X4/X925, Neoverse-N1/N2/N3/V1/V2/V3/V3AE |
Am I at risk?
Depending on your situation, the table below answers whether an attacker in a given position can extract data from a given target. The "Userland → Kernel" column also applies within a VM (VM userland vs. VM kernel), since the same CPU mechanisms are at play regardless of virtualization.