micropython runtime.c mp_import_all memory corruption
Published Feb 6, 2026
4.8
MEDIUMCVSS 4.0
EPSS 0.21%
Description
A flaw has been found in micropython up to 1.27.0. This vulnerability affects the function mp_import_all of the file py/runtime.c. This manipulation causes memory corruption. The attack needs to be launched locally. The exploit has been published and may be used. Patch name: 570744d06c5ba9dba59b4c3f432ca4f0abd396b6. It is suggested to install a patch to address this issue.
Affected products
-
- Version 1.0StatusaffectedConstraints-
- Version 1.1StatusaffectedConstraints-
- Version 1.10StatusaffectedConstraints-
- Version 1.11StatusaffectedConstraints-
- Version 1.12StatusaffectedConstraints-
- Version 1.13StatusaffectedConstraints-
- Version 1.14StatusaffectedConstraints-
- Version 1.15StatusaffectedConstraints-
- Version 1.16StatusaffectedConstraints-
- Version 1.17StatusaffectedConstraints-
- Version 1.18StatusaffectedConstraints-
- Version 1.19StatusaffectedConstraints-
- Version 1.2StatusaffectedConstraints-
- Version 1.20StatusaffectedConstraints-
- Version 1.21StatusaffectedConstraints-
- Version 1.22StatusaffectedConstraints-
- Version 1.23StatusaffectedConstraints-
- Version 1.24StatusaffectedConstraints-
- Version 1.25StatusaffectedConstraints-
- Version 1.26StatusaffectedConstraints-
- Version 1.27.0StatusaffectedConstraints-
- Version 1.3StatusaffectedConstraints-
- Version 1.4StatusaffectedConstraints-
- Version 1.5StatusaffectedConstraints-
- Version 1.6StatusaffectedConstraints-
- Version 1.7StatusaffectedConstraints-
- Version 1.8StatusaffectedConstraints-
- Version 1.9StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Micropython | Micropython | n/a |
|
- ≤ 1.27.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
1 other source (NVD) ▾
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1 other source (CVE.org) ▾
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C
1 other source (NVD) ▾
AV:L/AC:L/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Feb 12, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Feb–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.21% (0.00215) | 10.81th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.20% (0.00203) | 10.22th | v5 (v2026.06.15) |
| Feb 6, 2026 | 0.01% (0.00015) | 2.54th | v4 (v2025.03.14) |
References (8)
- https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6 patch
- https://github.com/micropython/micropython/ product
- https://github.com/micropython/micropython/issues/18639 issue-trackingExploitIssue Tracking
- https://github.com/micropython/micropython/issues/18639#issue-3780651410 exploitissue-trackingIssue Tracking
- https://github.com/micropython/micropython/pull/18671 issue-trackingExploitIssue Tracking
- https://vuldb.com/?ctiid.344546 signaturepermissions-requiredPermissions RequiredVDB Entry
- https://vuldb.com/?id.344546 vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry
- https://vuldb.com/?submit.743396 third-party-advisoryExploitThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6 | patch | |
| https://github.com/micropython/micropython/ | product | |
| https://github.com/micropython/micropython/issues/18639 | issue-trackingExploitIssue Tracking | |
| https://github.com/micropython/micropython/issues/18639#issue-3780651410 | exploitissue-trackingIssue Tracking | |
| https://github.com/micropython/micropython/pull/18671 | issue-trackingExploitIssue Tracking | |
| https://vuldb.com/?ctiid.344546 | signaturepermissions-requiredPermissions RequiredVDB Entry | |
| https://vuldb.com/?id.344546 | vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry | |
| https://vuldb.com/?submit.743396 | third-party-advisoryExploitThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.