CVE-2026-1998
Publication date 7 February 2026
Last updated 7 February 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| micropython | 25.10 questing |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
3.3 · Low
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-1998
- https://github.com/micropython/micropython/issues/18639
- https://github.com/micropython/micropython/pull/18671
- https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6
- https://github.com/micropython/micropython/
- https://github.com/micropython/micropython/issues/18639#issue-3780651410
- https://vuldb.com/?ctiid.344546
- https://vuldb.com/?id.344546
- https://vuldb.com/?submit.743396