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CVE-2023-7152

MicroPython modselect.c poll_set_add_fd use after free

5.5 MediumFix available

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Attack profile

How easy it is to exploit

Attack vector
Adjacent network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
Low

Exploit likelihood

0.89%Up 0.8 points since Dec 29, 2023
90%50%10%1%

What each source reports

CVE List Score used 5.5

MicroPython modselect.c poll_set_add_fd use after free

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Record
CVE-2023-7152
CVSS 3.1
5.5 MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS 3.0
5.5 MediumCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS 2.0
5.2 AV:A/AC:L/Au:S/C:P/I:P/A:P
Weakness
CWE-416
Updated
2026-11-02
EUVDEUVD-2023-0145 5.5

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Record
EUVD-2023-0145
CVSS 3.1
5.5 MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-03
GitHub AdvisoriesGHSA-jpcc-65j8-6q37 5.5

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0...

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Record
GHSA-jpcc-65j8-6q37
CVSS 3.1
5.5 MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-416
Updated
2026-11-02
NVD 5.5

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Record
CVE-2023-7152
CVSS 3.1
5.5 MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
5.2 MediumAV:A/AC:L/Au:S/C:P/I:P/A:P
Weakness
CWE-416
Updated
2026-11-02
OSV 5.5

MicroPython modselect.c poll_set_add_fd use after free

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Record
CVE-2023-7152
CVSS 3.1
5.5 MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-416
Updated
2026-11-02
OSVPYSEC-2023-256 9.8

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Record
PYSEC-2023-256
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVPYSEC-2023-257 9.8

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Record
PYSEC-2023-257
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVPYSEC-2023-258 9.8

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Record
PYSEC-2023-258
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVPYSEC-2023-259 9.8

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Record
PYSEC-2023-259
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2023-7152 5.5

A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.

Record
UBUNTU-CVE-2023-7152
CVSS 3.1
5.5 MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
micropython-copy
PyPI
 All versions, plus listed versions
0.0.10.0.23.3.3-23.3.3.post3
 None known
micropython-io
PyPI
 All versions, plus listed versions
0.0.10.0.20.0.30.1
 None known
micropython-os
PyPI
 All versions, plus listed versions
0.2.30.2.40.30.3.10.4.1
Show 7 moreShow less
0.4.20.4.30.4.40.60.70.7.10.8
 None known
micropython-select
PyPI
 All versions, plus listed versions
0.0.10.0.30.0.40.0.50.0.6
Show 12 moreShow less
0.0.70.0.80.10.1.10.1.20.1.30.1.40.1.50.1.60.1.70.20.3
 None known
giac
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.2.3.57+dfsg1-2build11.2.3.57+dfsg1-2build21.2.3.57+dfsg1-2build3
 None known
giac
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.4.9.69+dfsg1-2build11.5.0.85+dfsg1-21.5.0.85+dfsg1-3
 None known
giac
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.6.0.41+dfsg1-11.7.0.39+dfsg2-1build11.7.0.39+dfsg2-1build2
 None known
giac
Ubuntu:24.04:LTS
 All versions, plus listed versions
1.9.0.35+dfsg2-1.11.9.0.59+dfsg2-11.9.0.69+dfsg2-11.9.0.93+dfsg2-2
 None known
giac
Ubuntu:25.10
 All versions, plus listed versions
1.9.0.93+dfsg2-3build1
 None known
giac
Ubuntu:26.10
 All versions, plus listed versions
1.9.0.93+dfsg2-3build21.9.0.93+dfsg2-4
 None known
giac
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.9.0.93+dfsg2-3build11.9.0.93+dfsg2-3build2
 None known

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-7152 is a medium vulnerability (CVSS 5.5) in Micropython, published December 29, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.89%, the 59th percentile. A source reports a fix.

References

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