CVE-2023-6507

Low

No strong exploitation signal.

CVSS base

6.1 MEDIUM

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

EPSS — probability of exploitation (30 days)

1.3%

69.7th percentile

CISA KEV

Not listed

Weakness / dates

CWE-269

Published 2023-12-08 · modified 2026-07-31

CVSS breakdown

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Attack Vector	A	Adjacent
Attack Complexity	L	Low
Privileges Required	H	High
User Interaction	N	None
Scope	U	Unchanged
Confidentiality	H	High
Integrity	H	High
Availability	N	None

Timeline

2023-12-08 — Published (NVD)
2026-07-31 — Last modified (NVD)

Description

An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. The issue was fixed in CPython 3.12.1 and does not affect other stable releases. When using the `extra_groups=` parameter with an empty list as a value (ie `extra_groups=[]`) the logic regressed to not call `setgroups(0, NULL)` before calling `exec()`, thus not dropping the original processes' groups before starting the new process. There is no issue when the parameter isn't used or when any value is used besides an empty list. This issue only impacts CPython processes run with sufficient privilege to make the `setgroups` system call (typically `root`).

Affected

python

References

Official: NVD · CVE.org