CVE-2023-42753

Medium

Elevated severity or exploit probability.

CVSS base

7.0 HIGH

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

EPSS — probability of exploitation (30 days)

0.5%

42.5th percentile

CISA KEV

Not listed

Weakness / dates

CWE-787

Published 2023-09-25 · modified 2026-08-06

CVSS breakdown

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

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

Timeline

2023-09-25 — Published (NVD)
2026-08-06 — Last modified (NVD)

Description

An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.

Affected

debian linux redhat

References

Official: NVD · CVE.org