CVE-2023-6932

Use-after-free in Linux kernel's ipv4: igmp component

HIGH
7
CVSS Score
Published: December 19, 2023 at 02:09 PM UTC
Updated: October 14, 2026 at 11:17 PM UTC
6 products affected across 3 vendorsLinux KernelDebian LinuxSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP Firmware

Using Kernel by Linux?

Get instant alerts when new vulnerabilities affect Kernel - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

A use-after-free vulnerability in the Linux kernel's ipv4: igmp component can be exploited to achieve local privilege escalation. A race condition can be exploited to cause a timer be mistakenly registered on a RCU read locked object which is freed by another thread. We recommend upgrading past commit e2b706c691905fe78468c361aaabc719d0a496f1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.14.3324.15 ≤ v < 4.19.3014.20 ≤ v < 5.4.2635.11 ≤ v < 5.15.1425.16 ≤ v < 6.1.665.5 ≤ v < 5.10.2036.2 ≤ v < 6.6.52.6.12
Affected range stops below 6.7, so it looks safe — our inference, not a vendor statement
V3.1.0 ≤ v < V3.1.53.1.0
Affected range stops below V3.1.5, so it looks safe — our inference, not a vendor statement
V3.1.0 ≤ v < V3.1.53.1.0
Affected range stops below V3.1.5, so it looks safe — our inference, not a vendor statement
V3.1.0 ≤ v < V3.1.53.1.0
Affected range stops below V3.1.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card