CVE-2023-3106

System crash via uninitialized XFRM state walk

Published Jul 12, 2023 · Updated Nov 20, 2025

NULL pointer dereference in the Linux kernel allows local users to crash the kernel through crafted XFRM state dump requests. In net/xfrm/xfrm_user.c, an error path skips xfrm_state_walk_init, but xfrm_dump_sa_done still passes the uninitialized walk to xfrm_state_walk_done. Low-privileged local access is required; the confirmed consequence is a kernel crash, while privilege escalation remains unverified.

CVSS severity6.6
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel allows local users to crash the kernel through crafted XFRM state dump requests. In net/xfrm/xfrm_user.c, an error path skips xfrm_state_walk_init, but xfrm_dump_sa_done still passes the uninitialized walk to xfrm_state_walk_done. Low-privileged local access is required; the confirmed consequence is a kernel crash, while privilege escalation remains unverified.

The record

CVE
CVE-2023-3106
Published
Jul 12, 2023
Updated
Nov 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.6Red Hat, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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