CVE-2023-54273

Service interruption via mismatched netdev tracker release

Published Dec 30, 2025 · Updated Dec 30, 2025

A resource leak in the Linux kernel XFRM subsystem 6.2 through 6.3.3 allows local users to interrupt service through policy offload. The xfrm_dev_policy_add function initializes xdo->dev_tracker, but its invalid-direction path calls dev_put instead of tracker-aware netdev_put. The impact is availability only; reaching this path requires local low-privileged access and an IPsec-offload-capable network device.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A resource leak in the Linux kernel XFRM subsystem 6.2 through 6.3.3 allows local users to interrupt service through policy offload. The xfrm_dev_policy_add function initializes xdo->dev_tracker, but its invalid-direction path calls dev_put instead of tracker-aware netdev_put. The impact is availability only; reaching this path requires local low-privileged access and an IPsec-offload-capable network device.

The record

CVE
CVE-2023-54273
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.2
  2. Affected versionversion=919e43fad5163a8ceb39826ecdee897a9f799351 <7d16c515059b3746f2d6a24a74c3ba786a68c2a1
  3. Affected versionversion=919e43fad5163a8ceb39826ecdee897a9f799351 <ec8f32ad9a65a8cbb465b69e154aaec9d2fe45c4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.2; version=919e43fad5163a8ceb39826ecdee897a9f799351 <7d16c515059b3746f2d6a24a74c3ba786a68c2a1; version=919e43fad5163a8ceb39826ecdee897a9f799351 <ec8f32ad9a65a8cbb465b69e154aaec9d2fe45c4

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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