CVE-2023-54114

Local denial of service via incorrect MAC offset

Published Dec 24, 2025 · Updated Dec 24, 2025

Denial of service in the Linux kernel NSH GSO path allows local users to trigger a kernel panic through crafted packet transmission. The nsh_gso_segment() error path derives mac_header from a network_header that an inner GSO handler can reset, placing mac_header beyond skb headroom before skb_push(). Low-privilege local access and an inner-layer GSO failure are required; successful exploitation crashes the kernel and interrupts the host.

CVSS severity6.8
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel NSH GSO path allows local users to trigger a kernel panic through crafted packet transmission. The nsh_gso_segment() error path derives mac_header from a network_header that an inner GSO handler can reset, placing mac_header beyond skb headroom before skb_push(). Low-privilege local access and an inner-layer GSO failure are required; successful exploitation crashes the kernel and interrupts the host.

The record

CVE
CVE-2023-54114
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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=4.14
  2. Affected versionversion=c411ed854584a71b0e86ac3019b60e4789d88086 <02b20e0bc0c2628539e9e518dc342787c3332de2
  3. Affected versionversion=c411ed854584a71b0e86ac3019b60e4789d88086 <2f88c8d38ecf5ed0273f99a067246899ba499eb2
  4. Affected versionversion=c411ed854584a71b0e86ac3019b60e4789d88086 <435855b0831b351cb72cb38369ee33122ce9574c
  5. Affected versionversion=c411ed854584a71b0e86ac3019b60e4789d88086 <6fbedf987b6b8ed54a50e2205d998eb2c8be72f9
  6. Affected versionversion=c411ed854584a71b0e86ac3019b60e4789d88086 <c83b49383b595be50647f0c764a48c78b5f3c4f8
  7. Affected versionversion=c411ed854584a71b0e86ac3019b60e4789d88086 <cb38e62922aa3991793344b5a5870e7291c74a44
  8. Affected versionversion=c411ed854584a71b0e86ac3019b60e4789d88086 <cdd8160dcda1fed2028a5f96575a84afc23aff7d
  9. Affected versionversion=c411ed854584a71b0e86ac3019b60e4789d88086 <d2309e0cb27b6871b273fbc1725e93be62570d86

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=c411ed854584a71b0e86ac3019b60e4789d88086 <02b20e0bc0c2628539e9e518dc342787c3332de2; version=c411ed854584a71b0e86ac3019b60e4789d88086 <2f88c8d38ecf5ed0273f99a067246899ba499eb2; version=c411ed854584a71b0e86ac3019b60e4789d88086 <435855b0831b351cb72cb38369ee33122ce9574c; version=c411ed854584a71b0e86ac3019b60e4789d88086 <6fbedf987b6b8ed54a50e2205d998eb2c8be72f9; version=c411ed854584a71b0e86ac3019b60e4789d88086 <c83b49383b595be50647f0c764a48c78b5f3c4f8; version=c411ed854584a71b0e86ac3019b60e4789d88086 <cb38e62922aa3991793344b5a5870e7291c74a44; version=c411ed854584a71b0e86ac3019b60e4789d88086 <cdd8160dcda1fed2028a5f96575a84afc23aff7d; version=c411ed854584a71b0e86ac3019b60e4789d88086 <d2309e0cb27b6871b273fbc1725e93be62570d86

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5SUSECVSS: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.

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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

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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