CVE-2025-68725

Service interruption via malformed BPF GSO metadata

Published Dec 24, 2025 · Updated Dec 24, 2025

Improper GSO validation in the Linux kernel allows local users to interrupt service through the BPF test infrastructure. convert___NERSKB_to_skb sets gso_segs and gso_size without setting gso_type, and bpf_clone_redirect can send the malformed packet to loopback, where GSO checking raises an offload warning. Exploitation requires permission to run a BPF test program; the documented impact is limited to availability, with no confidentiality or integrity loss.

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

Improper GSO validation in the Linux kernel allows local users to interrupt service through the BPF test infrastructure. convert___NERSKB_to_skb sets gso_segs and gso_size without setting gso_type, and bpf_clone_redirect can send the malformed packet to loopback, where GSO checking raises an offload warning. Exploitation requires permission to run a BPF test program; the documented impact is limited to availability, with no confidentiality or integrity loss.

The record

CVE
CVE-2025-68725
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.6
  2. Affected versionversion=850a88cc4096fe1df407452ba2e4d28cf5b3eee9 <04a899573fb87273a656f178b5f920c505f68875
  3. Affected versionversion=850a88cc4096fe1df407452ba2e4d28cf5b3eee9 <fbea4c63b5385588cb44ab21f91e55e33c719a54

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=850a88cc4096fe1df407452ba2e4d28cf5b3eee9 <04a899573fb87273a656f178b5f920c505f68875; version=850a88cc4096fe1df407452ba2e4d28cf5b3eee9 <fbea4c63b5385588cb44ab21f91e55e33c719a54

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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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