CVE-2026-46306Network attack vector

Remote crash via misaligned PPPoE PFC payload

Published Jun 8, 2026 · Updated Jun 8, 2026

Denial of service in the Linux Kernel flow dissector allows remote attackers to crash affected systems with a crafted PPPoE PFC frame. __skb_flow_dissect treats a compressed one-byte PPP protocol field as uncompressed, shifting the network header and performing an unaligned access. The crash requires an architecture that faults on unaligned access and an Ethernet interface with RPS enabled; no active PPPoE session is required.

CVSS severity7.5
High
EPSS probability0.44%
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 flow dissector allows remote attackers to crash affected systems with a crafted PPPoE PFC frame. __skb_flow_dissect treats a compressed one-byte PPP protocol field as uncompressed, shifting the network header and performing an unaligned access. The crash requires an architecture that faults on unaligned access and an Ethernet interface with RPS enabled; no active PPPoE session is required.

The record

CVE
CVE-2026-46306
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 2026Record 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=10f665b52a75df6eb26ddebbbc072ee264183731 <e7c811ca372d53c2be7d01a1614e71fae1054836
  2. Affected versionversion=46126db9c86110e5fc1e369b9bb89735ddefdae4 <0d00b9015069712944934bab09eaa6c542143049
  3. Affected versionversion=46126db9c86110e5fc1e369b9bb89735ddefdae4 <18ae9eacfc95cc715c0606b2c86e8aa8a86cf3e3
  4. Affected versionversion=46126db9c86110e5fc1e369b9bb89735ddefdae4 <6044392d9cace3a3672b02c8bc7d38b502e51734
  5. Affected versionversion=46126db9c86110e5fc1e369b9bb89735ddefdae4 <7c93f353eab4ea911e394630f07d72e040a729d8
  6. Affected versionversion=46126db9c86110e5fc1e369b9bb89735ddefdae4 <d6c19b31a3c1d519fabdcf0aa239e6b6109b9473
  7. Affected versionversion=46126db9c86110e5fc1e369b9bb89735ddefdae4 <db104b0d8a7856397c0469d83a4289adf7c54863
  8. Affected versionversion=6.0
  9. Affected versionversion=d7e541e86122d21f71eb71c5dfa7fb1eb6623fe8 <abc5bc84e0f2edc7ea2d437afa6ef3fe1fc43200

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=10f665b52a75df6eb26ddebbbc072ee264183731 <e7c811ca372d53c2be7d01a1614e71fae1054836; version=46126db9c86110e5fc1e369b9bb89735ddefdae4 <0d00b9015069712944934bab09eaa6c542143049; version=46126db9c86110e5fc1e369b9bb89735ddefdae4 <18ae9eacfc95cc715c0606b2c86e8aa8a86cf3e3; version=46126db9c86110e5fc1e369b9bb89735ddefdae4 <6044392d9cace3a3672b02c8bc7d38b502e51734; version=46126db9c86110e5fc1e369b9bb89735ddefdae4 <7c93f353eab4ea911e394630f07d72e040a729d8; version=46126db9c86110e5fc1e369b9bb89735ddefdae4 <d6c19b31a3c1d519fabdcf0aa239e6b6109b9473; version=46126db9c86110e5fc1e369b9bb89735ddefdae4 <db104b0d8a7856397c0469d83a4289adf7c54863; version=6.0; version=d7e541e86122d21f71eb71c5dfa7fb1eb6623fe8 <abc5bc84e0f2edc7ea2d437afa6ef3fe1fc43200

Published CVSS scores

7.5Linux Kernel CNACVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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