CVE-2026-68420Public exploit

System crash via optional outbound IPTFS template

Published Aug 10, 2026 · Updated Aug 10, 2026

A stack out-of-bounds read in affected Linux kernel releases allows local users to crash the system through an outbound XFRM policy. xfrm_tmpl_resolve_one accepts an optional IPTFS template that should be rejected like tunnel mode, allowing xfrm_state_find to reach an out-of-bounds address hash read. Exploitation requires permission to configure local XFRM policies; inbound and forwarding policies do not reach the affected path.

CVSS severityUnavailable
Unscored
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack out-of-bounds read in affected Linux kernel releases allows local users to crash the system through an outbound XFRM policy. xfrm_tmpl_resolve_one accepts an optional IPTFS template that should be rejected like tunnel mode, allowing xfrm_state_find to reach an out-of-bounds address hash read. Exploitation requires permission to configure local XFRM policies; inbound and forwarding policies do not reach the affected path.

The record

CVE
CVE-2026-68420
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=6.14
  2. Affected versionversion=d1716d5a44c37e5743bf6ea4e5cdbdab37727f27 <9333f4b6f44858fc98eb12bf26b8d2959eb975d5
  3. Affected versionversion=d1716d5a44c37e5743bf6ea4e5cdbdab37727f27 <d7fc6f351c478586980a521d63b0214d9c055e78
  4. Affected versionversion=d1716d5a44c37e5743bf6ea4e5cdbdab37727f27 <ea528f18231ec0f33317be57f8866913b19aba6e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=d1716d5a44c37e5743bf6ea4e5cdbdab37727f27 <9333f4b6f44858fc98eb12bf26b8d2959eb975d5; version=d1716d5a44c37e5743bf6ea4e5cdbdab37727f27 <d7fc6f351c478586980a521d63b0214d9c055e78; version=d1716d5a44c37e5743bf6ea4e5cdbdab37727f27 <ea528f18231ec0f33317be57f8866913b19aba6e

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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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