CVE-2026-68342

Kernel crash via unrelated peer reference drop

Published Aug 10, 2026 · Updated Aug 10, 2026

Use-after-free in the Linux ovpn module allows local users to crash the kernel during UDP P2P peer replacement. During old-socket destruction, ovpn_peer_release_p2p() drops the replacement peer's reference despite a socket mismatch, freeing it while ovpn->peer still points to it. Exploitation requires local low-privilege access and ovpn UDP P2P mode; successful triggering interrupts the host by crashing its kernel.

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

Use-after-free in the Linux ovpn module allows local users to crash the kernel during UDP P2P peer replacement. During old-socket destruction, ovpn_peer_release_p2p() drops the replacement peer's reference despite a socket mismatch, freeing it while ovpn->peer still points to it. Exploitation requires local low-privilege access and ovpn UDP P2P mode; successful triggering interrupts the host by crashing its kernel.

The record

CVE
CVE-2026-68342
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-825, T1499
Attack vector
local
Privileges
authenticated

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

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=6.16
  2. Affected versionversion=f6226ae7a0cd47aaa9175aca6a1e19600f884cbf <016a50379d17b886d12a4efa5211a418e035fe70
  3. Affected versionversion=f6226ae7a0cd47aaa9175aca6a1e19600f884cbf <b52c5103f64ee825996ca1ab8df7283cde8c5f86
  4. Affected versionversion=f6226ae7a0cd47aaa9175aca6a1e19600f884cbf <c5bf6b39be235ef578af4d39872f0c68cda3b937

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.16; version=f6226ae7a0cd47aaa9175aca6a1e19600f884cbf <016a50379d17b886d12a4efa5211a418e035fe70; version=f6226ae7a0cd47aaa9175aca6a1e19600f884cbf <b52c5103f64ee825996ca1ab8df7283cde8c5f86; version=f6226ae7a0cd47aaa9175aca6a1e19600f884cbf <c5bf6b39be235ef578af4d39872f0c68cda3b937

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Red HatCVSS: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

CWE-825Expired Pointer Dereference
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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