CVE-2022-49048Public exploit

System crash via unchecked IPv6 interface state

Published Feb 26, 2025 · Updated Aug 5, 2026

NULL pointer dereference in Linux kernel 5.14 and affected stable branches allows local users to crash the system during IPv6 forwarding. In ip6_forward(), the policy check dereferences idev->cnf.disable_policy without first confirming that the input interface has an associated inet6_dev. The published assessment requires local low-privilege access; a successful trigger causes a kernel panic and service interruption.

CVSS severity5.5
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux kernel 5.14 and affected stable branches allows local users to crash the system during IPv6 forwarding. In ip6_forward(), the policy check dereferences idev->cnf.disable_policy without first confirming that the input interface has an associated inet6_dev. The published assessment requires local low-privilege access; a successful trigger causes a kernel panic and service interruption.

The record

CVE
CVE-2022-49048
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=350e10d217337480158b604bbf6601c50ed161c6
  2. Affected versionversion=4.19.199 <4.19.239
  3. Affected versionversion=5.10.54 <5.10.112
  4. Affected versionversion=5.13.6 <5.14
  5. Affected versionversion=5.14
  6. Affected versionversion=5.4.136 <5.4.190
  7. Affected versionversion=79ec7b5b2f4fe38e5c7459ed0bdff4ef3386ab63 <a263712ba8c9ded25dd9d2d5ced11bcea5b33a3e
  8. Affected versionversion=7f4848229e91d508102b30396b8a1b710ac23637 <ab2f5afb7af5c68389e8c7dd29e0a98fbeaaa435
  9. Affected versionversion=bff0854e2f804f68d3e93d19e4580dbd69777e1d <74b68f5249f16c5f7f675d0f604fa6ae20e3a151
  10. Affected versionversion=ccd27f05ae7b8ebc40af5b004e94517a919aa862 <adee01bbf6cb5b3e4ed08be8ff866aac90f13836
  11. Affected versionversion=ccd27f05ae7b8ebc40af5b004e94517a919aa862 <e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0
  12. Affected versionversion=ccd27f05ae7b8ebc40af5b004e94517a919aa862 <e69fb3de87a8923e5931a272a38fa3cceb01da44

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=350e10d217337480158b604bbf6601c50ed161c6; version=4.19.199 <4.19.239; version=5.10.54 <5.10.112; version=5.13.6 <5.14; version=5.14; version=5.4.136 <5.4.190; version=79ec7b5b2f4fe38e5c7459ed0bdff4ef3386ab63 <a263712ba8c9ded25dd9d2d5ced11bcea5b33a3e; version=7f4848229e91d508102b30396b8a1b710ac23637 <ab2f5afb7af5c68389e8c7dd29e0a98fbeaaa435; version=bff0854e2f804f68d3e93d19e4580dbd69777e1d <74b68f5249f16c5f7f675d0f604fa6ae20e3a151; version=ccd27f05ae7b8ebc40af5b004e94517a919aa862 <adee01bbf6cb5b3e4ed08be8ff866aac90f13836; version=ccd27f05ae7b8ebc40af5b004e94517a919aa862 <e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0; version=ccd27f05ae7b8ebc40af5b004e94517a919aa862 <e69fb3de87a8923e5931a272a38fa3cceb01da44

Published CVSS scores

5.5NIST NVDCVSS: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 exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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