CVE-2022-48779

Kernel memory corruption via stale PVID pointer

Published Jul 16, 2024 · Updated Aug 5, 2026

Use-after-free in the Ocelot Ethernet switch driver in Linux 5.16 allows local users to crash the kernel through VLAN deletion. ocelot_vlan_member_del() frees the port's ocelot_bridge_vlan object before ocelot_vlan_del() reads its vid through pvid_vlan. Reaching the defect requires local VLAN-configuration access on a system using the affected driver; a resulting kernel fault interrupts the system.

CVSS severity7.8
High
EPSS probability0.22%
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 Ocelot Ethernet switch driver in Linux 5.16 allows local users to crash the kernel through VLAN deletion. ocelot_vlan_member_del() frees the port's ocelot_bridge_vlan object before ocelot_vlan_del() reads its vid through pvid_vlan. Reaching the defect requires local VLAN-configuration access on a system using the affected driver; a resulting kernel fault interrupts the system.

The record

CVE
CVE-2022-48779
Published
Jul 16, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 2024CVE 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

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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=5.16
  2. Affected versionversion=d4004422f6f9fa8e55c04482008c1c9f9edd2d19 <c98bed60cdd7f22237ae256cc9c1c3087206b8a2
  3. Affected versionversion=d4004422f6f9fa8e55c04482008c1c9f9edd2d19 <ef57640575406f57f5b3393cf57f457b0ace837e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=d4004422f6f9fa8e55c04482008c1c9f9edd2d19 <c98bed60cdd7f22237ae256cc9c1c3087206b8a2; version=d4004422f6f9fa8e55c04482008c1c9f9edd2d19 <ef57640575406f57f5b3393cf57f457b0ace837e

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.1SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-416Use After Free

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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