CVE-2022-4269Public exploit

Local service hang via nested mirred forwarding

Published Dec 5, 2022 · Updated Apr 14, 2025

Deadlock in the Linux kernel TC subsystem from 4.10-rc1 through 6.2 allows local users to hang CPUs via mirred packet redirection. In tcf_mirred_forward(), nested egress-to-ingress delivery calls netif_receive_skb() inline instead of queueing the packet on the backlog, allowing retransmission paths to reacquire locks in reverse order. Reachability requires local unprivileged access, a TC mirred egress-to-ingress configuration, and TCP or SCTP retransmission; the bounded result is a CPU soft lockup and service hang.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deadlock in the Linux kernel TC subsystem from 4.10-rc1 through 6.2 allows local users to hang CPUs via mirred packet redirection. In tcf_mirred_forward(), nested egress-to-ingress delivery calls netif_receive_skb() inline instead of queueing the packet on the backlog, allowing retransmission paths to reacquire locks in reverse order. Reachability requires local unprivileged access, a TC mirred egress-to-ingress configuration, and TCP or SCTP retransmission; the bounded result is a CPU soft lockup and service hang.

The record

CVE
CVE-2022-4269
Published
Dec 5, 2022
Updated
Apr 14, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-833, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 5, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 2025Record 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=Since upstream commit 53592b3 (v4.10-rc1)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Since upstream commit 53592b3 (v4.10-rc1)

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-833Deadlock
T1499Endpoint Denial of Service

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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