CVE-2022-48644

Kernel crash via invalid taprio offload teardown

Published Apr 28, 2024 · Updated May 11, 2026

Kernel denial of service in Linux allows local users to crash the system through a malformed taprio qdisc configuration. In sch_taprio.c, taprio_destroy treats the TAPRIO_FLAGS_INVALID value as full-offload enabled and disables offload that was never established. Reachability requires local low-privileged access with permission to configure traffic-control qdiscs and a driver supporting taprio full offload.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Kernel denial of service in Linux allows local users to crash the system through a malformed taprio qdisc configuration. In sch_taprio.c, taprio_destroy treats the TAPRIO_FLAGS_INVALID value as full-offload enabled and disables offload that was never established. Reachability requires local low-privileged access with permission to configure traffic-control qdiscs and a driver supporting taprio full offload.

The record

CVE
CVE-2022-48644
Published
Apr 28, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1529
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 28, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.4
  2. Affected versionversion=9c66d15646760eb8982242b4531c4d4fd36118fd <586def6ebed195f3594a4884f7c5334d0e1ad1bb
  3. Affected versionversion=9c66d15646760eb8982242b4531c4d4fd36118fd <c7c9c7eb305ab8b4e93e4e4e1b78d8cfcbc26323
  4. Affected versionversion=9c66d15646760eb8982242b4531c4d4fd36118fd <d12a1eb07003e597077329767c6aa86a7e972c76
  5. Affected versionversion=9c66d15646760eb8982242b4531c4d4fd36118fd <db46e3a88a09c5cf7e505664d01da7238cd56c92
  6. Affected versionversion=9c66d15646760eb8982242b4531c4d4fd36118fd <f58e43184226e5e9662088ccf1389e424a3a4cbd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.4; version=9c66d15646760eb8982242b4531c4d4fd36118fd <586def6ebed195f3594a4884f7c5334d0e1ad1bb; version=9c66d15646760eb8982242b4531c4d4fd36118fd <c7c9c7eb305ab8b4e93e4e4e1b78d8cfcbc26323; version=9c66d15646760eb8982242b4531c4d4fd36118fd <d12a1eb07003e597077329767c6aa86a7e972c76; version=9c66d15646760eb8982242b4531c4d4fd36118fd <db46e3a88a09c5cf7e505664d01da7238cd56c92; version=9c66d15646760eb8982242b4531c4d4fd36118fd <f58e43184226e5e9662088ccf1389e424a3a4cbd

Published CVSS scores

6.1Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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-476NULL Pointer Dereference
T1529System Shutdown/Reboot

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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