CVE-2024-46800

Local privilege escalation via stale netem queue accounting

Published Sep 18, 2024 · Updated Aug 5, 2026

Use-after-free in affected Linux kernel branches allows local users to gain kernel privileges or crash the system via traffic control. netem_dequeue drops a packet returned as __NET_XMIT_STOLEN without reducing the parent queue length, leaving stale accounting that later dereferences a freed DRR class. Exploitation requires CAP_NET_ADMIN in a network namespace and a crafted netem, DRR, and mirred topology; no user interaction is required.

CVSS severity7.8
High
EPSS probability0.27%
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 affected Linux kernel branches allows local users to gain kernel privileges or crash the system via traffic control. netem_dequeue drops a packet returned as __NET_XMIT_STOLEN without reducing the parent queue length, leaving stale accounting that later dereferences a freed DRR class. Exploitation requires CAP_NET_ADMIN in a network namespace and a crafted netem, DRR, and mirred topology; no user interaction is required.

The record

CVE
CVE-2024-46800
Published
Sep 18, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 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=3.3
  2. Affected versionversion=50612537e9ab29693122fab20fc1eed235054ffe <14f91ab8d391f249b845916820a56f42cf747241
  3. Affected versionversion=50612537e9ab29693122fab20fc1eed235054ffe <295ad5afd9efc5f67b86c64fce28fb94e26dc4c9
  4. Affected versionversion=50612537e9ab29693122fab20fc1eed235054ffe <32008ab989ddcff1a485fa2b4906234c25dc5cd6
  5. Affected versionversion=50612537e9ab29693122fab20fc1eed235054ffe <3b3a2a9c6349e25a025d2330f479bc33a6ccb54a
  6. Affected versionversion=50612537e9ab29693122fab20fc1eed235054ffe <98c75d76187944296068d685dfd8a1e9fd8c4fdc
  7. Affected versionversion=50612537e9ab29693122fab20fc1eed235054ffe <db2c235682913a63054e741fe4e19645fdf2d68e
  8. Affected versionversion=50612537e9ab29693122fab20fc1eed235054ffe <dde33a9d0b80aae0c69594d1f462515d7ff1cb3d
  9. Affected versionversion=50612537e9ab29693122fab20fc1eed235054ffe <f0bddb4de043399f16d1969dad5ee5b984a64e7b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.3; version=50612537e9ab29693122fab20fc1eed235054ffe <14f91ab8d391f249b845916820a56f42cf747241; version=50612537e9ab29693122fab20fc1eed235054ffe <295ad5afd9efc5f67b86c64fce28fb94e26dc4c9; version=50612537e9ab29693122fab20fc1eed235054ffe <32008ab989ddcff1a485fa2b4906234c25dc5cd6; version=50612537e9ab29693122fab20fc1eed235054ffe <3b3a2a9c6349e25a025d2330f479bc33a6ccb54a; version=50612537e9ab29693122fab20fc1eed235054ffe <98c75d76187944296068d685dfd8a1e9fd8c4fdc; version=50612537e9ab29693122fab20fc1eed235054ffe <db2c235682913a63054e741fe4e19645fdf2d68e; version=50612537e9ab29693122fab20fc1eed235054ffe <dde33a9d0b80aae0c69594d1f462515d7ff1cb3d; version=50612537e9ab29693122fab20fc1eed235054ffe <f0bddb4de043399f16d1969dad5ee5b984a64e7b

Published CVSS scores

7.8CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-416Use After Free
T1068Exploitation for Privilege Escalation

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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