CVE-2024-26669Public exploit

Local service interruption via chain-template memory leak

Published Apr 2, 2024 · Updated May 11, 2026

Memory leak in Linux kernel traffic-control flower offload allows local users to exhaust kernel memory through repeated qdisc deletion. During filter-block unbinding, the flower classifier omits the FLOW_CLS_TMPLT_DESTROY command, leaving hardware-offloaded chain-template allocations referenced. Reaching the flaw requires privileges to configure traffic control on an offloaded switch port; repeated teardown can deplete memory and interrupt service.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Linux kernel traffic-control flower offload allows local users to exhaust kernel memory through repeated qdisc deletion. During filter-block unbinding, the flower classifier omits the FLOW_CLS_TMPLT_DESTROY command, leaving hardware-offloaded chain-template allocations referenced. Reaching the flaw requires privileges to configure traffic control on an offloaded switch port; repeated teardown can deplete memory and interrupt service.

The record

CVE
CVE-2024-26669
Published
Apr 2, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 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

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=5.1
  2. Affected versionversion=bbf73830cd48cff1599811d4f69c7cfd49c7b869 <32f2a0afa95fae0d1ceec2ff06e0e816939964b8
  3. Affected versionversion=bbf73830cd48cff1599811d4f69c7cfd49c7b869 <9ed46144cff3598a5cf79955630e795ff9af5b97
  4. Affected versionversion=bbf73830cd48cff1599811d4f69c7cfd49c7b869 <c04709b2cc99ae31c346f79f0211752d7b74df01

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=bbf73830cd48cff1599811d4f69c7cfd49c7b869 <32f2a0afa95fae0d1ceec2ff06e0e816939964b8; version=bbf73830cd48cff1599811d4f69c7cfd49c7b869 <9ed46144cff3598a5cf79955630e795ff9af5b97; version=bbf73830cd48cff1599811d4f69c7cfd49c7b869 <c04709b2cc99ae31c346f79f0211752d7b74df01

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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

CWE-787Out-of-bounds Write
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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