CVE-2026-23284

Service interruption via XDP program refcount mishandling

Published Mar 25, 2026 · Updated Mar 25, 2026

Resource-management error in the Linux Kernel allows local users to interrupt service during failed MediaTek Ethernet XDP setup. In mtk_xdp_setup(), an mtk_open() failure leaves the eBPF program pointer on the replacement program and decrements old_prog's reference count instead of restoring the pointer without releasing the old program. The path requires local privileges to reconfigure XDP on a MediaTek Ethernet device and an mtk_open() failure; the published impact is loss of system availability.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-management error in the Linux Kernel allows local users to interrupt service during failed MediaTek Ethernet XDP setup. In mtk_xdp_setup(), an mtk_open() failure leaves the eBPF program pointer on the replacement program and decrements old_prog's reference count instead of restoring the pointer without releasing the old program. The path requires local privileges to reconfigure XDP on a MediaTek Ethernet device and an mtk_open() failure; the published impact is loss of system availability.

The record

CVE
CVE-2026-23284
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=6.0
  2. Affected versionversion=7c26c20da5d420cde55618263be4aa2f6de53056 <0abc73c8a40fd64ac1739c90bb4f42c418d27a5e
  3. Affected versionversion=7c26c20da5d420cde55618263be4aa2f6de53056 <29629dd7d37349e9fb605375a75de44ac8926ea9
  4. Affected versionversion=7c26c20da5d420cde55618263be4aa2f6de53056 <6f95b59520278a72df9905db791b7ea31375fbc1
  5. Affected versionversion=7c26c20da5d420cde55618263be4aa2f6de53056 <8c2d76a9658a4dbfcf02f2693a97e2d5ff42197a
  6. Affected versionversion=7c26c20da5d420cde55618263be4aa2f6de53056 <b73dfe1ea7be7a072482434643b517d7726f4c8d
  7. Affected versionversion=7c26c20da5d420cde55618263be4aa2f6de53056 <ff14cd44c85c20ad69479db73698185de291550c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.0; version=7c26c20da5d420cde55618263be4aa2f6de53056 <0abc73c8a40fd64ac1739c90bb4f42c418d27a5e; version=7c26c20da5d420cde55618263be4aa2f6de53056 <29629dd7d37349e9fb605375a75de44ac8926ea9; version=7c26c20da5d420cde55618263be4aa2f6de53056 <6f95b59520278a72df9905db791b7ea31375fbc1; version=7c26c20da5d420cde55618263be4aa2f6de53056 <8c2d76a9658a4dbfcf02f2693a97e2d5ff42197a; version=7c26c20da5d420cde55618263be4aa2f6de53056 <b73dfe1ea7be7a072482434643b517d7726f4c8d; version=7c26c20da5d420cde55618263be4aa2f6de53056 <ff14cd44c85c20ad69479db73698185de291550c

Published CVSS scores

5.5NIST NVDCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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