CVE-2026-43264

Service interruption via display-timing refcount leak

Published May 6, 2026 · Updated May 6, 2026

A refcount leak in affected Linux Kernel releases starting with 3.9 allows local users to interrupt service via display timing parsing. The leak occurs when of_parse_phandle() increments the native_mode device-node reference and later parsing errors jump to entryfail without calling of_node_put(). Low-privilege local access is required; repeated triggering consumes kernel memory and interrupts service without disclosing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A refcount leak in affected Linux Kernel releases starting with 3.9 allows local users to interrupt service via display timing parsing. The leak occurs when of_parse_phandle() increments the native_mode device-node reference and later parsing errors jump to entryfail without calling of_node_put(). Low-privilege local access is required; repeated triggering consumes kernel memory and interrupts service without disclosing or modifying data.

The record

CVE
CVE-2026-43264
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=3.9
  2. Affected versionversion=cc3f414cf2e404130584b63d373161ba6fd24bc2 <20881ad42e651c69d89eb38a2042838187900fd6
  3. Affected versionversion=cc3f414cf2e404130584b63d373161ba6fd24bc2 <2b22e4fe1273c24f405ed7903349c4bbd82b6368
  4. Affected versionversion=cc3f414cf2e404130584b63d373161ba6fd24bc2 <3ed019654234edb8625c05d05e15d40f74e64f70
  5. Affected versionversion=cc3f414cf2e404130584b63d373161ba6fd24bc2 <69290f2d3999c5fa1a7f5d5593cfc5461fa3ee64
  6. Affected versionversion=cc3f414cf2e404130584b63d373161ba6fd24bc2 <b5bdcc5afbff845834d04d651773cb6b47db5dd3
  7. Affected versionversion=cc3f414cf2e404130584b63d373161ba6fd24bc2 <c5734f9030a8b1e13868d1641b5163d8e659306e
  8. Affected versionversion=cc3f414cf2e404130584b63d373161ba6fd24bc2 <d6f34bbff07476c6abb8672c89d217824871c5ed
  9. Affected versionversion=cc3f414cf2e404130584b63d373161ba6fd24bc2 <eacf9840ae1285a1ef47eb0ce16d786e542bd4d7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.9; version=cc3f414cf2e404130584b63d373161ba6fd24bc2 <20881ad42e651c69d89eb38a2042838187900fd6; version=cc3f414cf2e404130584b63d373161ba6fd24bc2 <2b22e4fe1273c24f405ed7903349c4bbd82b6368; version=cc3f414cf2e404130584b63d373161ba6fd24bc2 <3ed019654234edb8625c05d05e15d40f74e64f70; version=cc3f414cf2e404130584b63d373161ba6fd24bc2 <69290f2d3999c5fa1a7f5d5593cfc5461fa3ee64; version=cc3f414cf2e404130584b63d373161ba6fd24bc2 <b5bdcc5afbff845834d04d651773cb6b47db5dd3; version=cc3f414cf2e404130584b63d373161ba6fd24bc2 <c5734f9030a8b1e13868d1641b5163d8e659306e; version=cc3f414cf2e404130584b63d373161ba6fd24bc2 <d6f34bbff07476c6abb8672c89d217824871c5ed; version=cc3f414cf2e404130584b63d373161ba6fd24bc2 <eacf9840ae1285a1ef47eb0ce16d786e542bd4d7

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CanonicalCVSS: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

T1499Endpoint Denial of Service

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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