CVE-2026-31653

Local service interruption via DAMON memory leak

Published Apr 24, 2026 · Updated Apr 24, 2026

Memory leak in the Linux kernel DAMON sysfs interface allows local users to consume kernel memory through privileged DAMON operations. When kdamond stops before damon_call() handles repeat_call_control, the failure path leaves the dynamically allocated control object undeallocated. The interface requires CONFIG_DAMON_SYSFS and privileged access; repeated triggering can exhaust memory and interrupt the system.

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

Memory leak in the Linux kernel DAMON sysfs interface allows local users to consume kernel memory through privileged DAMON operations. When kdamond stops before damon_call() handles repeat_call_control, the failure path leaves the dynamically allocated control object undeallocated. The interface requires CONFIG_DAMON_SYSFS and privileged access; repeated triggering can exhaust memory and interrupt the system.

The record

CVE
CVE-2026-31653
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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=04a06b139ec08aa63d7377f6d3e5218f8ddb1c5d <0199390a6b92fc21860e1b858abf525c7e73b956
  2. Affected versionversion=04a06b139ec08aa63d7377f6d3e5218f8ddb1c5d <0655f5cf1735508394ef8af98ddcfab3ac1c1cc5
  3. Affected versionversion=04a06b139ec08aa63d7377f6d3e5218f8ddb1c5d <b9dadf026a9fb681ed32a0646adc10ab485bf3b1
  4. Affected versionversion=6.17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=04a06b139ec08aa63d7377f6d3e5218f8ddb1c5d <0199390a6b92fc21860e1b858abf525c7e73b956; version=04a06b139ec08aa63d7377f6d3e5218f8ddb1c5d <0655f5cf1735508394ef8af98ddcfab3ac1c1cc5; version=04a06b139ec08aa63d7377f6d3e5218f8ddb1c5d <b9dadf026a9fb681ed32a0646adc10ab485bf3b1; version=6.17

Published CVSS scores

5.5NVDCVSS: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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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