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CVE Record

CVE-2026-23144: mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure

In the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure When a context DAMON sysfs directory setup is failed after setup of attrs/ directory, subdirectories of attrs/ directory are not cleaned up. As a result, DAMON sysfs interface is nearly broken until the system reboots, and the memory for the unremoved directory is leaked. Cleanup the directories under such failures.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-23144 is a Linux kernel issue in the DAMON sysfs memory-monitoring interface. If setup of a DAMON context directory fails after creating attributes, cleanup is incomplete. This can leave DAMON sysfs nearly unusable until reboot and leak kernel memory. No active exploitation is reported in the provided sources.

Executive priority

Treat as a routine-to-priority kernel maintenance item, not an emergency based on current evidence. Prioritize platforms relying on DAMON sysfs or memory observability. Patch through normal kernel update channels and validate vendor backports.

Technical view

The flaw is in mm/damon/sysfs cleanup logic. On context directory setup failure after attrs/ creation, subdirectories under attrs/ are not removed. The upstream fix cleans those directories on failure. The CVE record lists Linux kernel affected versions and multiple stable-tree fix commits.

Likely exposure

Exposure is likely limited to Linux systems using or enabling the DAMON sysfs interface. Systems not using DAMON sysfs may have lower practical risk, but kernel versions should still be checked against vendor advisories and stable fixes.

Exploitation context

The sources describe a failure-path cleanup bug causing DAMON sysfs disruption and memory leakage. They do not describe remote exploitation, privilege escalation, public exploit code, or confirmed active exploitation. The CVE is not marked KEV in the provided bundle.

Researcher notes

The record lacks CVSS, CWE, and detailed affected range semantics beyond listed kernel versions and commits. Analysis should focus on the DAMON sysfs failure path and whether local conditions can trigger repeated setup failures. Avoid assuming broader impact without kernel or vendor confirmation.

Mitigation direction

  • Update to a Linux kernel containing the referenced stable fix commits.
  • Check distribution vendor advisories for backported fixes and supported package versions.
  • Prioritize systems where DAMON sysfs is enabled or used for operations.
  • Plan reboot if DAMON sysfs becomes broken before patching.

Validation and detection

  • Inventory Linux kernel versions across affected assets.
  • Confirm whether DAMON sysfs is enabled or operationally used.
  • Verify installed kernels include the relevant stable fix or vendor backport.
  • Review kernel and monitoring logs for DAMON sysfs setup failures.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2026-23144 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
6Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxc951cd3b89010c7a4751b9d4ea074007e44851e6, c951cd3b89010c7a4751b9d4ea074007e44851e6, c951cd3b89010c7a4751b9d4ea074007e44851e6, c951cd3b89010c7a4751b9d4ea074007e44851e6, c951cd3b89010c7a4751b9d4ea074007e44851e6unaffected
LinuxLinux5.18, 0, 6.1.162, 6.6.122, 6.12.67, 6.18.7, 6.19affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.