CVE-2026-64185

Local service interruption via erroneous sysfs directory removal

Published Jul 19, 2026 · Updated Jul 19, 2026

Denial of service in Linux Kernel allows local users to disrupt sysfs state after a named group update fails during file creation. internal_create_group() removes the pre-existing group directory returned by kernfs_find_and_get() when create_files() fails, although the update path did not create that directory. Reachability requires low-privileged local access and a file-creation failure such as memory exhaustion; the erroneous removal can interrupt services that depend on the sysfs group.

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

Denial of service in Linux Kernel allows local users to disrupt sysfs state after a named group update fails during file creation. internal_create_group() removes the pre-existing group directory returned by kernfs_find_and_get() when create_files() fails, although the update path did not create that directory. Reachability requires low-privileged local access and a file-creation failure such as memory exhaustion; the erroneous removal can interrupt services that depend on the sysfs group.

The record

CVE
CVE-2026-64185
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=4.19
  2. Affected versionversion=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8a
  3. Affected versionversion=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <237557b8a81ab948e8332f7c0058e758f081c0a3
  4. Affected versionversion=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <31527d80234caf83dc96ad478645e57df9de4472
  5. Affected versionversion=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <48fa96538bd2868034d33429e4565fda384d0736
  6. Affected versionversion=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <57b285e0368290aa55f79ba11419b96d0ebdb418
  7. Affected versionversion=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <708f6926f61f71e09b5e9fd668b9882ccd46e69f
  8. Affected versionversion=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <c5e125c828b701afaf7493b42a14aa89362ff36d
  9. Affected versionversion=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <ccadd32cc1263802a5969c9efe0e96225450428c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.19; version=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8a; version=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <237557b8a81ab948e8332f7c0058e758f081c0a3; version=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <31527d80234caf83dc96ad478645e57df9de4472; version=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <48fa96538bd2868034d33429e4565fda384d0736; version=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <57b285e0368290aa55f79ba11419b96d0ebdb418; version=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <708f6926f61f71e09b5e9fd668b9882ccd46e69f; version=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <c5e125c828b701afaf7493b42a14aa89362ff36d; version=c855cf2759d27142f771173d9fd8e7fdf9cf5138 <ccadd32cc1263802a5969c9efe0e96225450428c

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 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.

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Technologies

Your stack

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Your stack

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