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PatchSiren cyber security CVE debrief

CVE-2026-64185 Linux CVE debrief

A vulnerability in the Linux kernel has been resolved. The issue occurs when sysfs_update_group() is called for a named group and create_files() fails, causing internal_create_group() to remove the group directory. This can lead to the silent destruction of a sysfs group that the caller did not create. The directory remains empty after remove_files() is called inside create_files(), but can be repopulated on a retry. Linux kernel developers and maintainers should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance.

Vendor
Linux
Product
Unknown
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-19
Original CVE updated
2026-08-11
Advisory published
2026-07-19
Advisory updated
2026-08-11

Who should care

Linux kernel developers and maintainers, as well as security teams and operators, should be aware of this vulnerability and take necessary actions to ensure the stability and security of the kernel. They should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance. Affected product deployments should be identified, and owners should be assigned for follow-up.

Technical summary

The vulnerability is caused by the incorrect removal of a sysfs group directory when create_files() fails during the update process. To fix this, the directory should only be removed if it was created by the same function. This issue affects the Linux kernel, and developers should review the official advisory and CVE record for more information. The vulnerability has a medium defensive priority, and compensating controls should be implemented to monitor sysfs group directory creation and removal.

Defensive priority

Medium

Recommended defensive actions

  • Review and verify the Linux kernel version to ensure it is up-to-date
  • Implement compensating controls to monitor sysfs group directory creation and removal
  • Exception tracking and retest procedures should be in place
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-19T16:18:00.917Z and has not been modified since then. The NVD entry is currently Received. There is limited information available about this vulnerability, and further verification is needed to understand its impact. Defenders should review the official CVE record and NVD entry for more information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-64185 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-64185

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-64185 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-64185

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8a

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/237557b8a81ab948e8332f7c0058e758f081c0a3

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/31527d80234caf83dc96ad478645e57df9de4472

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/48fa96538bd2868034d33429e4565fda384d0736

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/57b285e0368290aa55f79ba11419b96d0ebdb418

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/708f6926f61f71e09b5e9fd668b9882ccd46e69f

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/c5e125c828b701afaf7493b42a14aa89362ff36d

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.