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NVD / CVE Program· CNA Linux

CVE-2026-64185: sysfs: don't remove existing directory on update failure

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.11% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8a, 237557b8a81ab948e8332f7c0058e758f081c0a3, 31527d80234caf83dc96ad478645e57df9de4472.

Low priority for now. Upgrade to Linux Linux 14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8a, 237557b8a81ab948e8332f7c0058e758f081c0a3, 31527d80234caf83dc96ad478645e57df9de4472 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: sysfs: don't remove existing directory on update failure When sysfs_update_group() is called for a named group and create_files() fails (e.g. -ENOMEM), internal_create_group() calls kernfs_remove(kn) on the group directory. In the update path, kn was obtained via kernfs_find_and_get() and refers to a directory that already existed before this call. Removing it silently destroys a sysfs group that the caller did not create. Only remove the directory if we created it ourselves. On update failure the directory remains as it is left empty by remove_files() inside create_files(), but can be repopulated by a retry.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 19, 2026
Updated
Aug 11, 2026
EPSS
0.1% · 1th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.19 and later · before 5.10.258
  • linux linux kernel5.11 and later · before 5.15.209
  • linux linux kernel5.16 and later · before 6.1.175
  • linux linux kernel6.2 and later · before 6.6.142
  • linux linux kernel6.7 and later · before 6.12.92
  • linux linux kernel6.13 and later · before 6.18.34
  • linux linux kernel6.19 and later · before 7.0.11
  • linux linux kernel7.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.19affected
    • c855cf2759d27142f771173d9fd8e7fdf9cf5138 and later · before c5e125c828b701afaf7493b42a14aa89362ff36daffected · git
    • c855cf2759d27142f771173d9fd8e7fdf9cf5138 and later · before ccadd32cc1263802a5969c9efe0e96225450428caffected · git
    • c855cf2759d27142f771173d9fd8e7fdf9cf5138 and later · before 14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8aaffected · git
    • c855cf2759d27142f771173d9fd8e7fdf9cf5138 and later · before 31527d80234caf83dc96ad478645e57df9de4472affected · git
    • c855cf2759d27142f771173d9fd8e7fdf9cf5138 and later · before 57b285e0368290aa55f79ba11419b96d0ebdb418affected · git
    • c855cf2759d27142f771173d9fd8e7fdf9cf5138 and later · before 48fa96538bd2868034d33429e4565fda384d0736affected · git
    • c855cf2759d27142f771173d9fd8e7fdf9cf5138 and later · before 708f6926f61f71e09b5e9fd668b9882ccd46e69faffected · git
    • c855cf2759d27142f771173d9fd8e7fdf9cf5138 and later · before 237557b8a81ab948e8332f7c0058e758f081c0a3affected · git
    • before 4.19not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.12-17.0.12-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-64183Jul 19, 2026 · efi: Allocate runtime workqueue before ACPI init
    22Monitor
  • ← EarlierCVE-2026-64184Jul 19, 2026 · mm/damon/sysfs-schemes: call missing mem_cgroup_iter_break()
    22Monitor
  • Later →CVE-2026-64186Jul 19, 2026 · iommu/amd: Remove latent out-of-bounds access in IOMMU debugfs
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8aVendor (CNA)
Linux Linux237557b8a81ab948e8332f7c0058e758f081c0a3Vendor (CNA)
Linux Linux31527d80234caf83dc96ad478645e57df9de4472Vendor (CNA)
Linux Linux48fa96538bd2868034d33429e4565fda384d0736Vendor (CNA)
Linux Linux57b285e0368290aa55f79ba11419b96d0ebdb418Vendor (CNA)
Linux Linux708f6926f61f71e09b5e9fd668b9882ccd46e69fVendor (CNA)
Linux Linuxc5e125c828b701afaf7493b42a14aa89362ff36dVendor (CNA)
Linux Linuxccadd32cc1263802a5969c9efe0e96225450428cVendor (CNA)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records