CVE-2026-64157

Service interruption via incorrect dirty-region offset

Published Jul 19, 2026 · Updated Jul 19, 2026

Incorrect dirty-region tracking in Linux Kernel 6.10.8 through 6.11 allows local users to interrupt service through partial folio invalidation. netfs_invalidate_folio() sets finfo->dirty_offset to the invalidation start rather than its end when invalidation overlaps the front of a dirty streaming-write region. The path requires a dirty, non-uptodate streaming-write folio with that overlap, and the published assessment limits the consequence to service interruption.

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

Incorrect dirty-region tracking in Linux Kernel 6.10.8 through 6.11 allows local users to interrupt service through partial folio invalidation. netfs_invalidate_folio() sets finfo->dirty_offset to the invalidation start rather than its end when invalidation overlaps the front of a dirty streaming-write region. The path requires a dirty, non-uptodate streaming-write folio with that overlap, and the published assessment limits the consequence to service interruption.

The record

CVE
CVE-2026-64157
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=6.10.8 <6.11
  2. Affected versionversion=6.11
  3. Affected versionversion=cce6bfa6ca0e30af9927b0074c97fe6a92f28092 <3d9601c029b934b5b6a10f99791467b10eb6b211
  4. Affected versionversion=cce6bfa6ca0e30af9927b0074c97fe6a92f28092 <6a3d27116be2c5fb9a03d5cf37c486ac517f3689
  5. Affected versionversion=cce6bfa6ca0e30af9927b0074c97fe6a92f28092 <6d91acc7fb85d33ea58fca9b964a32a453937f4b
  6. Affected versionversion=cce6bfa6ca0e30af9927b0074c97fe6a92f28092 <f6b2569ae29b666fd15ff2848684c445ba442a39
  7. Affected versionversion=e2814004138a541110d4b2dc254a8f619c2c4ce0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.10.8 <6.11; version=6.11; version=cce6bfa6ca0e30af9927b0074c97fe6a92f28092 <3d9601c029b934b5b6a10f99791467b10eb6b211; version=cce6bfa6ca0e30af9927b0074c97fe6a92f28092 <6a3d27116be2c5fb9a03d5cf37c486ac517f3689; version=cce6bfa6ca0e30af9927b0074c97fe6a92f28092 <6d91acc7fb85d33ea58fca9b964a32a453937f4b; version=cce6bfa6ca0e30af9927b0074c97fe6a92f28092 <f6b2569ae29b666fd15ff2848684c445ba442a39; version=e2814004138a541110d4b2dc254a8f619c2c4ce0

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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