CVE-2026-98214Hinoki check available

Local execution-policy bypass via skipped overlayfs layers

Published Oct 6, 2026 · Updated Oct 6, 2026

SELinux access-control bypass in affected Linux kernels allows local users to execute policy-denied files through nested overlayfs mappings. During mprotect(), the SELinux file hook sees only the lowest backing file in vma->vm_file and fails to recheck the mounters and labels of intermediate layers that mmap() checks. Exploitation requires nested stacked filesystems and an enforcing policy that denies execution on an intermediate layer; mapping without execute permission and then adding it bypasses that denial.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SELinux access-control bypass in affected Linux kernels allows local users to execute policy-denied files through nested overlayfs mappings. During mprotect(), the SELinux file hook sees only the lowest backing file in vma->vm_file and fails to recheck the mounters and labels of intermediate layers that mmap() checks. Exploitation requires nested stacked filesystems and an enforcing policy that denies execution on an intermediate layer; mapping without execute permission and then adding it bypasses that denial.

The record

CVE
CVE-2026-98214
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.12.95 <6.12.112
  2. Affected versionversion=6.18.38 <6.18.54
  3. Affected versionversion=6.6.144 <6.6.158
  4. Affected versionversion=7.0.4 <7.1
  5. Affected versionversion=7.1
  6. Affected versionversion=82544d36b1729153c8aeb179e84750f0c085d3b1 <78fc54b934bfb2c18aad8154c7302067146946f9
  7. Affected versionversion=82544d36b1729153c8aeb179e84750f0c085d3b1 <c2bbb905af2293549651b614a52ad91e0b462b60
  8. Affected versionversion=8bacd09f12c27710228562e4d13163e58c5f4a45 <89376fbfdcc1a728e1775f98752cdd90b0930a00
  9. Affected versionversion=bc6c380c1159de52a252ed11f19a42c47f60a735 <4d50ebe5a27724e020747ffd61a051dec67cb8ec
  10. Affected versionversion=cd0e707a927a70cdfd8bc5a512a9719a87f5ed51
  11. Affected versionversion=d844702198395d3f80222777030f69db6be6b709 <d127c7e1f3e1231d8ac8b2738e3f00bea12afe74

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.12.95 <6.12.112; version=6.18.38 <6.18.54; version=6.6.144 <6.6.158; version=7.0.4 <7.1; version=7.1; version=82544d36b1729153c8aeb179e84750f0c085d3b1 <78fc54b934bfb2c18aad8154c7302067146946f9; version=82544d36b1729153c8aeb179e84750f0c085d3b1 <c2bbb905af2293549651b614a52ad91e0b462b60; version=8bacd09f12c27710228562e4d13163e58c5f4a45 <89376fbfdcc1a728e1775f98752cdd90b0930a00; version=bc6c380c1159de52a252ed11f19a42c47f60a735 <4d50ebe5a27724e020747ffd61a051dec67cb8ec; version=cd0e707a927a70cdfd8bc5a512a9719a87f5ed51; version=d844702198395d3f80222777030f69db6be6b709 <d127c7e1f3e1231d8ac8b2738e3f00bea12afe74

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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