CVE-2026-46302

Local denial of service via exclusive policy open

Published Jun 8, 2026 · Updated Jun 8, 2026

Denial of service in Linux Kernel before 7.0.7 allows local users to block other processes from reading the SELinux policy file. The selinuxfs policy-open path uses a global policy_opened flag to permit only one open file descriptor, so a process can hold it indefinitely. Low-privileged local access to /sys/fs/selinux/policy is required, and the resulting interruption is limited to policy readers.

CVSS severity5.5
Medium
EPSS probability0.10%
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 before 7.0.7 allows local users to block other processes from reading the SELinux policy file. The selinuxfs policy-open path uses a global policy_opened flag to permit only one open file descriptor, so a process can hold it indefinitely. Low-privileged local access to /sys/fs/selinux/policy is required, and the resulting interruption is limited to policy readers.

The record

CVE
CVE-2026-46302
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 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=0 <7.0.7
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <714362f3779dfa453a78ced32396a72726962a41
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a02cd6805562305f936e807da83e253b719dd965

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <7.0.7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <714362f3779dfa453a78ced32396a72726962a41; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a02cd6805562305f936e807da83e253b719dd965

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.

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

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

T1499.004Application or System Exploitation

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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