CVE-2026-59677Public exploit

Local process termination via unauthorized context matching

Published Jul 23, 2026 · Updated Jul 23, 2026

Missing authorization in SELinux policycoreutils 3.10 and earlier allows local users to kill root-owned processes via seunshare. When invoked with --kill and a caller-supplied context, seunshare's killall() matches processes by SELinux context and sends SIGKILL without verifying process ownership or authorization. The caller must run in an unconfined SELinux context, and PID traversal can limit the affected range because seunshare can kill itself; successful abuse interrupts targeted unconfined processes.

CVSS severity6.8
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in SELinux policycoreutils 3.10 and earlier allows local users to kill root-owned processes via seunshare. When invoked with --kill and a caller-supplied context, seunshare's killall() matches processes by SELinux context and sends SIGKILL without verifying process ownership or authorization. The caller must run in an unconfined SELinux context, and PID traversal can limit the affected range because seunshare can kill itself; successful abuse interrupts targeted unconfined processes.

The record

CVE
CVE-2026-59677
Published
Jul 23, 2026
Updated
Jul 23, 2026
Vendor
SELinux Project
Product
SELinux
Classifications
CWE-862, T1489
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 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 <=3.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

SELinux Project · SELinuxversion=0 <=3.10

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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 exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1489Service Stop

Public exploit references

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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