CVE-2026-6424

Kernel panic via timed use-after-free

Published Jul 16, 2026 · Updated Jul 16, 2026

Use-after-free in ESET Endpoint Antivirus and Server Security for Linux allows local users to panic the kernel via a timed syscall. During a long-running syscall, the product accesses memory pages that it no longer uses, immediately triggering a kernel panic. Exploitation requires local high privileges, specific circumstances, and precise timing; the bounded consequence is a system-wide denial-of-service crash.

CVSS severity6.7
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in ESET Endpoint Antivirus and Server Security for Linux allows local users to panic the kernel via a timed syscall. During a long-running syscall, the product accesses memory pages that it no longer uses, immediately triggering a kernel panic. Exploitation requires local high privileges, specific circumstances, and precise timing; the bounded consequence is a system-wide denial-of-service crash.

The record

CVE
CVE-2026-6424
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
ESET
Product
ESET Server Security for Linux
Classifications
CWE-416, CAPEC-129, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 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=12.0 <=12.0.287.0 changes=[{"at":"12.0.292.0","status":"unaffected"}]
  2. Affected versionversion=12.1 <=12.1.406.0 changes=[{"at":"12.1.407.0","status":"unaffected"}]
  3. Affected versionversion=12.2 <=12.2.72.0 changes=[{"at":"12.2.73.0","status":"unaffected"}]
  4. Affected versionversion=13.0 <=13.0.34.0 changes=[{"at":"13.0.36.0","status":"unaffected"}]
  5. Affected versionversion=13.1 <=13.1.116.0 changes=[{"at":"13.1.118.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

ESET · ESET Server Security for Linuxversion=12.0 <=12.0.287.0 changes=[{"at":"12.0.292.0","status":"unaffected"}]; version=12.1 <=12.1.406.0 changes=[{"at":"12.1.407.0","status":"unaffected"}]; version=12.2 <=12.2.72.0 changes=[{"at":"12.2.73.0","status":"unaffected"}]; version=13.0 <=13.0.34.0 changes=[{"at":"13.0.36.0","status":"unaffected"}]; version=13.1 <=13.1.116.0 changes=[{"at":"13.1.118.0","status":"unaffected"}]
ESET · ESET Endpoint Antivirus for Linuxversion=12.0 <=12.0.13.0 changes=[{"at":"12.0.14.0","status":"unaffected"}]; version=12.1 <=12.1.1.0 changes=[{"at":"12.1.2.0","status":"unaffected"}]; version=12.2 <=12.2.8.0 changes=[{"at":"12.2.9.0","status":"unaffected"}]; version=13.0 <=13.0.3.0 changes=[{"at":"13.0.5.0","status":"unaffected"}]; version=13.1 <=13.1.3.0 changes=[{"at":"13.1.5.0","status":"unaffected"}]

Published CVSS scores

6.7ESETCVSS:4.0/AV:L/AC:L/AT:N/PR:H/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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CAPEC-129Pointer Manipulation
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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