# perf/x86/intel: Fix kernel address leakages in LBR stack

CVE record · `CVE-2026-89984`

- **Identifiers:** `CVE-2026-89984`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `47125db27e47e9d44c878bf8925aa057824bb0d5 to before f3705db4e6378cc1b91a38ce0fe2f879055e23ca` (git)
  - affected: `47125db27e47e9d44c878bf8925aa057824bb0d5 to before b589147f54adc62e4172e4acf079ad5fb7b3687f` (git)
  - affected: `47125db27e47e9d44c878bf8925aa057824bb0d5 to before be0628a101ac05b085aaa4f650d48bd3915e80fa` (git)
  - affected: `47125db27e47e9d44c878bf8925aa057824bb0d5 to before ca19a175e89b7de604fab736436cbab74030b47a` (git)
  - affected: `47125db27e47e9d44c878bf8925aa057824bb0d5 to before 6ac26161db27f7fb9d9e89ae240dbe52795496cc` (git)
  - affected: `47125db27e47e9d44c878bf8925aa057824bb0d5 to before 3c492c8eba02698ca893a9a13388d2adf6dfb839` (git)
  - affected: `47125db27e47e9d44c878bf8925aa057824bb0d5 to before 68c4b780b266a435261a1e029bede5ee3c2735cc` (git)
  - affected: `47125db27e47e9d44c878bf8925aa057824bb0d5 to before e2b0575900ff72aa82748af96e7bd564ade5157a` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.9`
  - unaffected: `before 5.9` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0022, the 12th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89984](https://www.cve.org/CVERecord?id=CVE-2026-89984)
- [NVD: CVE-2026-89984](https://nvd.nist.gov/vuln/detail/CVE-2026-89984)

### References from the CNA

- <https://git.kernel.org/stable/c/f3705db4e6378cc1b91a38ce0fe2f879055e23ca>
- <https://git.kernel.org/stable/c/b589147f54adc62e4172e4acf079ad5fb7b3687f>
- <https://git.kernel.org/stable/c/be0628a101ac05b085aaa4f650d48bd3915e80fa>
- <https://git.kernel.org/stable/c/ca19a175e89b7de604fab736436cbab74030b47a>
- <https://git.kernel.org/stable/c/6ac26161db27f7fb9d9e89ae240dbe52795496cc>
- <https://git.kernel.org/stable/c/3c492c8eba02698ca893a9a13388d2adf6dfb839>
- <https://git.kernel.org/stable/c/68c4b780b266a435261a1e029bede5ee3c2735cc>
- <https://git.kernel.org/stable/c/e2b0575900ff72aa82748af96e7bd564ade5157a>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-89984>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89984/>. Everything for agents: <https://agentprime.io/llms.txt>.