# bpf: Harden bloom filter sizing and indexing on 32-bit kernels

CVE record · `CVE-2026-89579`

- **Identifiers:** `CVE-2026-89579`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:44 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: `9330986c03006ab1d33d243b7cfe598a7a3c1baa to before a6183bc683f97f4317f7e84939ca7fff37c5688b` (git)
  - affected: `9330986c03006ab1d33d243b7cfe598a7a3c1baa to before 80551bf8912c42d1e3d55eec6fa3c40f306c3de8` (git)
  - affected: `9330986c03006ab1d33d243b7cfe598a7a3c1baa to before 3b7a13eccfcf97714ffc1ca6aa663d66d4a30e29` (git)
  - affected: `9330986c03006ab1d33d243b7cfe598a7a3c1baa to before 272fcb4ba6fab678db0eb966dc81c4c804bef64a` (git)
  - affected: `9330986c03006ab1d33d243b7cfe598a7a3c1baa to before dff481e12b3f127739f6a4ea7cef2c25dc12e056` (git)
  - affected: `9330986c03006ab1d33d243b7cfe598a7a3c1baa to before 11c1e836710dcba03e50454a4eedfdbaf8d3050e` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.16`
  - unaffected: `before 5.16` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0017, the 6th percentile, on 14 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89579](https://www.cve.org/CVERecord?id=CVE-2026-89579)
- [NVD: CVE-2026-89579](https://nvd.nist.gov/vuln/detail/CVE-2026-89579)

### References from the CNA

- <https://git.kernel.org/stable/c/a6183bc683f97f4317f7e84939ca7fff37c5688b>
- <https://git.kernel.org/stable/c/80551bf8912c42d1e3d55eec6fa3c40f306c3de8>
- <https://git.kernel.org/stable/c/3b7a13eccfcf97714ffc1ca6aa663d66d4a30e29>
- <https://git.kernel.org/stable/c/272fcb4ba6fab678db0eb966dc81c4c804bef64a>
- <https://git.kernel.org/stable/c/dff481e12b3f127739f6a4ea7cef2c25dc12e056>
- <https://git.kernel.org/stable/c/11c1e836710dcba03e50454a4eedfdbaf8d3050e>

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-2026-89579>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89579/>. Everything for agents: <https://agentprime.io/llms.txt>.