# bpf: Reject arena frees below the arena base

CVE record · `CVE-2026-93045`

- **Identifiers:** `CVE-2026-93045`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:10 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: `317460317a02a1af512697e6e964298dedd8a163 to before 90453eaf8f14e7be0ab03983f2a93aeb6b990a58` (git)
  - affected: `317460317a02a1af512697e6e964298dedd8a163 to before a968dffa5ab3c74d2ebb3a6233bf8b843f0bfc20` (git)
  - affected: `317460317a02a1af512697e6e964298dedd8a163 to before 8a08635656037aee9c12231ed384449c4ffb1a93` (git)
  - affected: `317460317a02a1af512697e6e964298dedd8a163 to before b5a71cb2db6d84ac0042549dcec266b18429d41e` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.9`
  - unaffected: `before 6.9` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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:** 0.0013, the 2nd 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93045](https://www.cve.org/CVERecord?id=CVE-2026-93045)
- [NVD: CVE-2026-93045](https://nvd.nist.gov/vuln/detail/CVE-2026-93045)

### References from the CNA

- <https://git.kernel.org/stable/c/90453eaf8f14e7be0ab03983f2a93aeb6b990a58>
- <https://git.kernel.org/stable/c/a968dffa5ab3c74d2ebb3a6233bf8b843f0bfc20>
- <https://git.kernel.org/stable/c/8a08635656037aee9c12231ed384449c4ffb1a93>
- <https://git.kernel.org/stable/c/b5a71cb2db6d84ac0042549dcec266b18429d41e>

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-2026-93045>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93045/>. Everything for agents: <https://agentprime.io/llms.txt>.