# bpf: Fix potential UAF in bpf_netns_link_update_prog

CVE record · `CVE-2026-90393`

- **Identifiers:** `CVE-2026-90393`
- **State:** Confirmed
- **Severity:** No CVSS score
- **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, 16:09 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: `7f045a49fee04b5662cbdeaf0838f9322ae8c63a to before d462b5481d77ce7df8a5ff89a699386f00c9214d` (git)
  - affected: `7f045a49fee04b5662cbdeaf0838f9322ae8c63a to before bdddf3e1493ee973619c154a57071ce67f78598b` (git)
  - affected: `7f045a49fee04b5662cbdeaf0838f9322ae8c63a to before 79a66fd997d4eecf17302d613194879eb32e0986` (git)
  - affected: `7f045a49fee04b5662cbdeaf0838f9322ae8c63a to before f4ce6803df4095777191d800bebc50219b615ca0` (git)
  - affected: `7f045a49fee04b5662cbdeaf0838f9322ae8c63a to before 277168cb9d153ce8e9c3f9275670e32ae61b41d6` (git)
  - affected: `7f045a49fee04b5662cbdeaf0838f9322ae8c63a to before bda86e9f31b9a296b6e64a51c91dc776fc9f613e` (git)
  - affected: `7f045a49fee04b5662cbdeaf0838f9322ae8c63a to before 923f559e95b89b33c7e1793b3d8f7f4ec9b2e4b7` (git)
  - affected: `7f045a49fee04b5662cbdeaf0838f9322ae8c63a to before 5c5997836381010fc5907b36bc17d3b19407e933` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.8`
  - unaffected: `before 5.8` (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: `6.18.52 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0023, the 14th 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90393](https://www.cve.org/CVERecord?id=CVE-2026-90393)
- [NVD: CVE-2026-90393](https://nvd.nist.gov/vuln/detail/CVE-2026-90393)

### References from the CNA

- <https://git.kernel.org/stable/c/d462b5481d77ce7df8a5ff89a699386f00c9214d>
- <https://git.kernel.org/stable/c/bdddf3e1493ee973619c154a57071ce67f78598b>
- <https://git.kernel.org/stable/c/79a66fd997d4eecf17302d613194879eb32e0986>
- <https://git.kernel.org/stable/c/f4ce6803df4095777191d800bebc50219b615ca0>
- <https://git.kernel.org/stable/c/277168cb9d153ce8e9c3f9275670e32ae61b41d6>
- <https://git.kernel.org/stable/c/bda86e9f31b9a296b6e64a51c91dc776fc9f613e>
- <https://git.kernel.org/stable/c/923f559e95b89b33c7e1793b3d8f7f4ec9b2e4b7>
- <https://git.kernel.org/stable/c/5c5997836381010fc5907b36bc17d3b19407e933>

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-2026-90393>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90393/>. Everything for agents: <https://agentprime.io/llms.txt>.