# bpf: Copy per-CPU map value padding in copy_map_value_long()

CVE record · `CVE-2026-93174`

- **Identifiers:** `CVE-2026-93174`
- **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:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:12 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: `448325199f574d33824dbf9121efb03558412966 to before e0653c8f718109d140e806daac166c43e2b2b8bd` (git)
  - affected: `448325199f574d33824dbf9121efb03558412966 to before 953e85da53541a8dc3e7ad4e8532f29a34a32eae` (git)
  - affected: `448325199f574d33824dbf9121efb03558412966 to before 003bf840ed3326bd01396ce7d5b431cef0d371e7` (git)
  - affected: `448325199f574d33824dbf9121efb03558412966 to before 5e9f69829835521aa2942d1d14bd0990fbc6991e` (git)
  - affected: `448325199f574d33824dbf9121efb03558412966 to before ff3f22ed8d2f350b4c24ee26e33daea5f08d58ef` (git)
  - affected: `448325199f574d33824dbf9121efb03558412966 to before 7cf9cd98cf6f0df3befc167ca6b54c07014d71de` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.1`
  - unaffected: `before 6.1` (semver)
  - unaffected: `6.1.191 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

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Linux kernel BPF per-CPU maps with special fields are affected when the value size is not a multiple of 8, starting with 6.1. Lookups can return stale kernel heap contents from value padding to user space. Upgrade to 6.1.191, 6.6.157, 6.12.110, 6.18.52, or a later release in those series. No workaround is listed.

Written 12 Nov 2026.

## 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:** 0.0017, the 6th 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-2026-93174](https://www.cve.org/CVERecord?id=CVE-2026-93174)
- [NVD: CVE-2026-93174](https://nvd.nist.gov/vuln/detail/CVE-2026-93174)

### References from the CNA

- <https://git.kernel.org/stable/c/e0653c8f718109d140e806daac166c43e2b2b8bd>
- <https://git.kernel.org/stable/c/953e85da53541a8dc3e7ad4e8532f29a34a32eae>
- <https://git.kernel.org/stable/c/003bf840ed3326bd01396ce7d5b431cef0d371e7>
- <https://git.kernel.org/stable/c/5e9f69829835521aa2942d1d14bd0990fbc6991e>
- <https://git.kernel.org/stable/c/ff3f22ed8d2f350b4c24ee26e33daea5f08d58ef>
- <https://git.kernel.org/stable/c/7cf9cd98cf6f0df3befc167ca6b54c07014d71de>

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-2026-93174>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93174/>. Everything for agents: <https://agentprime.io/llms.txt>.