# CVE-2026-31543: crash_dump: don't log dm-crypt key bytes in read_key_from_user_keying

Status: published. Published: 2026-04-24. Updated: 2026-11-05.

In the Linux kernel, the following vulnerability has been resolved:

crash_dump: don't log dm-crypt key bytes in read_key_from_user_keying

When debug logging is enabled, read_key_from_user_keying() logs the first
8 bytes of the key payload and partially exposes the dm-crypt key.  Stop
logging any key bytes.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 479e58549b0fa7e80f1e0b9e69e0a2a8e6711132; < 4897bd307ba8757c31a3325ba6730961be606016 (affected, git); ≥ 479e58549b0fa7e80f1e0b9e69e0a2a8e6711132; < ed8d91f469845d62d44c565a55d2ab1767969357 (affected, git); ≥ 479e58549b0fa7e80f1e0b9e69e0a2a8e6711132; < 36f46b0e36892eba08978eef7502ff3c94ddba77 (affected, git). Source: CNA: Linux
- Linux / Linux: 6.16 (affected); ≥ 0; < 6.16 (unaffected, semver); ≥ 6.18.20; ≤ 6.18.* (unaffected, semver); ≥ 6.19.10; ≤ 6.19.* (unaffected, semver); ≥ 7.0; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.12% as of 2026-11-05; percentile 1.90%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/4897bd307ba8757c31a3325ba6730961be606016 (CNA: Linux)

- https://git.kernel.org/stable/c/ed8d91f469845d62d44c565a55d2ab1767969357 (CNA: Linux)

- https://git.kernel.org/stable/c/36f46b0e36892eba08978eef7502ff3c94ddba77 (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-31543; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-31543; retrieved 2026-11-05; source updated Not reported

Revision: 99a7e0d20e893c5e80d2b848afcc1e692faefb108b2c764b94f8e1f1caa4487b

Canonical: https://y2.dev/cve/CVE-2026-31543

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.