# CVE-2026-45836: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb()

Status: published. Published: 2026-05-26. Updated: 2026-11-06.

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

Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb()

Add the same NULL guard already present in
l2cap_sock_resume_cb() and l2cap_sock_ready_cb().

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 8d836d71e2223b8961b21112bb4ce89ef8231682; < fd072f833147b0bc10c43a454624cb99d02f3fc7 (affected, git); ≥ 8d836d71e2223b8961b21112bb4ce89ef8231682; < 6e8d1a2a677a81caa60cf0aabd4217bd585fbba1 (affected, git); ≥ 8d836d71e2223b8961b21112bb4ce89ef8231682; < e1863e7480feddb90125d0dd5a1b572972d75908 (affected, git); ≥ 8d836d71e2223b8961b21112bb4ce89ef8231682; < cf1fd517f892ded88168df878f834b625133f86d (affected, git); ≥ 8d836d71e2223b8961b21112bb4ce89ef8231682; < 58dc5e3d8768e121907608e6e196a908512fb083 (affected, git); ≥ 8d836d71e2223b8961b21112bb4ce89ef8231682; < 32bd343803d4ba47cc516f9d5f037f01b855d767 (affected, git); ≥ 8d836d71e2223b8961b21112bb4ce89ef8231682; < a93d66907dd4d29b65c9797a93784bf61906d6d6 (affected, git); ≥ 8d836d71e2223b8961b21112bb4ce89ef8231682; < 78a88d43dab8d23aeef934ed8ce34d40e6b3d613 (affected, git). Source: CNA: Linux
- Linux / Linux: 3.13 (affected); ≥ 0; < 3.13 (unaffected, semver); ≥ 5.10.258; ≤ 5.10.* (unaffected, semver); ≥ 5.15.209; ≤ 5.15.* (unaffected, semver); ≥ 6.1.175; ≤ 6.1.* (unaffected, semver); ≥ 6.6.140; ≤ 6.6.* (unaffected, semver); ≥ 6.12.90; ≤ 6.12.* (unaffected, semver); ≥ 6.18.30; ≤ 6.18.* (unaffected, semver); ≥ 7.0.7; ≤ 7.0.* (unaffected, semver); ≥ 7.1; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux
- Siemens / SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: ≥ 0; < * (affected, custom). Source: ADP: siemens-SADP

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.13% as of 2026-11-06; percentile 2.29%

- 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/fd072f833147b0bc10c43a454624cb99d02f3fc7 (CNA: Linux)

- https://git.kernel.org/stable/c/6e8d1a2a677a81caa60cf0aabd4217bd585fbba1 (CNA: Linux)

- https://git.kernel.org/stable/c/e1863e7480feddb90125d0dd5a1b572972d75908 (CNA: Linux)

- https://git.kernel.org/stable/c/cf1fd517f892ded88168df878f834b625133f86d (CNA: Linux)

- https://git.kernel.org/stable/c/58dc5e3d8768e121907608e6e196a908512fb083 (CNA: Linux)

- https://git.kernel.org/stable/c/32bd343803d4ba47cc516f9d5f037f01b855d767 (CNA: Linux)

- https://git.kernel.org/stable/c/a93d66907dd4d29b65c9797a93784bf61906d6d6 (CNA: Linux)

- https://git.kernel.org/stable/c/78a88d43dab8d23aeef934ed8ce34d40e6b3d613 (CNA: Linux)

- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (ADP: siemens-SADP)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-45836; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-45836; retrieved 2026-11-06; source updated Not reported

Revision: b6cbe88754ec992490a59f9efde5979d2d587d0ccfa7cc4214b4f759a7e48eab

Canonical: https://y2.dev/cve/CVE-2026-45836

## 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.