# CVE-2026-45834: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_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_state_change_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: ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc; < 1b1c0da227bf63479bac9982fc8d12df9aaea0fb (affected, git); ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc; < 85426e97dc72f2088ba6d27e74cd58c3fbd43e31 (affected, git); ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc; < 0c17c8832562b2aac288e89cefd0f46074f54bcb (affected, git); ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc; < 5105f3e6b2df619c635b5f6a49fac131a36c7952 (affected, git); ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc; < c88c185ae0a1067823661b220aeea613df2c127b (affected, git); ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc; < 1810e42ff6716f320c7269d5850eca48b07b7427 (affected, git); ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc; < a2dcf1a61d056aef15b63c6eae9441344d624389 (affected, git); ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc; < 2ff1a41a912de8517b4482e946dd951b7d80edbf (affected, git). Source: CNA: Linux
- Linux / Linux: 3.1 (affected); ≥ 0; < 3.1 (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); ≥ 6.12.88; ≤ 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/1b1c0da227bf63479bac9982fc8d12df9aaea0fb (CNA: Linux)

- https://git.kernel.org/stable/c/85426e97dc72f2088ba6d27e74cd58c3fbd43e31 (CNA: Linux)

- https://git.kernel.org/stable/c/0c17c8832562b2aac288e89cefd0f46074f54bcb (CNA: Linux)

- https://git.kernel.org/stable/c/5105f3e6b2df619c635b5f6a49fac131a36c7952 (CNA: Linux)

- https://git.kernel.org/stable/c/c88c185ae0a1067823661b220aeea613df2c127b (CNA: Linux)

- https://git.kernel.org/stable/c/1810e42ff6716f320c7269d5850eca48b07b7427 (CNA: Linux)

- https://git.kernel.org/stable/c/a2dcf1a61d056aef15b63c6eae9441344d624389 (CNA: Linux)

- https://git.kernel.org/stable/c/2ff1a41a912de8517b4482e946dd951b7d80edbf (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-2026-45834; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-45834; retrieved 2026-11-06; source updated Not reported

Revision: fd52c083ba4b82677d97abf3ac206dd1bd83a0c4292c82ac55bba5daa8411a17

Canonical: https://y2.dev/cve/CVE-2026-45834

## 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.