# CVE-2017-15868: Privilege escalation in n/a

> Local attackers can gain privileges via a crafted application due to missing socket availability checks in the Linux kernel Bluetooth subsystem.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 5 Dec 2017
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-15868, GHSA-6qcf-qpfw-q4v6, SUSE-SU-2018:0243-1, SUSE-SU-2018:0267-1, UBUNTU-CVE-2017-15868

## What is CVE-2017-15868?

CVE-2017-15868 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 5 Dec 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The bnep_add_connection function in net/bluetooth/bnep/core.c in the Linux kernel before 3.19 does not ensure that an l2cap socket is available, which allows local users to gain privileges via a crafted application.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2017-15868?

It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `kgraft-patch-SLE12-SP1_Update_23` | SUSE:Linux Enterprise Server 12 SP1-LTSS | All versions | 2-2.1 |
| `kgraft-patch-SLE12_Update_29` | SUSE:Linux Enterprise Server 12-LTSS | All versions | 3-2.1 |
| `kgraft-patch-SLE12-SP1_Update_23` | SUSE:Linux Enterprise Server for SAP Applications 12 SP1 | All versions | 2-2.1 |

Products: Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.

## How do I fix CVE-2017-15868?

Apply the vendor's patch.

## Is CVE-2017-15868 being exploited?

There is no known exploitation of CVE-2017-15868 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-15868 and fix it if it is affected.

What it is: CVE-2017-15868 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 5 Dec 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-15868 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2017-15868/ (Markdown: https://insights.sbomify.com/CVE-2017-15868/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-15868
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-15868
- OSV: https://osv.dev/vulnerability/CVE-2017-15868

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-15868/
Summaries are generated and may contain mistakes; the official description above is the record.