# CVE-2020-11655: Null dereference in n/a

> Attackers can cause a denial of service via segmentation fault in SQLite by submitting malformed window-function queries due to improper object initialization.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Apr 2020
- **Updated:** 14 Oct 2026
- **Also known as:** ALPINE-CVE-2020-11655, AZL-39034, BIT-sqlite-2020-11655, CLEANSTART-2026-XM25172, DEBIAN-CVE-2020-11655, DLA-2203-1, GHSA-f86q-8q37-c2x4, UBUNTU-CVE-2020-11655

## What is CVE-2020-11655?

CVE-2020-11655 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 9 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SQLite through 3.31.1 allows attackers to cause a denial of service (segmentation fault) via a malformed window-function query because the AggInfo object's initialization is mishandled.

Weakness: CWE-665 (Improper Initialization)

## Which versions are affected by CVE-2020-11655?

1 open source package ship an affected version, including sqlite. It affects 18 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `sqlite` | Bitnami | All versions | 3.31.2 |

Products: Canonical Ubuntu Linux, Debian Debian Linux, Netapp Ontap Select Deploy Administration Utility, Oracle Communications Element Manager, Oracle Communications Messaging Server, Oracle Communications Network Charging and Control, Oracle Communications Session Report Manager, Oracle Communications Session Route Manager, Oracle Enterprise Manager Ops Center, Oracle Hyperion Infrastructure Technology, Oracle Instantis Enterprisetrack, Oracle Mysql, Oracle Mysql Workbench, Oracle Outside in Technology, Oracle Zfs Storage Appliance Kit, Siemens Sinec Infrastructure Network Services, Sqlite Sqlite, Tenable Tenable.sc.

## How do I fix CVE-2020-11655?

Upgrade sqlite to 3.31.2 or later.

## Is CVE-2020-11655 being exploited?

There is no known exploitation of CVE-2020-11655 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-2020-11655 and fix it if it is affected.

What it is: CVE-2020-11655 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 9 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-11655 in the wild and no public exploit code.

Affected packages and fixed versions:
- sqlite (Bitnami): affected all versions; fixed in 3.31.2

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-2020-11655/ (Markdown: https://insights.sbomify.com/CVE-2020-11655/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-11655
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-11655
- OSV: https://osv.dev/vulnerability/CVE-2020-11655

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-11655/
Summaries are generated and may contain mistakes; the official description above is the record.