# CVE-2020-29369: Race condition in n/a

> A race condition in the Linux kernel memory management allows local attackers to potentially escalate privileges or execute code.

- **Severity:** High 7.0 (`CVSS:3.1/AV:L/AC:H/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:** 28 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2020-29369, GHSA-rp7p-r22g-55vr, SUSE-SU-2020:3843-1, UBUNTU-CVE-2020-29369

## What is CVE-2020-29369?

CVE-2020-29369 is a high-severity vulnerability in Linux kernel, published on 28 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.

Weakness: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2020-29369?

It affects 5 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `kernel-livepatch-SLE15-SP2_Update_0` | SUSE:Linux Enterprise Live Patching 15 SP2 | All versions | 6-5.2 |

Products: Linux kernel, Netapp Hci Compute Node, Netapp Hci Management Node, Netapp Hci Storage Node, Netapp Solidfire.

## How do I fix CVE-2020-29369?

Apply the vendor's patch.

## Is CVE-2020-29369 being exploited?

There is no known exploitation of CVE-2020-29369 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-29369 and fix it if it is affected.

What it is: CVE-2020-29369 is a high-severity vulnerability in Linux kernel, published on 28 Nov 2020. 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-2020-29369 in the wild and no public exploit code.

Affected product: Linux kernel. 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-2020-29369/ (Markdown: https://insights.sbomify.com/CVE-2020-29369/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-29369
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-29369
- OSV: https://osv.dev/vulnerability/CVE-2020-29369

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-29369/
Summaries are generated and may contain mistakes; the official description above is the record.