# ALBA-2021:1731: userspace-rcu bug fix and enhancement update

> An unspecified flaw in the userspace-rcu subsystem of AlmaLinux has been fixed; AlmaLinux administrators should apply the update.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not stated
- **Attackable:** Not stated
- **Victim action needed:** Not stated
- **Harmful if only installed:** No
- **Needs a specific call:** No
- **Fix available:** Yes
- **Published:** 18 May 2021

## What is ALBA-2021:1731?

ALBA-2021:1731 is an other vulnerability in userspace-rcu, published on 18 May 2021. 

### Official description

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

## Which versions are affected by ALBA-2021:1731?

An affected version is exposed as installed. No special setting or call is needed.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `userspace-rcu` | AlmaLinux:8 | All versions | 0.10.1-4.el8 |
| `userspace-rcu-devel` | AlmaLinux:8 | All versions | 0.10.1-4.el8 |

## How do I fix ALBA-2021:1731?

Upgrade to a fixed version.

## Is ALBA-2021:1731 being exploited?

There is no known exploitation of ALBA-2021:1731 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for ALBA-2021:1731 and fix it if it is affected.

What it is: ALBA-2021:1731 is an other vulnerability in userspace-rcu, published on 18 May 2021. 
Exploitation: There is no known exploitation of ALBA-2021:1731 in the wild and no public exploit code.
Exposure: An affected version is exposed as installed. No special setting or call is needed.

Affected product: userspace-rcu. 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/ALBA-2021-1731/ (Markdown: https://insights.sbomify.com/ALBA-2021-1731/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/ALBA-2021:1731

---
From sbomify Insights: https://insights.sbomify.com/ALBA-2021-1731/
Summaries are generated and may contain mistakes; the official description above is the record.