# CVE-2022-3435: Linux Kernel IPv4 fib_semantics.c fib_nh_match out-of-bounds

> A remote attacker can trigger an out-of-bounds read in the Linux Kernel IPv4 handler, potentially disclosing sensitive memory contents.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 8 Oct 2022
- **Updated:** 15 Apr 2025
- **Also known as:** DEBIAN-CVE-2022-3435, GHSA-hcgg-5q2q-c9qf, UBUNTU-CVE-2022-3435

## What is CVE-2022-3435?

CVE-2022-3435 is a medium-severity vulnerability in Debian Debian Linux, published on 8 Oct 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability classified as problematic has been found in Linux Kernel. This affects the function fib_nh_match of the file net/ipv4/fib_semantics.c of the component IPv4 Handler. The manipulation leads to out-of-bounds read. It is possible to initiate the attack remotely. It is recommended to apply a patch to fix this issue. The identifier VDB-210357 was assigned to this vulnerability.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2022-3435?

It affects 3 products.


Products: Debian Debian Linux, Fedoraproject Fedora, Linux kernel.

## How do I fix CVE-2022-3435?

Apply the vendor's patch.

## Is CVE-2022-3435 being exploited?

There is no known exploitation of CVE-2022-3435 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-3435 and fix it if it is affected.

What it is: CVE-2022-3435 is a medium-severity vulnerability in Debian Debian Linux, published on 8 Oct 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-3435 in the wild and no public exploit code.

Affected product: Debian Debian 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-2022-3435/ (Markdown: https://insights.sbomify.com/CVE-2022-3435/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-3435
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-3435
- OSV: https://osv.dev/vulnerability/CVE-2022-3435

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-3435/
Summaries are generated and may contain mistakes; the official description above is the record.