# CVE-2022-49048: ipv6: fix panic when forwarding a pkt with no in6 dev

> A null pointer dereference in the Linux kernel IPv6 forwarding path allows attackers to cause a system crash via crafted packets.

- **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:** 26 Feb 2025
- **Updated:** 15 Oct 2026
- **Also known as:** DEBIAN-CVE-2022-49048, GHSA-hv5h-q6gh-5q7w, UBUNTU-CVE-2022-49048

## What is CVE-2022-49048?

CVE-2022-49048 is a high-severity vulnerability in Linux kernel, published on 26 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In the Linux kernel, the following vulnerability has been resolved:

ipv6: fix panic when forwarding a pkt with no in6 dev

kongweibin reported a kernel panic in ip6_forward() when input interface
has no in6 dev associated.

The following tc commands were used to reproduce this panic:
tc qdisc del dev vxlan100 root
tc qdisc add dev vxlan100 root netem corrupt 5%

## Which versions are affected by CVE-2022-49048?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2022-49048?

Apply the vendor's patch.

## Is CVE-2022-49048 being exploited?

There is no known exploitation of CVE-2022-49048 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-2022-49048 and fix it if it is affected.

What it is: CVE-2022-49048 is a high-severity vulnerability in Linux kernel, published on 26 Feb 2025. 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-2022-49048 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-2022-49048/ (Markdown: https://insights.sbomify.com/CVE-2022-49048/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-49048
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-49048
- OSV: https://osv.dev/vulnerability/CVE-2022-49048

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-49048/
Summaries are generated and may contain mistakes; the official description above is the record.