# CVE-2026-80591: f2fs: fix listxattr handling of corrupted xattr entries

> A flaw in the Linux kernel's f2fs filesystem allows attackers to cause a denial of service by triggering improper handling of corrupted extended attribute entries.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/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 Aug 2026
- **Updated:** 29 Aug 2026
- **Also known as:** BELL-CVE-2026-80591, DEBIAN-CVE-2026-80591, GHSA-4pj6-ggmx-ccvm, UBUNTU-CVE-2026-80591

## What is CVE-2026-80591?

CVE-2026-80591 is a high-severity denial of service vulnerability in Linux, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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

f2fs: fix listxattr handling of corrupted xattr entries

Validate the xattr entry before reading its fields in f2fs_listxattr().
Return -EFSCORRUPTED when the entry is outside the valid xattr storage
area instead of returning a successful partial result.

## Which versions are affected by CVE-2026-80591?


## How do I fix CVE-2026-80591?

Apply the vendor's patch.

## Is CVE-2026-80591 being exploited?

There is no known exploitation of CVE-2026-80591 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-80591 and fix it if it is affected.

What it is: CVE-2026-80591 is a high-severity denial of service vulnerability in Linux, published on 28 Aug 2026. 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-2026-80591 in the wild and no public exploit code.

Affected product: 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-2026-80591/ (Markdown: https://insights.sbomify.com/CVE-2026-80591/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-80591
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-80591
- OSV: https://osv.dev/vulnerability/CVE-2026-80591

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-80591/
Summaries are generated and may contain mistakes; the official description above is the record.