# CVE-2013-2596: Linux Kernel Integer Overflow

> Local attackers can exploit an integer overflow in the Linux kernel framebuffer driver to map kernel memory and gain elevated privileges.

- **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:** Yes, since 15 Sep 2022 (CISA KEV)
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Apr 2013
- **Updated:** 22 Oct 2025
- **Also known as:** DEBIAN-CVE-2013-2596, GHSA-xg37-4cgv-wc3c, UBUNTU-CVE-2013-2596

## What is CVE-2013-2596?

CVE-2013-2596 is a high-severity vulnerability in Linux kernel, published on 13 Apr 2013. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Integer overflow in the fb_mmap function in drivers/video/fbmem.c in the Linux kernel before 3.8.9, as used in a certain Motorola build of Android 4.1.2 and other products, allows local users to create a read-write memory mapping for the entirety of kernel memory, and consequently gain privileges, via crafted /dev/graphics/fb0 mmap2 system calls, as demonstrated by the Motochopper pwn program.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2013-2596?

It affects 2 products.


Products: Linux kernel, Motorola Android.

## How do I fix CVE-2013-2596?

Apply the vendor's patch. US federal agencies must fix it by 6 Oct 2022.

## Is CVE-2013-2596 being exploited?

Yes. Attackers have exploited CVE-2013-2596 in the wild since at least 15 Sep 2022.

Public exploit code:

- CVE-2013-2596 exploit for android (github_poc): https://github.com/hiikezoe/libfb_mem_exploit

## 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-2013-2596 and fix it if it is affected.

What it is: CVE-2013-2596 is a high-severity vulnerability in Linux kernel, published on 13 Apr 2013. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2013-2596 in the wild since at least 15 Sep 2022.

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-2013-2596/ (Markdown: https://insights.sbomify.com/CVE-2013-2596/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-2596
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-2596
- OSV: https://osv.dev/vulnerability/CVE-2013-2596

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From sbomify Insights: https://insights.sbomify.com/CVE-2013-2596/
Summaries are generated and may contain mistakes; the official description above is the record.