---
id: "CVE-2013-2596"
kind: "vulnerability"
aliases: ["CVE-2013-2596"]
title: "Integer overflow in the fb_mmap function in drivers/video/fbmem.c in the Linux kernel before 3.8.9, as used in a\u2026"
severity: "high"
cvss: 7.8
epss: 0.03212
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "linux kernel", "fixed": ["3.0.75"], "affected": ">= 2.6.12, < 3.0.75", "ecosystem": "vendor"}, {"name": "linux kernel", "fixed": ["3.2.45"], "affected": ">= 3.1, < 3.2.45", "ecosystem": "vendor"}, {"name": "linux kernel", "fixed": ["3.4.42"], "affected": ">= 3.3, < 3.4.42", "ecosystem": "vendor"}, {"name": "linux kernel", "fixed": ["3.8.9"], "affected": ">= 3.5, < 3.8.9", "ecosystem": "vendor"}, {"name": "motorola android", "fixed": [], "affected": "= 4.1.2", "ecosystem": "vendor"}, {"name": "Linux Kernel", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "kernel", "linux", "self-hosted"]
not_affected_if: ["unknown"]
published_at: "2013-04-13T02:59:46+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-24T00:09:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2013-2596", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2013-2596", "first_seen_at": "2026-10-23T19:13:45+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2013-2596", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# Integer overflow in the fb_mmap function in drivers/video/fbmem.c in the Linux kernel before 3.8.9, as used in a…

The Linux kernel's fb_mmap function in drivers/video/fbmem.c has an integer overflow. A local user can use it to gain root privileges.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:linux kernel affected >= 2.6.12, < 3.0.75 fixed 3.0.75
- vendor:linux kernel affected >= 3.1, < 3.2.45 fixed 3.2.45
- vendor:linux kernel affected >= 3.3, < 3.4.42 fixed 3.4.42
- vendor:linux kernel affected >= 3.5, < 3.8.9 fixed 3.8.9
- vendor:motorola android affected = 4.1.2 fixed ?
- vendor:Linux Kernel affected ? fixed ?

## Fix

Update the Linux kernel to a release that includes the upstream fix for CVE-2013-2596, per your distribution's vendor instructions.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2013-2596
- 2026-10-23T19:13:45+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2013-2596
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2013-2596

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_