CVE-2013-2596

Exp

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.

Published: 2013-04-13 Last update: 2026-04-21 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-2596 is rated Critical Active Threat (86.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.37%). CISA KEV confirms active exploitation (added 2022-09-15) affecting Linux / Kernel. a weakness (CWE-190) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2013-2596

Name: Linux Kernel Integer Overflow Vulnerability · CISA KEV detail

Exploit added: 2022-09-15

Action due: 2022-10-06

Required action: Apply updates per vendor instructions.

Public exploit references (Exploit-DB) for CVE-2013-2596

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-2596

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 3.13% 3.37% +0.24%
2 2026-04-22 2.70% 3.13% +0.43%
3 2026-02-10 — 2.70% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-2596

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
6.9 2.0 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.4 10.0 [email protected]

Weakness enumeration for CVE-2013-2596

OS Trackers for CVE-2013-2596

vendor priority summary link
debian not yet assigned CVE-2013-2596 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-2596
redhat high — https://access.redhat.com/security/cve/CVE-2013-2596
ubuntu low CVE-2013-2596 low priority: Ubuntu including 41 source packages (linux, linux-aws, …), 278 status rows across 7 suites (bionic, eoan, focal, groovy, trusty, upstream, xenial): DNE 159, not-affected 68, released 41, ignored 10. https://ubuntu.com/security/CVE-2013-2596

Affected software / configurations for CVE-2013-2596

Vendor Product Version Raw CPE
linux linux_kernel >= 2.6.12, < 3.0.75 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.1, < 3.2.45 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.3, < 3.4.42 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.5, < 3.8.9 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
motorola android 4.1.2 cpe:2.3:o:motorola:android:4.1.2:*:*:*:*:*:*:*

References for CVE-2013-2596

URL Tags
http://forum.xda-developers.com/showthread.php?t=2255491 Exploit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b4cbb197c7e7a68dbad0d491242e3ca67420c13e Broken Link
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fc9bbca8f650e5f738af8806317c0a041a48ae4a Broken Link
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761 Third Party Advisory
http://marc.info/?l=linux-kernel&m=136616837923938&w=2 Mailing List Patch Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-0695.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-0782.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-0803.html Third Party Advisory
http://www.droid-life.com/2013/04/09/root-method-released-for-droid-razr-hd-running-android-4-1-2-other-devices-too/ Exploit Issue Tracking Third Party Advisory
http://www.droidrzr.com/index.php/topic/15208-root-motochopper-yet-another-android-root-exploit/ Exploit Issue Tracking
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.9 Mailing List Release Notes
http://www.mandriva.com/security/advisories?name=MDVSA-2013:176 Broken Link
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html Patch Third Party Advisory
http://www.securityfocus.com/bid/59264 Broken Link Third Party Advisory VDB Entry
https://github.com/torvalds/linux/commit/b4cbb197c7e7a68dbad0d491242e3ca67420c13e Patch
https://github.com/torvalds/linux/commit/fc9bbca8f650e5f738af8806317c0a041a48ae4a Exploit Patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-2596 US Government Resource
cvelogic Threat Intelligence