Linux · Kernel
CVE-2013-2596
Linux Kernel Integer Overflow Vulnerability
What it is
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.
CISA: Linux kernel fb_mmap function in drivers/video/fbmem.c contains an integer overflow vulnerability that allows for privilege escalation.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: October 6, 2022
- Added to the CISA list
- September 15, 2022
- Published
- April 13, 2013
- Severity
- High 7.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 3.2% in the top 11.9% of all known vulnerabilities
- Weakness
- CWE-189
- More details
- NVD · CVE.org · CISA
All references (16)
- http://rhn.redhat.com/errata/RHSA-2015-0695.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:176
- http://rhn.redhat.com/errata/RHSA-2015-0803.html
- http://rhn.redhat.com/errata/RHSA-2015-0782.html
- http://www.securityfocus.com/bid/59264
- http://www.droid-life.com/2013/04/09/root-method-released-for-droid-razr-hd-running-android-4-1-2-other-devic…
- http://marc.info/?l=linux-kernel&m=136616837923938&w=2
- https://github.com/torvalds/linux/commit/b4cbb197c7e7a68dbad0d491242e3ca67420c13e
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b4cbb197c7e7a68dbad0d491242e3…
- http://forum.xda-developers.com/showthread.php?t=2255491
- http://www.droidrzr.com/index.php/topic/15208-root-motochopper-yet-another-android-root-exploit/
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.9
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
- https://github.com/torvalds/linux/commit/fc9bbca8f650e5f738af8806317c0a041a48ae4a
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fc9bbca8f650e5f738af8806317c0…
More exploited flaws from Linux
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Sep 18, 2026 | Improper Check for Unusual or Exceptional Conditions | Kernel | Critical 9.8 | 3.3% |
| Sep 18, 2026 | Race Condition | Kernel | High 7.8 | 1.6% |
| Sep 18, 2026 | Out-of-Bounds Write | Kernel | High 8.8 | 0.9% |
| Aug 27, 2026 | Unspecified | Kernel | High 7.8 | 0.7% |
| Aug 26, 2026 | Out-of-Bounds Write | Kernel | High 7.8 | 8.9% |
| Jun 2, 2026 | Improper Authentication | Kernel | High 7.8 | 5.5% |
| May 1, 2026 | Incorrect Resource Transfer Between Spheres | Kernel | High 7.8 | 98% |
| Jan 26, 2026 | Integer Overflow | Kernel | High 7.8 | 15% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.