{"id":"CVE-2013-2596","published":"2013-04-13T02:59:46Z","modified":"2026-06-16T23:53:41Z","title":"Linux Kernel Integer Overflow Vulnerability","vendor":"Linux","product":"Kernel","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"The Linux kernel's fb_mmap function in drivers/video/fbmem.c (before 3.8.9, including a Motorola build of Android 4.1.2) contains an integer overflow flaw. A local attacker with low privileges and no user interaction can craft mmap2 system calls against /dev/graphics/fb0 to obtain a read-write mapping of the entire kernel memory space, which allows privilege escalation.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:11:51Z"},"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.03212,"percentile":0.88135,"date":"2026-10-28","provenance":"source"},"kev":{"dateAdded":"2022-09-15","dueDate":"2022-10-06","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fc9bbca8f650e5f738af8806317c0a041a48ae4a; https://nvd.nist.gov/vuln/detail/CVE-2013-2596","provenance":"source"},"vulncheckKev":{"dateAdded":"2022-09-15","exploitedFirstSeen":"2022-09-15","ransomware":false,"evidence":[{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-09-15"}],"evidenceTotal":1,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"},{"id":"CWE-189","name":null}],"references":[{"url":"http://forum.xda-developers.com/showthread.php?t=2255491","tags":["Exploit"]},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b4cbb197c7e7a68dbad0d491242e3ca67420c13e","tags":["Broken Link"]},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fc9bbca8f650e5f738af8806317c0a041a48ae4a","tags":["Broken Link"]},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761","tags":["Third Party Advisory"]},{"url":"http://marc.info/?l=linux-kernel&m=136616837923938&w=2","tags":["Mailing List","Patch","Third Party Advisory"]},{"url":"http://rhn.redhat.com/errata/RHSA-2015-0695.html","tags":["Third Party Advisory"]},{"url":"http://rhn.redhat.com/errata/RHSA-2015-0782.html","tags":["Third Party Advisory"]},{"url":"http://rhn.redhat.com/errata/RHSA-2015-0803.html","tags":["Third Party Advisory"]},{"url":"http://www.droid-life.com/2013/04/09/root-method-released-for-droid-razr-hd-running-android-4-1-2-other-devices-too/","tags":["Exploit","Issue Tracking","Third Party Advisory"]},{"url":"http://www.droidrzr.com/index.php/topic/15208-root-motochopper-yet-another-android-root-exploit/","tags":["Exploit","Issue Tracking"]},{"url":"http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.9","tags":["Mailing List","Release Notes"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2013:176","tags":["Broken Link"]},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html","tags":["Patch","Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/59264","tags":["Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://github.com/torvalds/linux/commit/b4cbb197c7e7a68dbad0d491242e3ca67420c13e","tags":["Patch"]},{"url":"https://github.com/torvalds/linux/commit/fc9bbca8f650e5f738af8806317c0a041a48ae4a","tags":["Exploit","Patch"]},{"url":"http://forum.xda-developers.com/showthread.php?t=2255491","tags":["Exploit"]},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b4cbb197c7e7a68dbad0d491242e3ca67420c13e","tags":["Broken Link"]},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fc9bbca8f650e5f738af8806317c0a041a48ae4a","tags":["Broken Link"]},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761","tags":["Third Party Advisory"]},{"url":"http://marc.info/?l=linux-kernel&m=136616837923938&w=2","tags":["Mailing List","Patch","Third Party Advisory"]},{"url":"http://rhn.redhat.com/errata/RHSA-2015-0695.html","tags":["Third Party Advisory"]},{"url":"http://rhn.redhat.com/errata/RHSA-2015-0782.html","tags":["Third Party Advisory"]},{"url":"http://rhn.redhat.com/errata/RHSA-2015-0803.html","tags":["Third Party Advisory"]},{"url":"http://www.droid-life.com/2013/04/09/root-method-released-for-droid-razr-hd-running-android-4-1-2-other-devices-too/","tags":["Exploit","Issue Tracking","Third Party Advisory"]},{"url":"http://www.droidrzr.com/index.php/topic/15208-root-motochopper-yet-another-android-root-exploit/","tags":["Exploit","Issue Tracking"]},{"url":"http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.9","tags":["Mailing List","Release Notes"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2013:176","tags":["Broken Link"]},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html","tags":["Patch","Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/59264","tags":["Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://github.com/torvalds/linux/commit/b4cbb197c7e7a68dbad0d491242e3ca67420c13e","tags":["Patch"]},{"url":"https://github.com/torvalds/linux/commit/fc9bbca8f650e5f738af8806317c0a041a48ae4a","tags":["Exploit","Patch"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-2596","tags":["US Government Resource"]}],"techniques":[{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: local user exploits kernel bug for privilege escalation","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows local users to create a read-write memory mapping for the entirety of kernel memory","start":173,"end":263}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2013-2538","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-2538","exploited":true,"exploitedSince":"2022-09-15","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2013-07-16","earliestUrl":"https://github.com/hiikezoe/libfb_mem_exploit","repos":[{"name":"hiikezoe/libfb_mem_exploit","url":"https://github.com/hiikezoe/libfb_mem_exploit","stars":6,"created":"2013-07-16"}]},"first":{"date":"2013-07-16","source":"PoC-in-GitHub","url":"https://github.com/hiikezoe/libfb_mem_exploit"},"provenance":"source"},"exploitRefs":["http://forum.xda-developers.com/showthread.php?t=2255491","http://www.droid-life.com/2013/04/09/root-method-released-for-droid-razr-hd-running-android-4-1-2-other-devices-too/","http://www.droidrzr.com/index.php/topic/15208-root-motochopper-yet-another-android-root-exploit/","https://github.com/torvalds/linux/commit/fc9bbca8f650e5f738af8806317c0a041a48ae4a"],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"}],"timeline":[{"date":"2013-04-13","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2013-2596","provenance":"source"},{"date":"2013-07-16","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/hiikezoe/libfb_mem_exploit","provenance":"source"},{"date":"2022-09-15","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","provenance":"source"},{"date":"2022-09-15","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-09-15","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-2538","provenance":"source"}],"speed":{"daysToPublicExploit":94,"firstExploitFrom":"PoC-in-GitHub","daysToKev":3442},"priority":{"score":66.1,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1505 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":17.63,"detail":"percentile 0.8813"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"4 NVD references tagged Exploit; 1 PoC-in-GitHub repo"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":5.46,"detail":"base score 7.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-linux-kernel-cwe-190"}}