Threats / Linux / CVE-2013-2596
CVE-2013-2596
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Linux Kernel vulnerability
An integer overflow in the Linux kernel's fb_mmap function allows local attackers to achieve privilege escalation through the framebuffer device driver.
Verdict
Today item — known-exploited.
Local attackers can exploit an integer overflow in framebuffer memory mapping to escalate privileges. The vulnerability has been observed in active exploitation. Affected systems running vulnerable Linux kernel versions require immediate patching.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
1 independent public report of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-09-15).
Probability (EPSS)
EPSS 0.03373 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Linux, Kernel. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-189 CWE-189.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
WeaknessCWE-189 · CWE-189
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious framebuffer mmap request that triggers an integer overflow in fb_mmap, bypassing size validation checks.
Business
An unprivileged user gains kernel-level code execution on the system.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I use the overflow to map kernel memory regions into my process address space, gaining read and write access to privileged data structures.
Business
System security boundaries are compromised, enabling full system compromise from a low-privilege account.
3
Lateral reach — past segmentation narrative 3
Attacker
I modify kernel structures to escalate my process privileges to root or execute arbitrary kernel code.
Business
The attacker achieves complete system control, enabling data theft, malware installation, or lateral movement within the infrastructure.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05