7.2

CVE-2012-2136: linux linux_kernel Improper Input Validation

Modified
AliasesRHSA-2012:0690RHSA-2012:1087UBUNTU-CVE-2012-2136
Published 09-08-2012Last modified 06-08-2024

Vulnerability summary

CVE-2012-2136 is a high (CVSS 7.2) Improper Input Validation vulnerability in linux linux_kernel. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 46.6% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (GitHub, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
7.2/10
010
High · v2.0 (NVD)
EPSS score
0.56%
0%100%
Low · -0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1
RHSA-2012:0743

Timeline

  1. 09-08-2012
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The sock_alloc_send_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, which allows local users to cause a denial of service (heap-based buffer overflow and system crash) or possibly gain privileges by leveraging access to a TUN/TAP device.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

0.56%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

Decrease -0.02 pp

From 0.58% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Linux

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication (CVSS vector). Other conditions: not stated in public data.

Redhat18 products
  • kernel< 0:2.6.18-308.8.1.el5 | < 0:2.6.18-238.40.1.el5
  • kernel-debug< 0:2.6.18-308.8.1.el5 | < 0:2.6.18-238.40.1.el5
  • kernel-debug-debuginfo< 0:2.6.18-308.8.1.el5 | < 0:2.6.18-238.40.1.el5
  • kernel-debug-devel< 0:2.6.18-308.8.1.el5 | < 0:2.6.18-238.40.1.el5
  • kernel-debuginfo< 0:2.6.18-308.8.1.el5 | < 0:2.6.18-238.40.1.el5
Ubuntu12 products
  • linux< 3.11.0-12.19 | < 4.2.0-16.19
  • linux-aws< 4.4.0-1002.2 | < 4.4.0-1001.10
  • linux-gke< 4.4.0-1003.3
  • linux-goldfish< 3.4.0-4.27
  • linux-hwe< 4.8.0-36.36~16.04.1
Debian1 product
  • linux< 3.2.20-1
Linux1 product

4 vendors · 32 products

References

34 links
Show all 34 references