CVE-2018-14634KEV · OVERDUECWE-190

Linux Kernel Integer Overflow Vulnerability

High · published September 25, 2018

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.8. It is confirmed in active exploitation. It sits in the 96.7th percentile for exploit probability.

249
days past CISA
deadline
CVSS v3.0
7.8
EPSS
15%
Percentile
96.7
In the wild
Confirmed
What it is

⚡ An integer overflow in the Linux kernel opens the door for unprivileged local users to boost their privileges like surprise guests at a party who quickly become the life of the event! 🎉 Think of this flaw as a miscalculated recipe where adding too many ingredients makes the dish overflow and spill into places it shouldn’t. In this case, the kernel’s privilege system becomes a bit too generous, allowing unauthorized users to gain access they shouldn’t have. If exploited, this vulnerability could allow a local user to escalate their privileges, enabling them to execute arbitrary code and potentially gain full control over the system. Imagine someone turning a simple dinner invitation into a takeover of the entire house party—chaos could ensue!

Put simply

Think of this flaw as a miscalculated recipe where adding too many ingredients makes the dish overflow and spill into places it shouldn’t. In this case, the kernel’s privilege system becomes a bit too generous, allowing unauthorized users to gain access they shouldn’t have. The vulnerability arises from an integer overflow in the Linux kernel's create_elf_tables() function, allowing unprivileged users with access to SUID binaries to manipulate the system and escalate their privileges.

What to do

If exploited, this vulnerability could allow a local user to escalate their privileges, enabling them to execute arbitrary code and potentially gain full control over the system. Imagine someone turning a simple dinner invitation into a takeover of the entire house party—chaos could ensue! To mitigate this risk, immediately update your kernel to the latest patched version that is free from this vulnerability. Ensure that you review all SUID binaries for potential exposure and limit access to trusted users only. Make sure to apply this fix as soon as possible—your system's safety depends on it! You can handle this! With a few updates and careful management, you'll have your system secured in no time. 🛡️

The record
Technical detail
CVSS v3.0
7.8 · HIGH
Vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.14689 · 96.7th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2018-09-25T21:00Z
KEV added
2026-01-26 · due 2026-02-16
EPSS history
Timeline
  • 26 JAN 00:00Z
    Added to CISA KEV — remediate by Feb 16
    kev
  • 25 SEP 21:00Z
    An integer overflow flaw was found in the Linux kernel's create_elf_tables() function
    cvelistv5