What is CVE-2018-10878?

CVE-2018-10878 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2018-07-26.

How severe is CVE-2018-10878?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Linux Kernel

CVE-2018-10878

A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bounds write and a denial of service or unspecified other impact is possible by mounting and operating a crafted ext4 filesystem image.

Vulnerability class: Buffer Overflow

Published 2018-07-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Linux Kernel
[Unknown] Kernel
Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
Debian Linux — versions 8.0
Red Hat Enterprise Linux Desktop — versions 7.0
Red Hat Enterprise Linux Server — versions 7.0
Red Hat Enterprise Linux Workstation — versions 7.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

access.redhat.com/errata/RHSA-2018:3083 (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3753-2/ (vendor-advisory, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Issue Tracking)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
usn.ubuntu.com/3871-5/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3871-4/ (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2018/07/msg00020.html (mailing-list, Mailing List, Third Party Advisory)
access.redhat.com/errata/RHSA-2018:2948 (vendor-advisory, Third Party Advisory)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
patchwork.ozlabs.org/patch/929238/ (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2018-10878?: CVE-2018-10878 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2018-07-26.
How severe is CVE-2018-10878?: High severity. CVSS v3 base score is 7.8 out of 10.