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Fencer Vulns
medium 5.9

CVE-2018-11412 json

In the Linux kernel 4.13 through 4.16.11, ext4_read_inline_data() in fs/ext4/inline.c performs a memcpy with an untrusted length value in c…

published 2018-05-24 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-3443

cvss
5.9
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
15.6%
EPSS 15.6% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

In the Linux kernel 4.13 through 4.16.11, ext4_read_inline_data() in fs/ext4/inline.c performs a memcpy with an untrusted length value in certain circumstances involving a crafted filesystem that stores the system.data extended attribute value in a dedicated inode.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.17.3-1

debian advisories DEBIAN-CVE-2018-11412

  • linux Ubuntu 18.04 LTS 4.15.0-33.36
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1020.20
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1018.19~16.04.2
  • linux-gcp Ubuntu 18.04 LTS 4.15.0-1018.19
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-33.36~16.04.1
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1020.20
  • linux-oem Ubuntu 18.04 LTS 4.15.0-1017.20
  • linux-azure Ubuntu 16.04 LTS 4.15.0-1022.22~16.04.1

ubuntu advisories UBUNTU-CVE-2018-11412

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-alt RHEL 7 4.14.0-115.6.1.el7a
  • perf RHEL 7 4.14.0-115.6.1.el7a
  • kernel RHEL 7 4.14.0-115.6.1.el7a
  • python-perf RHEL 7 4.14.0-115.6.1.el7a
  • kernel-tools RHEL 7 4.14.0-115.6.1.el7a
  • kernel-tools-libs RHEL 7 4.14.0-115.6.1.el7a
  • kernel-bootwrapper RHEL 7 4.14.0-115.6.1.el7a
  • kernel-abi-whitelists RHEL 7 4.14.0-115.6.1.el7a

red hat advisories RHSA-2019:0525

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-11412 updated cvss 6.8

kernel: out-of-bounds memcpy in fs/ext4/inline.c:ext4_read_inline_data() with crafted ext4 image

  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) perf 4.14.0-115.6.1.el7a, kernel 4.14.0-115.6.1.el7a, kernel-alt 4.14.0-115.6.1.el7a, python-perf 4.14.0-115.6.1.el7a, kernel-tools 4.14.0-115.6.1.el7a, kernel-tools-libs 4.14.0-115.6.1.el7a, +3 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debuginfo-common-ppc64le 4.14.0-115.6.1.el7a
    fixed: vendor fix RHSA-2019:0525
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-core, kernel-tools, python3-perf, +17 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. Published
  2. First public exploit (EDB-44832)

Exploit prediction

15.56% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-44832 Linux Kernel < 4.16.11 - 'ext4_read_inline_data()' Memory Corruption dos, 2018-06-05
  • bugs.chromium.org https://bugs.chromium.org/p/project-zero/issues/detail?id=1580 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=199803 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.