CVE-2018-1095

MEDIUM

Linux Kernel < 4.15.15 - Denial of Service via ext4 Xattr Size Validation

Title source: llm
STIX 2.1

Description

The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image.

References (7)

Core 7
Core References
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3695-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3695-2/
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:2948
Exploit, Issue Tracking x_refsource_misc
https://bugzilla.kernel.org/show_bug.cgi?id=199185
Issue Tracking x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1560793

Scores

CVSS v3 5.5
EPSS 0.0146
EPSS Percentile 70.2%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (1)
linux/linux_kernel < 4.15.15
Published Apr 02, 2018
Tracked Since Feb 18, 2026