NULL pointer dereference in Linux Kernel
CVE-2018-1095
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.
EPSS: 0.015 (70.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Linux Linux_kernel
- N/a Linux Kernel Through Version 4.15 — versions Linux kernel through version 4.15
Weakness classification (CWE)
References
- secalert@redhat.com (Patch, x_refsource_MISC)
- secalert@redhat.com (Mailing List, x_refsource_MISC)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (Exploit, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2018-1095?
- CVE-2018-1095 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2018-04-02.
- How severe is CVE-2018-1095?
- Medium severity. CVSS v3 base score is 5.5 out of 10.