Out-of-bounds Read in Linux Kernel
CVE-2018-1093
The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.
Vulnerability class: Buffer Overflow
EPSS: 0.020 (78.7th 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 (x_refsource_UBUNTU, vendor-advisory)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (Mailing List, x_refsource_MISC)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (vendor-advisory, x_refsource_DEBIAN)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory)
Frequently asked questions
- What is CVE-2018-1093?
- CVE-2018-1093 is a medium-severity vulnerability in Linux Kernel, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2018-04-02.
- How severe is CVE-2018-1093?
- Medium severity. CVSS v3 base score is 5.5 out of 10.