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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.019 (79.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.019 · change: -0.000
Affected products
- Linux Kernel
- Linux Kernel Through Version 4.15 — versions Linux kernel through version 4.15
Weakness classification (CWE)
References
- usn.ubuntu.com/3752-2/ (vendor-advisory)
- usn.ubuntu.com/3676-1/ (vendor-advisory)
- lists.debian.org/debian-lts-announce/2018/07/msg00015.html (mailing-list)
- openwall.com/lists/oss-security/2018/03/29/1 (Mailing List)
- usn.ubuntu.com/3752-3/ (vendor-advisory)
- lists.debian.org/debian-lts-announce/2018/07/msg00016.html (mailing-list)
- lists.debian.org/debian-lts-announce/2018/06/msg00000.html (mailing-list)
- bugzilla.kernel.org/show_bug.cgi (Issue Tracking)
- www.debian.org/security/2018/dsa-4188 (vendor-advisory)
- usn.ubuntu.com/3754-1/ (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.