Out-of-bounds Read in Linux Kernel
CVE-2018-18445
In the Linux kernel 4.14.x, 4.15.x, 4.16.x, 4.17.x, and 4.18.x before 4.18.13, faulty computation of numeric bounds in the BPF verifier permits out-of-bounds memory accesses because adjust_scalar_min_max_vals in kernel/bpf/verifier.c mishandles 32-bit right shifts.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (43.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Linux Kernel
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0, 7.6
- Red Hat Enterprise Linux Server Aus — versions 7.6
- Red Hat Enterprise Linux Server Eus — versions 7.6
- Red Hat Enterprise Linux Server Tus — versions 7.6
- Red Hat Enterprise Linux Workstation — versions 7.0
Weakness classification (CWE)
References
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.13 (Patch, Third Party Advisory, Release Notes)
- usn.ubuntu.com/3847-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3835-1/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:0512 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3847-2/ (vendor-advisory, Third Party Advisory)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.75 (Patch, Third Party Advisory, Release Notes)
- usn.ubuntu.com/3832-1/ (vendor-advisory, Third Party Advisory)
- github.com/torvalds/linux/commit/b799207e1e1816b09e7a5920fbb2d5fcf6edd681 (Patch, Third Party Advisory)
- usn.ubuntu.com/3847-3/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:0514 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-18445?
- CVE-2018-18445 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2018-10-17.
- How severe is CVE-2018-18445?
- High severity. CVSS v3 base score is 7.8 out of 10.