Out-of-bounds Read in Linux Kernel
CVE-2018-15471
An issue was discovered in xenvif_set_hash_mapping in drivers/net/xen-netback/hash.c in the Linux kernel through 4.18.1, as used in Xen through 4.11.x and other products. The Linux netback driver allows frontends to control mapping of requests to request queues. When processing a request to set or change this mapping, some input validation (e.g., for an integer overflow) was missing or flawed, leading to OOB access in hash handling. A malicious or buggy frontend may cause the (usually privileged) backend to make out of bounds memory accesses, potentially resulting in one or more of privilege escalation, Denial of Service (DoS), or information leaks.
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: 0.004 (26.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Linux Kernel
- Xen
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
Weakness classification (CWE)
References
- usn.ubuntu.com/3820-1/ (vendor-advisory, Third Party Advisory)
- xenbits.xen.org/xsa/advisory-270.html (Vendor Advisory)
- usn.ubuntu.com/3820-2/ (vendor-advisory, Third Party Advisory)
- bugs.chromium.org/p/project-zero/issues/detail (Third Party Advisory)
- www.debian.org/security/2018/dsa-4313 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/03/msg00017.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3819-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3820-3/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-15471?
- CVE-2018-15471 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2018-08-17.
- How severe is CVE-2018-15471?
- High severity. CVSS v3 base score is 7.8 out of 10.