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Fencer Vulns
high 7.8

CVE-2018-15471 json

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 thr…

published 2018-08-17 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-7349

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

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.

Patch / fix

  • linux linux_kernel 4.9.133, 4.14.76, 4.18.14
  • linux Debian 14, Debian 13, Debian 12 4.18.10-2

debian advisories DEBIAN-CVE-2018-15471

  • linux Ubuntu 18.04 LTS 4.15.0-39.42
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1027.27
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1024.25~16.04.2
  • linux-gcp Ubuntu 18.04 LTS 4.15.0-1024.25
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-39.42~16.04.1
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1026.26
  • linux-oem Ubuntu 18.04 LTS 4.15.0-1026.31
  • linux-azure Ubuntu 14.04 LTS 4.15.0-1031.32~14.04.1

ubuntu advisories UBUNTU-CVE-2018-15471

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-livepatch-SLE15_Update_3 SLE Live Patching 15 3-2.3
  • kernel-livepatch-SLE15_Update_3 SLE Live Patching 15 2-2.2
  • kernel-livepatch-SLE15_Update_0 SLE Live Patching 15 3-7.3
  • kernel-livepatch-SLE15_Update_1 SLE Live Patching 15 3-2.1
  • kernel-livepatch-SLE15_Update_2 SLE Live Patching 15 3-2.1

suse advisories SUSE-SU-2018:2935-1SUSE-SU-2018:2933-1SUSE-SU-2018:2677-1SUSE-SU-2018:2678-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-15471 updated cvss 8.2

kernel: net: xen: Linux netback driver OOB access in hash handling (XSA-270)

  • Red Hat Enterprise Linux 5 xen, kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-core, kernel-tools, python3-perf, +17 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:L/AC:L/Au:S/C:C/I:C/A:C

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.