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Fencer Vulns
high 7.0

CVE-2019-12817 json

arch/powerpc/mm/mmu_context_book3s64.c in the Linux kernel before 5.1.15 for powerpc has a bug where unrelated processes may be able to rea…

published 2019-06-25 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-4398

cvss
7.0
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

arch/powerpc/mm/mmu_context_book3s64.c in the Linux kernel before 5.1.15 for powerpc has a bug where unrelated processes may be able to read/write to one another's virtual memory under certain conditions via an mmap above 512 TB. Only a subset of powerpc systems are affected.

Patch / fix

  • linux linux_kernel 5.1.15
  • linux Debian 14, Debian 13, Debian 12 5.2.6-1

debian advisories DEBIAN-CVE-2019-12817

  • linux-hwe Ubuntu 18.04 LTS 4.18.0-24.25~18.04.1
  • linux-hwe-edge Ubuntu 18.04 LTS 5.0.0-19.20~18.04.1

ubuntu advisories UBUNTU-CVE-2019-12817

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 RHEL 8 4.18.0-80.11.1.el8_0
  • perf RHEL 8 4.18.0-80.11.1.el8_0
  • bpftool RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-core RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-tools RHEL 8 4.18.0-80.11.1.el8_0
  • python3-perf RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-modules RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-zfcpdump RHEL 8 4.18.0-80.11.1.el8_0

red hat advisories RHSA-2019:2703

  • kernel-source-rt Real Time Module 15 SP1 4.12.14-14.8.1
  • kernel-rt Real Time Module 15 SP1 4.12.14-14.8.1
  • kernel-syms-rt Real Time Module 15 SP1 4.12.14-14.8.1
  • kernel-rt_debug Real Time Module 15 SP1 4.12.14-14.8.1
  • kernel-azure SLE Module for Public Cloud 15 SP1 4.12.14-8.13.1
  • kernel-syms-azure SLE Module for Public Cloud 15 SP1 4.12.14-8.13.1
  • kernel-source-azure SLE Module for Public Cloud 15 SP1 4.12.14-8.13.1
  • kernel-syms SLE Module for Development Tools 15 SP1 4.12.14-197.7.1

suse advisories SUSE-SU-2019:2430-1SUSE-SU-2019:2069-1SUSE-SU-2019:1769-1SUSE-SU-2019:1765-1SUSE-SU-2019:1744-1

  • kernel-syms openSUSE Leap 15.1 4.12.14-lp151.28.10.1
  • kernel-obs-qa openSUSE Leap 15.1 4.12.14-lp151.28.10.1
  • kernel-source openSUSE Leap 15.1 4.12.14-lp151.28.10.1
  • kernel-default openSUSE Leap 15.1 4.12.14-lp151.28.10.1
  • kernel-vanilla openSUSE Leap 15.1 4.12.14-lp151.28.10.1
  • kernel-kvmsmall openSUSE Leap 15.1 4.12.14-lp151.28.10.1
  • kernel-obs-build openSUSE Leap 15.1 4.12.14-lp151.28.10.1

opensuse advisories openSUSE-SU-2019:1757-1

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-2019-12817 updated cvss 7.0

kernel: ppc: unrelated processes being able to read/write to each other's virtual memory

  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-80.11.1.el8_0, kernel-debuginfo-common-aarch64 4.18.0-80.11.1.el8_0, kernel-debuginfo-common-ppc64le 4.18.0-80.11.1.el8_0 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-80.11.1.el8_0, kernel 4.18.0-80.11.1.el8_0, bpftool 4.18.0-80.11.1.el8_0, kernel-core 4.18.0-80.11.1.el8_0, kernel-tools 4.18.0-80.11.1.el8_0, python3-perf 4.18.0-80.11.1.el8_0, +15 more
    fixed: vendor fix RHSA-2019:2703
  • Red Hat Enterprise Linux 5 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 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +6 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

0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.9 AV:L/AC:M/Au:N/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.