Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.2.6-1 | — |
| Debian 13 | linux | 5.2.6-1 | — |
| Debian 12 | linux | 5.2.6-1 | — |
| Debian 10 | linux | 4.19.37-5+deb10u2 | DSA-4495-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-hwe | 4.18.0-24.25~18.04.1 | USN-4031-1 |
| Ubuntu 18.04 LTS | linux-hwe-edge | 5.0.0-19.20~18.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | perf +28 | 4.18.0-80.11.1.el8_0 | RHSA-2019:2703 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.13.1 | SUSE-SU-2019:2069-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.7.1 | SUSE-SU-2019:1744-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.7.1 | SUSE-SU-2019:1744-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_0 | 3-7.2 | SUSE-SU-2019:1765-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_1 | 2-2.1 | SUSE-SU-2019:1769-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_2 | 1-3.3.1 | SUSE-SU-2019:1744-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.8.1 | SUSE-SU-2019:2430-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.10.1 | openSUSE-SU-2019:1757-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-80.11.1.el8_0 | ELSA-2019-2703 |
Advisories 10
- RHSA-2019:2703 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-4495-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-4031-1 linux, linux-hwe vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2019:1769-1 Security update for the Linux Kernel (Live Patch 1 for SLE 15 SP1) SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1757-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2069-1 Security update for the Linux Kernel for Azure SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1744-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2430-1 Security update for kernel-source-rt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1765-1 Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP1) SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2019-2703 Important: kernel security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 12, 2019
References
- USN-4031-1 vendor-advisory
- [oss-security] 20190625 CVE-2019-12817: Linux kernel: powerpc: Unrelated processes may be able to read/write to each other's virtual memory mailing-list
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca72d88378b2f2444d3ec145dd442d449d3fefbc
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.15
- 108884 vdb-entry
- FEDORA-2019-6817686c4d vendor-advisory
- FEDORA-2019-69c132b061 vendor-advisory
- openSUSE-SU-2019:1757 vendor-advisory
- DSA-4495 vendor-advisory
- 20190812 [SECURITY] [DSA 4495-1] linux security update mailing-list
- https://support.f5.com/csp/article/K12876166
- RHSA-2019:2703 vendor-advisory
- https://support.f5.com/csp/article/K12876166?utm_source=f5support&%3Butm_medium=RSS