kernel: powerpc: local user can read vector registers of other users' processes via a Facility Unavailable exception
Published Sep 13, 2019
4.4
MEDIUMCVSS 3.1
EPSS 0.45%
Description
In the Linux kernel through 5.2.14 on the powerpc platform, a local user can read vector registers of other users' processes via a Facility Unavailable exception. To exploit the venerability, a local user starts a transaction (via the hardware transactional memory instruction tbegin) and then accesses vector registers. At some point, the vector registers will be corrupted with the values from a different local Linux process because of a missing arch/powerpc/kernel/process.c check.
Affected products
No data.
Configuration 1
- ≤ 5.2.14
Configuration 2
- 16.04
- 18.04
- 19.04
- 15.0
- 15.1
- 7.0
- 8.0
No data.
Red Hat Enterprise Linux 7
kernel-alt-0:4.14.0-115.18.1.el7a
Fixed · RHSA-2020:0740
Red Hat Enterprise Linux 8
kernel-0:4.18.0-147.8.1.el8_1
Fixed · RHSA-2020:1372
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Affected
Red Hat Enterprise MRG 2
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-alt-0:4.14.0-115.18.1.el7a | Fixed | RHSA-2020:0740 |
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-147.8.1.el8_1 | Fixed | RHSA-2020:1372 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Affected | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
When applicable rely on FPU emulation (for example by rebuilding the critical services code) instead of the hardware FPU.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:P/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.45% (0.00451) | 36.92th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.45% (0.00451) | 38.52th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00042) | 5.06th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.10% (0.01104) | 50.41th | v2 (v2022.01.01) |
| Mar 31, 2022 | 4.41% (0.04411) | 71.44th | v2 (v2022.01.01) |
| Jan 6, 2022 | 4.33% (0.04329) | 74.46th | v1 |
| Jan 5, 2022 | 1.00% (0.00999) | 63.13th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.00% (0.00999) | 0.00th | v1 |
References (12)
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/10/3 x_refsource_MISCMailing ListPatchThird Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0740 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2019-15030 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1759313 Issue Tracking
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8205d5d98ef7f155de211f5e2eb6ca03d95a5a60 x_refsource_MISCExploitMailing ListPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-15030
- https://security.netapp.com/advisory/ntap-20191004-0001/ x_refsource_CONFIRMThird Party Advisory
- https://usn.ubuntu.com/4135-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/4135-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-15030
Change history (0)
No recorded changes yet.