kernel: NULL pointer dereference in drivers/scsi/libsas/sas_discover.c because of mishandling of port disconnection during discovery
Published Dec 25, 2019
4.7
MEDIUMCVSS 3.1
EPSS 0.65%
Description
In the Linux kernel through 5.4.6, there is a NULL pointer dereference in drivers/scsi/libsas/sas_discover.c because of mishandling of port disconnection during discovery, related to a PHY down race condition, aka CID-f70267f379b5.
Affected products
No data.
Configuration 1
- ≤ 5.4.6
Configuration 2
- 8.0
Configuration 3
- 14.04
- 16.04
- 18.04
- 19.10
Configuration 4
- n/a
- n/a
- n/a
- ≥ 11.0.0 · ≤ 11.70.1
- n/a
- n/a
- n/a
Configuration 6
- n/a
Configuration 7
- n/a
Configuration 8
- n/a
Configuration 9
- n/a
Configuration 10
- n/a
No data.
Red Hat Enterprise Linux 5
kernel
Out of support scope
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel
Fix deferred
Red Hat Enterprise Linux 7
kernel-alt
Fix deferred
Red Hat Enterprise Linux 7
kernel-rt
Fix deferred
Red Hat Enterprise Linux 8
kernel
Fix deferred
Red Hat Enterprise Linux 8
kernel-rt
Fix deferred
Red Hat Enterprise MRG 2
kernel-rt
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Fix deferred | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Fix deferred | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
To mitigate this issue, prevent module libsas from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:M/Au:N/C:N/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 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.65% (0.00654) | 49.48th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.65% (0.00654) | 46.29th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.11% (0.00107) | 26.56th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00063) | 29.41th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.06% (0.00063) | 27.41th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00063) | 25.40th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.80% (0.04804) | 74.65th | v2 (v2022.01.01) |
| Feb 3, 2022 | 10.22% (0.10225) | 87.52th | v1 |
| Jan 6, 2022 | 10.22% (0.10225) | 87.37th | v1 |
| Sep 1, 2021 | 2.48% (0.02476) | 78.74th | v1 |
| Apr 14, 2021 | 2.48% (0.02476) | 0.00th | v1 |
References (15)
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2019-19965 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1794404 Issue Tracking
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f70267f379b5e5e11bdc5d72a56bf17e5feed01f x_refsource_MISCExploitPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-19965
- https://security.netapp.com/advisory/ntap-20200204-0002/ x_refsource_CONFIRMThird Party Advisory
- https://usn.ubuntu.com/4284-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/4285-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/4286-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/4286-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/4287-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/4287-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-19965
Change history (0)
No recorded changes yet.