CVE-2020-12770 json
An issue was discovered in the Linux kernel through 5.6.11.
published 2020-05-09 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-5055
- cvss
- 6.7
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
An issue was discovered in the Linux kernel through 5.6.11. sg_write lacks an sg_remove_request call in a certain failure case, aka CID-83c6f2390040.
Patch / fix
- linux Debian 14, Debian 13, Debian 12 5.6.14-1
debian advisories DEBIAN-CVE-2020-12770
- linux Ubuntu 16.04 LTS 4.4.0-185.215
- linux Ubuntu 18.04 LTS 4.15.0-109.110
- linux Ubuntu 20.04 LTS 5.4.0-40.44
- linux-aws Ubuntu 16.04 LTS 4.4.0-1110.121
- linux-aws Ubuntu 18.04 LTS 4.15.0-1077.81
- linux-aws Ubuntu 20.04 LTS 5.4.0-1018.18
- linux-gcp Ubuntu 16.04 LTS 4.15.0-1078.88~16.04.1
- linux-gcp Ubuntu 20.04 LTS 5.4.0-1019.19
ubuntu advisories UBUNTU-CVE-2020-12770
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 4.18.0-240.el8
- perf RHEL 8 4.18.0-240.el8
- bpftool RHEL 8 4.18.0-240.el8
- kernel-core RHEL 8 4.18.0-240.el8
- kernel-tools RHEL 8 4.18.0-240.el8
- python3-perf RHEL 8 4.18.0-240.el8
- kernel-modules RHEL 8 4.18.0-240.el8
- kernel-zfcpdump RHEL 8 4.18.0-240.el8
red hat advisories RHSA-2020:4431RHSA-2020:4060RHSA-2020:4609RHSA-2020:4062RHSA-2020:5656RHSA-2020:5206
- kernel-rt SLE Micro 5.5 5.14.21-150500.13.82.1
- kernel-source-rt SLE Micro 5.5 5.14.21-150500.13.82.1
- kernel-syms SLES for SAP 12 SP4, SLES 12 SP4-LTSS, OpenStack Cloud Crowbar 9 +1 more 4.12.14-95.83.2
- kernel-source SLES for SAP 12 SP4, SLES 12 SP4-LTSS, OpenStack Cloud Crowbar 9 +1 more 4.12.14-95.83.2
- kernel-default SLES for SAP 12 SP4, SLES 12 SP4-LTSS, SLE Live Patching 12 SP4 +3 more 4.12.14-95.83.2
- kernel-syms SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.78.1
- kernel-source SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.78.1
- kernel-default SLES for SAP 15, SLES 15-LTSS, SLE Live Patching 15 +3 more 4.12.14-150.78.1
suse advisories SUSE-SU-2025:0229-1SUSE-SU-2022:14905-1SUSE-SU-2021:3972-1SUSE-SU-2021:3969-1SUSE-SU-2021:3876-1SUSE-SU-2021:3415-1
- kernel-default openSUSE Leap 15.3 4.12.14-197.102.2
- kernel-vanilla openSUSE Leap 15.3 4.12.14-197.102.2
- kernel-kvmsmall openSUSE Leap 15.3 4.12.14-197.102.2
- kernel-zfcpdump openSUSE Leap 15.3 4.12.14-197.102.2
- dtb-aarch64 openSUSE Leap 15.3 5.3.18-59.24.1
- kernel-64kb openSUSE Leap 15.3 5.3.18-59.24.1
- kernel-syms openSUSE Leap 15.3 5.3.18-59.24.1
- kernel-obs-qa openSUSE Leap 15.3 5.3.18-59.24.1
opensuse advisories openSUSE-SU-2021:3876-1openSUSE-SU-2021:3205-1openSUSE-SU-2021:3179-1
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-2020-12770 updated cvss 6.7
kernel: sg_write function lacks an sg_remove_request call in a certain failure case
-
Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 moreaffected: workaround, no fix planned “Out of support scope”
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Red Hat Enterprise Linux 7 perf, kernel, kernel-alt, python-perf, kernel-kdump, kernel-tools, +3 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmwareaffected: workaround, no fix planned “Will not fix”
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Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-240.el8, kernel-debuginfo-common-aarch64 4.18.0-240.el8, kernel-debuginfo-common-ppc64le 4.18.0-240.el8 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-240.el8, kernel 4.18.0-240.el8, bpftool 4.18.0-240.el8, kernel-core 4.18.0-240.el8, kernel-tools 4.18.0-240.el8, python3-perf 4.18.0-240.el8, +15 morefixed: vendor fix RHSA-2020:4431
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Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, kernel-tools-libs 3.10.0-1160.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, kernel-tools-libs 3.10.0-1160.el7, +2 morefixed: vendor fix RHSA-2020:4060
-
Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) perf 3.10.0-957.65.1.el7, kernel 3.10.0-957.65.1.el7, bpftool 3.10.0-957.65.1.el7, python-perf 3.10.0-957.65.1.el7, kernel-tools 3.10.0-957.65.1.el7, kernel-tools-libs 3.10.0-957.65.1.el7, +2 morefixed: vendor fix RHSA-2020:5656
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Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) perf 3.10.0-1062.40.1.el7, kernel 3.10.0-1062.40.1.el7, bpftool 3.10.0-1062.40.1.el7, python-perf 3.10.0-1062.40.1.el7, kernel-tools 3.10.0-1062.40.1.el7, kernel-tools-libs 3.10.0-1062.40.1.el7, +2 morefixed: vendor fix RHSA-2020:5206
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Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.el7fixed: vendor fix RHSA-2020:4060
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Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.65.1.el7fixed: vendor fix RHSA-2020:5656
show 15 moreshow fewer
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Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-debuginfo-common-x86_64 3.10.0-1062.40.1.el7fixed: vendor fix RHSA-2020:5206
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Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1160.rt56.1131.el7, kernel-rt-trace 3.10.0-1160.rt56.1131.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.rt56.1131.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1160.rt56.1131.el7, kernel-rt-kvm 3.10.0-1160.rt56.1131.el7, kernel-rt-trace 3.10.0-1160.rt56.1131.el7, kernel-rt-debug-kvm 3.10.0-1160.rt56.1131.el7, kernel-rt-trace-kvm 3.10.0-1160.rt56.1131.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.rt56.1131.el7fixed: vendor fix RHSA-2020:4062
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Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-240.rt7.54.el8, kernel-rt-core 4.18.0-240.rt7.54.el8, kernel-rt-modules 4.18.0-240.rt7.54.el8, kernel-rt-debug-core 4.18.0-240.rt7.54.el8, kernel-rt-debug-modules 4.18.0-240.rt7.54.el8, kernel-rt-modules-extra 4.18.0-240.rt7.54.el8, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-240.rt7.54.el8, kernel-rt-kvm 4.18.0-240.rt7.54.el8, kernel-rt-core 4.18.0-240.rt7.54.el8, kernel-rt-modules 4.18.0-240.rt7.54.el8, kernel-rt-debug-kvm 4.18.0-240.rt7.54.el8, kernel-rt-debug-core 4.18.0-240.rt7.54.el8, +4 morefixed: vendor fix RHSA-2020:4609
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Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-kdump 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, +7 morefixed: vendor fix RHSA-2020:4060
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Red Hat Enterprise Linux Server AUS (v. 7.4) perf 3.10.0-693.81.1.el7, kernel 3.10.0-693.81.1.el7, python-perf 3.10.0-693.81.1.el7, kernel-tools 3.10.0-693.81.1.el7, kernel-tools-libs 3.10.0-693.81.1.el7, kernel-abi-whitelists 3.10.0-693.81.1.el7, +1 more Red Hat Enterprise Linux Server E4S (v. 7.4) perf 3.10.0-693.81.1.el7, kernel 3.10.0-693.81.1.el7, python-perf 3.10.0-693.81.1.el7, kernel-tools 3.10.0-693.81.1.el7, kernel-tools-libs 3.10.0-693.81.1.el7, kernel-bootwrapper 3.10.0-693.81.1.el7, +3 morefixed: vendor fix RHSA-2020:5430
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Red Hat Enterprise Linux Server EUS (v. 7.6) perf 3.10.0-957.65.1.el7, kernel 3.10.0-957.65.1.el7, bpftool 3.10.0-957.65.1.el7, python-perf 3.10.0-957.65.1.el7, kernel-kdump 3.10.0-957.65.1.el7, kernel-tools 3.10.0-957.65.1.el7, +7 morefixed: vendor fix RHSA-2020:5656
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Red Hat Enterprise Linux Server EUS (v. 7.7) perf 3.10.0-1062.40.1.el7, kernel 3.10.0-1062.40.1.el7, bpftool 3.10.0-1062.40.1.el7, python-perf 3.10.0-1062.40.1.el7, kernel-kdump 3.10.0-1062.40.1.el7, kernel-tools 3.10.0-1062.40.1.el7, +7 morefixed: vendor fix RHSA-2020:5206
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Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1160.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.el7fixed: vendor fix RHSA-2020:4060
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Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.81.1.el7 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.81.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.81.1.el7fixed: vendor fix RHSA-2020:5430
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Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debuginfo-common-ppc64 3.10.0-957.65.1.el7, kernel-debuginfo-common-x86_64 3.10.0-957.65.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.65.1.el7fixed: vendor fix RHSA-2020:5656
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Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debuginfo-common-ppc64 3.10.0-1062.40.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1062.40.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1062.40.1.el7fixed: vendor fix RHSA-2020:5206
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Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.81.1.el7 Red Hat Enterprise Linux Server TUS (v. 7.4) perf 3.10.0-693.81.1.el7, kernel 3.10.0-693.81.1.el7, python-perf 3.10.0-693.81.1.el7, kernel-tools 3.10.0-693.81.1.el7, kernel-tools-libs 3.10.0-693.81.1.el7, kernel-abi-whitelists 3.10.0-693.81.1.el7, +1 morefixed: vendor fix RHSA-2020:5430
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Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, kernel-tools-libs 3.10.0-1160.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.el7fixed: vendor fix RHSA-2020:4060
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Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS perf 3.10.0-957.65.1.el7, python-perf 3.10.0-957.65.1.el7fixed: vendor fix RHSA-2020:5656
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Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) kernel-headers 3.10.0-1062.40.1.el7 Red Hat Enterprise Linux Server AUS (v. 7.4) kernel-headers 3.10.0-693.81.1.el7 Red Hat Enterprise Linux Server E4S (v. 7.4) kernel-headers 3.10.0-693.81.1.el7 Red Hat Enterprise Linux Server EUS (v. 7.7) kernel-headers 3.10.0-1062.40.1.el7 Red Hat Enterprise Linux Server TUS (v. 7.4) kernel-headers 3.10.0-693.81.1.el7not 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
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.7 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Technology feeds
References
-
git.kernel.org
/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=83c6f2390040f188cc25b270b4befeb5628c1aee
mailing-list, patch
-
lkml.org
/lkml/2020/4/13/870
mailing-list, patch, third-party-advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/R54VC7B6MDYKP57AWC2HN7AUJYH62RKI/
vendor-advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/ES5C6ZCMALBEBMKNNCTBSLLSYGFZG3FF/
vendor-advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/IO5XIQSRI747P4RVVTNX7TUPEOCF4OPU/
vendor-advisory
-
debian.org
/security/2020/dsa-4698
vendor-advisory, third-party-advisory
-
debian.org
/security/2020/dsa-4699
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/4413-1/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/4411-1/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/4412-1/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/4419-1/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/4414-1/
vendor-advisory, third-party-advisory
-
security.netapp.com
/advisory/ntap-20200608-0001/
third-party-advisory
-
lists.debian.org
/debian-lts-announce/2020/06/msg00011.html
mailing-list, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2020/06/msg00012.html
mailing-list, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2020/06/msg00013.html
mailing-list, third-party-advisory
Sources
- CVE List CVE-2020-12770
- NVD CVE-2020-12770
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.