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Fencer Vulns
high 8.1

CVE-2020-28374 json

In drivers/target/target_core_xcopy.c in the Linux kernel before 5.10.7, insufficient identifier checking in the LIO SCSI target code can b…

published 2021-01-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20833

cvss
8.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.6%
EPSS 6.6% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

In drivers/target/target_core_xcopy.c in the Linux kernel before 5.10.7, insufficient identifier checking in the LIO SCSI target code can be used by remote attackers to read or write files via directory traversal in an XCOPY request, aka CID-2896c93811e3. For example, an attack can occur over a network if the attacker has access to one iSCSI LUN. The attacker gains control over file access because I/O operations are proxied via an attacker-selected backstore.

Patch / fix

  • linux linux_kernel 5.10.7
  • linux Debian 14, Debian 13, Debian 12 5.10.9-1

debian advisories DEBIAN-CVE-2020-28374

  • linux Ubuntu 16.04 LTS 4.4.0-200.232
  • linux Ubuntu 18.04 LTS 4.15.0-132.136
  • linux Ubuntu 20.04 LTS 5.4.0-62.70
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1121.135
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1093.99
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1037.39
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1092.105~16.04.1
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1036.39

ubuntu advisories UBUNTU-CVE-2020-28374

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 7 3.10.0-1160.21.1.el7
  • perf RHEL 7 3.10.0-1160.21.1.el7
  • bpftool RHEL 7 3.10.0-1160.21.1.el7
  • python-perf RHEL 7 3.10.0-1160.21.1.el7
  • kernel-kdump RHEL 7 3.10.0-1160.21.1.el7
  • kernel-tools RHEL 7 3.10.0-1160.21.1.el7
  • kernel-tools-libs RHEL 7 3.10.0-1160.21.1.el7
  • kernel-bootwrapper RHEL 7 3.10.0-1160.21.1.el7

red hat advisories RHSA-2021:2106RHSA-2021:2099RHSA-2021:0856RHSA-2021:0857RHSA-2021:1093RHSA-2021:1081

  • kgraft-patch-SLE12-SP2_Update_36 SLES for SAP 12 SP2, SLES 12 SP2-LTSS, OpenStack Cloud 7 7-2.2
  • kernel-syms SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +1 more 4.4.121-92.152.2
  • kernel-source SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +1 more 4.4.121-92.152.2
  • kernel-default SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.152.2
  • kgraft-patch-SLE12-SP2_Update_40 SLES for SAP 12 SP2, SLES 12 SP2-LTSS, OpenStack Cloud 7 1-3.3.2
  • kernel-syms SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +3 more 4.4.180-94.141.2
  • kernel-source SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +3 more 4.4.180-94.141.2
  • kernel-default SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +4 more 4.4.180-94.141.2

suse advisories SUSE-SU-2021:0868-1SUSE-SU-2021:0853-1SUSE-SU-2021:0859-1SUSE-SU-2021:0818-1SUSE-SU-2021:0849-1SUSE-SU-2021:0842-1

  • kernel-syms openSUSE Leap 15.1 4.12.14-lp151.28.91.1
  • kernel-obs-qa openSUSE Leap 15.1 4.12.14-lp151.28.91.1
  • kernel-source openSUSE Leap 15.1 4.12.14-lp151.28.91.1
  • kernel-default openSUSE Leap 15.1 4.12.14-lp151.28.91.1
  • kernel-vanilla openSUSE Leap 15.1 4.12.14-lp151.28.91.1
  • kernel-kvmsmall openSUSE Leap 15.1 4.12.14-lp151.28.91.1
  • kernel-obs-build openSUSE Leap 15.1 4.12.14-lp151.28.91.1
  • kernel-syms openSUSE Leap 15.2 5.3.18-lp152.60.1

opensuse advisories openSUSE-SU-2021:0075-1openSUSE-SU-2021:0060-1

  • kernel-abi-whitelists AlmaLinux 8 4.18.0-240.22.1.el8_3

almalinux advisories ALSA-2021:1093

  • linux Arch Linux 5.10.7.arch1-1
  • linux-hardened Arch Linux 5.10.7.a-1
  • linux-zen Arch Linux 5.10.7.zen1-1
  • linux-lts Arch Linux 5.4.89-1

arch linux advisories AVG-1442AVG-1443AVG-1444AVG-1445

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-2020-28374 updated cvss 8.1

kernel: SCSI target (LIO) write to any block on ILO backstore

  • Red Hat Enterprise Linux 7 perf, kernel, kernel-alt, python-perf, kernel-kdump, kernel-tools, +3 more
    affected: no fix available
  • Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    affected: no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-240.22.1.el8_3, kernel-debuginfo-common-aarch64 4.18.0-240.22.1.el8_3, kernel-debuginfo-common-ppc64le 4.18.0-240.22.1.el8_3
    fixed: vendor fix RHSA-2021:1093
  • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-debuginfo-common-x86_64 4.18.0-147.48.1.el8_1, kernel-debuginfo-common-aarch64 4.18.0-147.48.1.el8_1, kernel-debuginfo-common-ppc64le 4.18.0-147.48.1.el8_1
    fixed: vendor fix RHSA-2021:2106
  • Red Hat CodeReady Linux Builder EUS (v. 8.2) kernel-debuginfo-common-x86_64 4.18.0-193.56.1.el8_2, kernel-debuginfo-common-aarch64 4.18.0-193.56.1.el8_2, kernel-debuginfo-common-ppc64le 4.18.0-193.56.1.el8_2
    fixed: vendor fix RHSA-2021:2185
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-240.22.1.el8_3, kernel 4.18.0-240.22.1.el8_3, bpftool 4.18.0-240.22.1.el8_3, kernel-core 4.18.0-240.22.1.el8_3, kernel-tools 4.18.0-240.22.1.el8_3, python3-perf 4.18.0-240.22.1.el8_3, +15 more
    fixed: vendor fix RHSA-2021:1093
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) perf 4.18.0-147.48.1.el8_1, kernel 4.18.0-147.48.1.el8_1, bpftool 4.18.0-147.48.1.el8_1, kernel-core 4.18.0-147.48.1.el8_1, kernel-tools 4.18.0-147.48.1.el8_1, python3-perf 4.18.0-147.48.1.el8_1, +23 more
    fixed: vendor fix RHSA-2021:2106
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) perf 4.18.0-193.56.1.el8_2, kernel 4.18.0-193.56.1.el8_2, bpftool 4.18.0-193.56.1.el8_2, kernel-core 4.18.0-193.56.1.el8_2, kernel-tools 4.18.0-193.56.1.el8_2, python3-perf 4.18.0-193.56.1.el8_2, +27 more
    fixed: vendor fix RHSA-2021:2185
show 23 more
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1160.21.1.el7, kernel 3.10.0-1160.21.1.el7, bpftool 3.10.0-1160.21.1.el7, python-perf 3.10.0-1160.21.1.el7, kernel-tools 3.10.0-1160.21.1.el7, kernel-tools-libs 3.10.0-1160.21.1.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.21.1.el7
    fixed: vendor fix RHSA-2021:0856
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) perf 3.10.0-957.72.1.el7, kernel 3.10.0-957.72.1.el7, bpftool 3.10.0-957.72.1.el7, python-perf 3.10.0-957.72.1.el7, kernel-tools 3.10.0-957.72.1.el7, kernel-tools-libs 3.10.0-957.72.1.el7, +2 more
    fixed: vendor fix RHSA-2021:1376
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) perf 3.10.0-1062.49.1.el7, kernel 3.10.0-1062.49.1.el7, bpftool 3.10.0-1062.49.1.el7, python-perf 3.10.0-1062.49.1.el7, kernel-tools 3.10.0-1062.49.1.el7, kernel-tools-libs 3.10.0-1062.49.1.el7, +2 more
    fixed: vendor fix RHSA-2021:1531
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.21.1.el7
    fixed: vendor fix RHSA-2021:0856
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.72.1.el7
    fixed: vendor fix RHSA-2021:1376
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-debuginfo-common-x86_64 3.10.0-1062.49.1.el7
    fixed: vendor fix RHSA-2021:1531
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-trace 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.21.1.rt56.1158.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-kvm 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-trace 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debug-kvm 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-trace-kvm 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.21.1.rt56.1158.el7
    fixed: vendor fix RHSA-2021:0857
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-core 4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-modules 4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-debug-core 4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-debug-modules 4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-modules-extra 4.18.0-240.22.1.rt7.77.el8_3, +2 more
    fixed: vendor fix RHSA-2021:1081
  • Red Hat Enterprise Linux Real Time EUS (v. 8.2) kernel-rt 4.18.0-193.56.1.rt13.106.el8_2, kernel-rt-core 4.18.0-193.56.1.rt13.106.el8_2, kernel-rt-modules 4.18.0-193.56.1.rt13.106.el8_2, kernel-rt-debug-core 4.18.0-193.56.1.rt13.106.el8_2, kernel-rt-debug-modules 4.18.0-193.56.1.rt13.106.el8_2, kernel-rt-modules-extra 4.18.0-193.56.1.rt13.106.el8_2, +2 more
    fixed: vendor fix RHSA-2021:2190
  • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-kvm 4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-core 4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-modules 4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-debug-kvm 4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-debug-core 4.18.0-240.22.1.rt7.77.el8_3, +4 more
    fixed: vendor fix RHSA-2021:1081
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) kernel-rt 4.18.0-193.56.1.rt13.106.el8_2, kernel-rt-kvm 4.18.0-193.56.1.rt13.106.el8_2, kernel-rt-core 4.18.0-193.56.1.rt13.106.el8_2, kernel-rt-modules 4.18.0-193.56.1.rt13.106.el8_2, kernel-rt-debug-kvm 4.18.0-193.56.1.rt13.106.el8_2, kernel-rt-debug-core 4.18.0-193.56.1.rt13.106.el8_2, +4 more
    fixed: vendor fix RHSA-2021:2190
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1160.21.1.el7, kernel 3.10.0-1160.21.1.el7, bpftool 3.10.0-1160.21.1.el7, kpatch-patch-3_10_0-1160 1-3.el7, python-perf 3.10.0-1160.21.1.el7, kernel-kdump 3.10.0-1160.21.1.el7, +13 more
    fixed: vendor fix RHSA-2021:0856
  • Red Hat Enterprise Linux Server AUS (v. 7.4) perf 3.10.0-693.90.2.el7, kernel 3.10.0-693.90.2.el7, python-perf 3.10.0-693.90.2.el7, kernel-tools 3.10.0-693.90.2.el7, kernel-tools-libs 3.10.0-693.90.2.el7, kernel-abi-whitelists 3.10.0-693.90.2.el7, +1 more Red Hat Enterprise Linux Server E4S (v. 7.4) perf 3.10.0-693.90.2.el7, kernel 3.10.0-693.90.2.el7, python-perf 3.10.0-693.90.2.el7, kernel-tools 3.10.0-693.90.2.el7, kernel-tools-libs 3.10.0-693.90.2.el7, kernel-bootwrapper 3.10.0-693.90.2.el7, +3 more
    fixed: vendor fix RHSA-2021:2732
  • Red Hat Enterprise Linux Server EUS (v. 7.6) perf 3.10.0-957.72.1.el7, kernel 3.10.0-957.72.1.el7, bpftool 3.10.0-957.72.1.el7, python-perf 3.10.0-957.72.1.el7, kernel-kdump 3.10.0-957.72.1.el7, kernel-tools 3.10.0-957.72.1.el7, +16 more
    fixed: vendor fix RHSA-2021:1376
  • Red Hat Enterprise Linux Server EUS (v. 7.7) perf 3.10.0-1062.49.1.el7, kernel 3.10.0-1062.49.1.el7, bpftool 3.10.0-1062.49.1.el7, python-perf 3.10.0-1062.49.1.el7, kernel-kdump 3.10.0-1062.49.1.el7, kernel-tools 3.10.0-1062.49.1.el7, +18 more
    fixed: vendor fix RHSA-2021:1531
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1160.21.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.21.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.21.1.el7
    fixed: vendor fix RHSA-2021:0856
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.90.2.el7 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.90.2.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.90.2.el7
    fixed: vendor fix RHSA-2021:2732
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debuginfo-common-ppc64 3.10.0-957.72.1.el7, kernel-debuginfo-common-x86_64 3.10.0-957.72.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.72.1.el7
    fixed: vendor fix RHSA-2021:1376
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debuginfo-common-ppc64 3.10.0-1062.49.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1062.49.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1062.49.1.el7
    fixed: vendor fix RHSA-2021:1531
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.90.2.el7 Red Hat Enterprise Linux Server TUS (v. 7.4) perf 3.10.0-693.90.2.el7, kernel 3.10.0-693.90.2.el7, python-perf 3.10.0-693.90.2.el7, kernel-tools 3.10.0-693.90.2.el7, kernel-tools-libs 3.10.0-693.90.2.el7, kernel-abi-whitelists 3.10.0-693.90.2.el7, +1 more
    fixed: vendor fix RHSA-2021:2732
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1160.21.1.el7, kernel 3.10.0-1160.21.1.el7, bpftool 3.10.0-1160.21.1.el7, python-perf 3.10.0-1160.21.1.el7, kernel-tools 3.10.0-1160.21.1.el7, kernel-tools-libs 3.10.0-1160.21.1.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.21.1.el7
    fixed: vendor fix RHSA-2021:0856
  • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS perf 3.10.0-957.72.1.el7, python-perf 3.10.0-957.72.1.el7
    fixed: vendor fix RHSA-2021:1376
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    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

6.64% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD 2.0 5.5 AV:N/AC:L/Au:S/C:P/I:P/A:N

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory
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.