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High · 7.8 CVE-2021-47159 EUVD-2021-33807GHSA-5c7w-v73j-6cr4

net: dsa: fix a crash if ->get_sset_count() fails

Published Mar 25, 2024 · Updated Aug 5, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.4 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-fips Package: linux-aws-hwe Package: linux-azure Package: linux-azure-4.15 Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.4 Package: linux-azure-5.8 Package: linux-azure-6.2 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-4.15 Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.4 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.19 Package: linux-hwe-5.4 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-edge Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-kvm Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-nvidia-6.2 Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.3 Package: linux-oracle-5.4 Package: linux-oracle-5.8 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-vmware Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

In the Linux kernel, the following vulnerability has been resolved:

net: dsa: fix a crash if ->get_sset_count() fails

If ds->ops->get_sset_count() fails then it "count" is a negative error
code such as -EOPNOTSUPP. Because "i" is an unsigned int, the negative
error code is type promoted to a very high value and the loop will
corrupt memory until the system crashes.

Fix this by checking for error codes and changing the type of "i" to
just int.

Affected products

VendorProductAffectedFixed
Linux Linux 4.7 4.19.193

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.

ReleasePackageFixed inAdvisory
Debian 14 linux 5.14.6-1 —
Debian 13 linux 5.14.6-1 —
Debian 12 linux 5.14.6-1 —
ReleasePackageFixed inAdvisory
Ubuntu 24.04 LTS linux-raspi-realtime No fix yet —
Ubuntu 22.04 LTS linux-riscv +22 No fix yet —
Ubuntu 20.04 LTS linux 5.4.0-80.90 —
Ubuntu 20.04 LTS linux-aws 5.4.0-1054.57 —
Ubuntu 20.04 LTS linux-azure 5.4.0-1055.57 —
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1016.19 —
Ubuntu 20.04 LTS linux-gcp 5.4.0-1049.53 —
Ubuntu 20.04 LTS linux-gke +26 No fix yet —
Ubuntu 20.04 LTS linux-gkeop 5.4.0-1021.22 —
Ubuntu 20.04 LTS linux-kvm 5.4.0-1044.46 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1052.56 —
Ubuntu 20.04 LTS linux-raspi 5.4.0-1041.45 —
Ubuntu 18.04 LTS linux 4.15.0-151.157 —
Ubuntu 18.04 LTS linux-aws 4.15.0-1109.116 —
Ubuntu 18.04 LTS linux-aws-5.4 5.4.0-1054.57~18.04.1 —
Ubuntu 18.04 LTS linux-azure-4.15 4.15.0-1121.134 —
Ubuntu 18.04 LTS linux-azure-5.4 5.4.0-1055.57~18.04.1 —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 18.04 LTS linux-gcp-4.15 4.15.0-1106.120 —
Ubuntu 18.04 LTS linux-gcp-5.4 5.4.0-1049.53~18.04.1 —
Ubuntu 18.04 LTS linux-hwe-5.4 5.4.0-80.90~18.04.1 —
Ubuntu 18.04 LTS linux-kvm 4.15.0-1097.99 —
Ubuntu 18.04 LTS linux-oracle 4.15.0-1078.86 —
Ubuntu 18.04 LTS linux-oracle-5.4 5.4.0-1052.56~18.04.1 —
Ubuntu 18.04 LTS linux-raspi-5.4 5.4.0-1041.45~18.04.1 —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Show 6 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 18.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1069.73+fips2 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1073.76+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1031.36 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1067.71~20.04.1 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-aws-fips 4.15.0-2051.53 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-azure-fips 4.15.0-2033.37 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-fips 4.15.0-1066.75 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-gcp-fips 4.15.0-2016.18 —
Ubuntu Pro 16.04 LTS linux-aws-hwe 4.15.0-1109.116~16.04.1 —
Ubuntu Pro 16.04 LTS linux-azure 4.15.0-1121.134~16.04.1 —
Ubuntu Pro 16.04 LTS linux-gcp 4.15.0-1106.120~16.04.1 —
Ubuntu Pro 16.04 LTS linux-hwe 4.15.0-151.157~16.04.1 —
Ubuntu Pro 16.04 LTS linux-oracle 4.15.0-1078.86~16.04.1 —
Ubuntu Pro 14.04 LTS linux-azure 4.15.0-1121.134~14.04.1 —
ReleasePackageFixed inAdvisory
SLES 12 SP5 kernel-azure +2 4.12.14-16.182.1 SUSE-SU-2024:1643-1
SLES 12 SP5 kernel-docs +4 4.12.14-122.216.1 SUSE-SU-2024:1870-1
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 12 SP5 kernel-azure +2 4.12.14-16.182.1 SUSE-SU-2024:1643-1
SLES for SAP 12 SP5 kernel-syms +2 4.12.14-122.216.1 SUSE-SU-2024:1870-1
SLE Real Time 12 SP5 kernel-rt +3 4.12.14-10.182.1 SUSE-SU-2024:1646-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.216.1 SUSE-SU-2024:1870-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_56 1-8.3.1 SUSE-SU-2024:1870-1

Advisories 4

References