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OpenAdvisories
High · 7.8 CVE-2021-47669 EUVD-2021-34678GHSA-677p-h2hj-9j82

can: vxcan: vxcan_xmit: fix use after free bug

Published Apr 17, 2025 · 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-6.5 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-6.5 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-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-6.5 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-5.15 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-6.5 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-lowlatency-hwe-6.5 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 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-oem-6.5 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-oracle-6.5 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-riscv-6.5 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

can: vxcan: vxcan_xmit: fix use after free bug

After calling netif_rx_ni(skb), dereferencing skb is unsafe.
Especially, the canfd_frame cfd which aliases skb memory is accessed
after the netif_rx_ni().

Affected products

VendorProductAffectedFixed
Linux Linux 4.12 4.14.218

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.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 linux 5.10.12-1 —
Debian 13 linux 5.10.12-1 —
Debian 12 linux 5.10.12-1 —

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 24.04 LTS linux-realtime +1 No fix yet —
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 20.04 LTS linux 5.4.0-67.75 —
Ubuntu 20.04 LTS linux-aws 5.4.0-1039.41 —
Ubuntu 20.04 LTS linux-azure 5.4.0-1041.43 —
Ubuntu 20.04 LTS linux-gcp 5.4.0-1038.41 —
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 20.04 LTS linux-kvm 5.4.0-1034.35 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1039.42 —
Ubuntu 20.04 LTS linux-raspi 5.4.0-1030.33 —
Ubuntu 18.04 LTS linux 4.15.0-141.145 —
Ubuntu 18.04 LTS linux-aws 4.15.0-1098.105 —
Ubuntu 18.04 LTS linux-aws-5.4 5.4.0-1039.41~18.04.1 —
Ubuntu 18.04 LTS linux-azure-4.15 4.15.0-1112.125 —
Ubuntu 18.04 LTS linux-azure-5.4 5.4.0-1041.43~18.04.1 —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 18.04 LTS linux-gcp-4.15 4.15.0-1097.110 —
Ubuntu 18.04 LTS linux-gcp-5.4 5.4.0-1038.41~18.04.1 —
Ubuntu 18.04 LTS linux-hwe-5.4 5.4.0-67.75~18.04.1 —
Ubuntu 18.04 LTS linux-kvm 4.15.0-1089.91 —
Ubuntu 18.04 LTS linux-oracle 4.15.0-1069.77 —
Ubuntu 18.04 LTS linux-oracle-5.4 5.4.0-1039.42~18.04.1 —
Ubuntu 18.04 LTS linux-raspi-5.4 5.4.0-1030.33~18.04.1 —
Ubuntu 16.04 LTS linux-aws-hwe 4.15.0-1098.105~16.04.1 —
Ubuntu 16.04 LTS linux-azure 4.15.0-1112.124~16.04.1 —
Ubuntu 16.04 LTS linux-gcp 4.15.0-1097.110~16.04.1 —
Ubuntu 16.04 LTS linux-hwe 4.15.0-142.146~16.04.1 —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu 16.04 LTS linux-oracle 4.15.0-1069.77~16.04.1 —
Show 5 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro FIPS 20.04 LTS linux-aws-fips +2 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-gcp-fips 5.4.0-1067.71~20.04.1 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-aws-fips 4.15.0-2041.43 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-azure-fips 4.15.0-2024.27 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-fips 4.15.0-1057.65 —
Ubuntu Pro 14.04 LTS linux-azure 4.15.0-1112.124~14.04.1 —

SUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
SLES 15 SP3 kernel-64kb +7 5.3.18-150300.59.204.1 SUSE-SU-2025:01633-1
SLES 15 SP3 kernel-default-base 5.3.18-150300.59.204.1.150300.18.122.1 SUSE-SU-2025:01633-1
SLES 12 SP5 kernel-syms +2 4.12.14-122.258.1 SUSE-SU-2025:01600-1
Show 7 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 15 SP3 kernel-default-base 5.3.18-150300.59.204.1.150300.18.122.1 SUSE-SU-2025:01633-1
SLES for SAP 15 SP3 kernel-docs +5 5.3.18-150300.59.204.1 SUSE-SU-2025:01633-1
SLE Micro 5.2 kernel-default 5.3.18-150300.59.204.1 SUSE-SU-2025:01633-1
SLE Micro 5.2 kernel-default-base 5.3.18-150300.59.204.1.150300.18.122.1 SUSE-SU-2025:01633-1
SLE Micro 5.2 kernel-rt +1 5.3.18-150300.208.1 SUSE-SU-2025:1574-1
SLE Micro 5.1 kernel-default 5.3.18-150300.59.204.1 SUSE-SU-2025:01633-1
SLE Micro 5.1 kernel-default-base 5.3.18-150300.59.204.1.150300.18.122.1 SUSE-SU-2025:01633-1
SLE Micro 5.1 kernel-rt +1 5.3.18-150300.208.1 SUSE-SU-2025:1574-1
SLE Live Patching 15 SP3 kernel-default 5.3.18-150300.59.204.1 SUSE-SU-2025:01633-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_57 1-150300.7.3.1 SUSE-SU-2025:01633-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.258.1 SUSE-SU-2025:01600-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_68 1-8.3.1 SUSE-SU-2025:01600-1
SLE HPC 15 SP3 kernel-64kb +6 5.3.18-150300.59.204.1 SUSE-SU-2025:01633-1
SLE HPC 15 SP3 kernel-default-base 5.3.18-150300.59.204.1.150300.18.122.1 SUSE-SU-2025:01633-1
SUSE Enterprise Storage 7.1 kernel-64kb +6 5.3.18-150300.59.204.1 SUSE-SU-2025:01633-1
SUSE Enterprise Storage 7.1 kernel-default-base 5.3.18-150300.59.204.1.150300.18.122.1 SUSE-SU-2025:01633-1

Advisories 4

References