Description
A NULL pointer dereference flaw was found in the Linux kernel’s IEEE 802.15.4 wireless networking subsystem in the way the user closes the LR-WPAN connection. This flaw allows a local user to crash the system. The highest threat from this vulnerability is to system availability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Kernel | Fixed in Kernel 5.12 | — |
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 ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.10.38-1 | — |
| Debian 13 | linux | 5.10.38-1 | — |
| Debian 12 | linux | 5.10.38-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-74.83 | — |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1049.51 | — |
| Ubuntu 20.04 LTS | linux-aws-5.8 | 5.8.0-1038.40~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1048.50 | — |
| Ubuntu 20.04 LTS | linux-azure-5.8 | 5.8.0-1036.38~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1012.15 | — |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1044.47 | — |
| Ubuntu 20.04 LTS | linux-gcp-5.8 | 5.8.0-1035.37~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1044.46 | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1016.17 | — |
| Ubuntu 20.04 LTS | linux-hwe-5.8 | 5.8.0-59.66~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1040.41 | — |
| Ubuntu 20.04 LTS | linux-oem-5.10 | 5.10.0-1025.26 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1046.50 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.8 | 5.8.0-1033.34~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1036.39 | — |
| Ubuntu 20.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv-5.8 | 5.8.0-29.31~20.04.1 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-144.148 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1103.110 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1049.51~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1115.128 | — |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1048.50~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1022.26 | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1100.113 | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1044.47~18.04.2 | — |
| Ubuntu 18.04 LTS | linux-gke-5.4 | 5.4.0-1044.46~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1016.17~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-74.83~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1092.94 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1072.80 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1046.50~18.04.2 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1036.39~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1086.91 | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1103.112 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 16.04 LTS | linux-fips | 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 | 4.15.0-2045.47 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2027.30 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1060.68 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1088.95 | — |
| Ubuntu Pro 16.04 LTS | linux | 4.4.0-239.273 | USN-6014-1 |
| Ubuntu Pro 16.04 LTS | linux-aws | 4.4.0-1155.170 | USN-6001-1 |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1103.110~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1115.128~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1100.113~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-144.148~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-kvm | 4.4.0-1118.128 | USN-6014-1 |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1072.80~16.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1117.123 | USN-6013-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1115.128~14.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-239.273~14.04.1 | USN-6014-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-348.rt7.130.el8 | RHSA-2021:4140 |
| RHEL 8 | perf +26 | 4.18.0-348.el8 | RHSA-2021:4356 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-tools-libs-devel | 4.18.0-348.el8 | ALSA-2021:4356 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +7 | 5.3.18-59.19.1 | SUSE-SU-2021:2687-1 |
| SLES 15 SP3 | kernel-azure +2 | 5.3.18-38.17.1 | SUSE-SU-2021:2645-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-59.19.1.18.10.1 | SUSE-SU-2021:2687-1 |
| SLES 15 SP2 | kernel-azure +2 | 5.3.18-18.61.1 | SUSE-SU-2021:2646-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.78.1.9.36.1 | SUSE-SU-2021:2756-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-24.78.1 | SUSE-SU-2021:2756-1 |
| SLES 15 SP1 | kernel-docs +4 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLES 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLES 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLES 15 | kernel-syms +4 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.68.1 | SUSE-SU-2021:2644-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.83.1 | SUSE-SU-2021:2647-1 |
Show 25 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.161.1 | SUSE-SU-2021:3929-1 |
| SLES for SAP 15 SP1 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLES for SAP 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLES for SAP 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLES for SAP 15 | kernel-syms +3 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.68.1 | SUSE-SU-2021:2644-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.83.1 | SUSE-SU-2021:2647-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.54.1 | SUSE-SU-2021:2643-1 |
| SLE Micro 5.0 | kernel-default | 5.3.18-24.78.1 | SUSE-SU-2021:2756-1 |
| SLE Micro 5.0 | kernel-default-base | 5.3.18-24.78.1.9.36.1 | SUSE-SU-2021:2756-1 |
| SLE Micro 5.0 | kernel-rt | 5.3.18-48.1 | SUSE-SU-2021:2678-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-59.19.1 | SUSE-SU-2021:2687-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_5 | 1-7.3.1 | SUSE-SU-2021:2687-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.78.1 | SUSE-SU-2021:2756-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_18 | 1-5.3.1 | SUSE-SU-2021:2756-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_27 | 1-3.3.1 | SUSE-SU-2021:3876-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_26 | 1-1.3.1 | SUSE-SU-2021:3969-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.83.1 | SUSE-SU-2021:2647-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_22 | 1-8.3.1 | SUSE-SU-2021:2647-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_23 | 1-6.3.1 | SUSE-SU-2021:3972-1 |
| SLE HPC 15 SP1 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLE HPC 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLE HPC 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLE HPC 15 | kernel-syms +3 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SUSE Real Time Module 15 SP2 | kernel-rt +3 | 5.3.18-48.1 | SUSE-SU-2021:2678-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SUSE Enterprise Storage 6 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SUSE Enterprise Storage 6 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | dtb-aarch64 +7 | 5.3.18-59.19.1 | openSUSE-SU-2021:2687-1 |
| openSUSE Leap 15.3 | kernel-azure +2 | 5.3.18-38.17.1 | openSUSE-SU-2021:2645-1 |
| openSUSE Leap 15.3 | kernel-debug +4 | 4.12.14-197.102.2 | openSUSE-SU-2021:3876-1, openSUSE-SU-2021:2687-1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-59.19.1.18.10.1 | openSUSE-SU-2021:2687-1 |
| openSUSE Leap 15.2 | kernel-default-base | 5.3.18-lp152.87.1.lp152.8.40.1 | openSUSE-SU-2021:1142-1 |
| openSUSE Leap 15.2 | kernel-docs +8 | 5.3.18-lp152.87.1 | openSUSE-SU-2021:1142-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-348.el8 | ELSA-2021-4356 |
Advisories 25
- ALSA-2021:4356 Moderate: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- USN-6014-1 linux, linux-kvm, linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6013-1 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6001-1 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- RHSA-2021:4356 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2021:4140 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 14, 2026
- SUSE-SU-2021:3929-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2687-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2646-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3876-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1142-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2647-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3969-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2645-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3935-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2644-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2643-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2645-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2678-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3972-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2756-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3876-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2687-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-0878 Linux Kernel: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Apr 5, 2023
- ELSA-2021-4356 Moderate: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 16, 2021