Description
net/nfc/llcp_sock.c in the Linux kernel before 5.12.10 allows local unprivileged users to cause a denial of service (NULL pointer dereference and BUG) by making a getsockname call after a certain type of failure of a bind call.
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 | 5.10.46-1 | — |
| Debian 13 | linux | 5.10.46-1 | — |
| Debian 12 | linux | 5.10.46-1 | — |
| Debian 9 | linux | 4.9.272-1 | DLA-2689-1 |
| Debian 9 | linux-4.19 | 4.19.194-1~deb9u1 | DLA-2690-1 |
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 | 5.4.0-81.91 | — |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1055.58 | — |
| Ubuntu 20.04 LTS | linux-aws-5.11 +1 | 5.11.0-1016.17~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-aws-5.8 | 5.8.0-1042.44~20.04.1 | USN-5050-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1056.58 | — |
| Ubuntu 20.04 LTS | linux-azure-5.11 | 5.11.0-1013.14~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-azure-5.8 | 5.8.0-1040.43~20.04.1 | USN-5050-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1019.22 | — |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1051.55 | — |
| Ubuntu 20.04 LTS | linux-gcp-5.11 | 5.11.0-1017.19~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gcp-5.8 | 5.8.0-1039.41 | USN-5050-1 |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1051.54 | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1022.23 | — |
| Ubuntu 20.04 LTS | linux-hwe-5.11 | 5.11.0-34.36~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1045.47 | — |
| Ubuntu 20.04 LTS | linux-oem-5.10 | 5.10.0-1038.40 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1053.57 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.8 | 5.8.0-1038.39~20.04.1 | USN-5050-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1042.46 | — |
| Ubuntu 20.04 LTS | linux-riscv +4 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv-5.11 | 5.11.0-1017.18~20.04.1 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-154.161 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1110.117 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1055.58~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1122.135 | — |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1056.58~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1027.32 | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1107.121 | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1051.55~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gke-5.4 | 5.4.0-1051.54~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1022.23~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-81.91~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1098.100 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1079.87 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1053.57~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1042.46~18.04.3 | — |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1094.100 | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1111.120 | — |
| 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-fips | 5.4.0-1032.37 | — |
| 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 | 4.15.0-2052.54 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2034.38 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1068.77 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2017.19 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1072.78 | — |
| Ubuntu Pro 16.04 LTS | linux | 4.4.0-222.255 | USN-5343-1 |
| Ubuntu Pro 16.04 LTS | linux-aws | 4.4.0-1138.152 | USN-5343-1 |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1110.117~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1122.135~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1107.121~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-154.161~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-kvm | 4.4.0-1103.112 | USN-5343-1 |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1079.87~16.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1102.107 | USN-5343-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1122.135~14.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-222.255~14.04.1 | USN-5343-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +7 | 5.3.18-150300.59.68.1 | SUSE-SU-2022:1687-1 |
| SLES 15 SP3 | kernel-azure +2 | 5.3.18-150300.38.56.1 | SUSE-SU-2022:1676-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-150300.59.68.1.150300.18.41.3 | SUSE-SU-2022:1687-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150000.150.92.2 | SUSE-SU-2022:2103-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.97.1 | SUSE-SU-2022:1651-1 |
| SLES 12 SP5 | kernel-docs +3 | 4.12.14-122.121.2 | SUSE-SU-2022:1686-1 |
| SLES 12 SP5 | kernel-obs-build | 4.12.14-122.121.1 | SUSE-SU-2022:1686-1 |
| SLES 12 SP4 | kernel-default | 4.12.14-95.99.3 | SUSE-SU-2022:2083-1 |
| SLES 12 SP4 | kernel-syms +1 | 4.12.14-95.99.2 | SUSE-SU-2022:2083-1 |
Show 25 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-default | 4.4.180-94.164.3 | SUSE-SU-2022:2082-1 |
| SLES 12 SP3 | kernel-syms +1 | 4.4.180-94.164.2 | SUSE-SU-2022:2082-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_45 | 1-4.3.2 | SUSE-SU-2022:2082-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.175.2 | SUSE-SU-2022:2077-1 |
| SLES for SAP 15 SP1 | kernel-docs +4 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150000.150.92.2 | SUSE-SU-2022:2103-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.97.1 | SUSE-SU-2022:1651-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.121.2 | SUSE-SU-2022:1686-1 |
| SLES for SAP 12 SP4 | kernel-default | 4.12.14-95.99.3 | SUSE-SU-2022:2083-1 |
| SLES for SAP 12 SP4 | kernel-syms +1 | 4.12.14-95.99.2 | SUSE-SU-2022:2083-1 |
| SLES for SAP 12 SP3 | kernel-default | 4.4.180-94.164.3 | SUSE-SU-2022:2082-1 |
| SLES for SAP 12 SP3 | kernel-syms +1 | 4.4.180-94.164.2 | SUSE-SU-2022:2082-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_45 | 1-4.3.2 | SUSE-SU-2022:2082-1 |
| SLE Real Time 15 SP3 | release-notes-sle_rt | 15.3.20220422-150300.3.3.2 | SUSE-SU-2022:1669-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.89.1 | SUSE-SU-2022:1668-1 |
| SLE Micro 5.2 | kernel-default | 5.3.18-150300.59.68.1 | SUSE-SU-2022:1687-1 |
| SLE Micro 5.2 | kernel-default-base | 5.3.18-150300.59.68.1.150300.18.41.3 | SUSE-SU-2022:1687-1 |
| SLE Micro 5.2 | kernel-rt | 5.3.18-150300.88.2 | SUSE-SU-2022:1669-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-150300.59.68.1 | SUSE-SU-2022:1687-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-150300.59.68.1.150300.18.41.3 | SUSE-SU-2022:1687-1 |
| SLE Micro 5.1 | kernel-rt | 5.3.18-150300.88.2 | SUSE-SU-2022:1669-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-150300.59.68.1 | SUSE-SU-2022:1687-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_18 | 1-150300.7.5.1 | SUSE-SU-2022:1687-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_31 | 1-150100.3.3.2 | SUSE-SU-2022:2111-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150000.150.92.2 | SUSE-SU-2022:2103-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_30 | 1-150000.1.3.2 | SUSE-SU-2022:2103-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.121.2 | SUSE-SU-2022:1686-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_31 | 1-8.5.2 | SUSE-SU-2022:1686-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.99.3 | SUSE-SU-2022:2083-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_27 | 1-6.3.3 | SUSE-SU-2022:2083-1 |
| SLE HPC 15 SP1 | kernel-docs +4 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150000.150.92.2 | SUSE-SU-2022:2103-1 |
| SUSE Real Time Module 15 SP3 | kernel-rt +2 | 5.3.18-150300.88.2 | SUSE-SU-2022:1669-1 |
| SUSE Real Time Module 15 SP3 | kernel-syms-rt | 5.3.18-150300.88.1 | SUSE-SU-2022:1669-1 |
| SUSE Real Time Module 15 SP3 | release-notes-sle_rt | 15.3.20220422-150300.3.3.2 | SUSE-SU-2022:1669-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-default | 4.12.14-95.99.3 | SUSE-SU-2022:2083-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +1 | 4.12.14-95.99.2 | SUSE-SU-2022:2083-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-default | 4.4.180-94.164.3 | SUSE-SU-2022:2082-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +1 | 4.4.180-94.164.2 | SUSE-SU-2022:2082-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_45 | 1-4.3.2 | SUSE-SU-2022:2082-1 |
| SUSE OpenStack Cloud 9 | kernel-default | 4.12.14-95.99.3 | SUSE-SU-2022:2083-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +1 | 4.12.14-95.99.2 | SUSE-SU-2022:2083-1 |
| SUSE OpenStack Cloud 8 | kernel-default | 4.4.180-94.164.3 | SUSE-SU-2022:2082-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +1 | 4.4.180-94.164.2 | SUSE-SU-2022:2082-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_45 | 1-4.3.2 | SUSE-SU-2022:2082-1 |
| SUSE HPE Helion OpenStack 8 | kernel-default | 4.4.180-94.164.3 | SUSE-SU-2022:2082-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +1 | 4.4.180-94.164.2 | SUSE-SU-2022:2082-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_45 | 1-4.3.2 | SUSE-SU-2022:2082-1 |
| SUSE Enterprise Storage 6 | kernel-docs +4 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | dtb-aarch64 +1 | 5.3.18-150300.59.68.1 | SUSE-SU-2022:1687-1 |
| openSUSE Leap 15.4 | kernel-debug +4 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1 |
| openSUSE Leap 15.3 | dtb-aarch64 +7 | 5.3.18-150300.59.68.1 | SUSE-SU-2022:1687-1 |
| openSUSE Leap 15.3 | kernel-azure +2 | 5.3.18-150300.38.56.1 | SUSE-SU-2022:1676-1 |
| openSUSE Leap 15.3 | kernel-debug +4 | 4.12.14-150100.197.114.2 | SUSE-SU-2022:2111-1, SUSE-SU-2022:1687-1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-150300.59.68.1.150300.18.41.3 | SUSE-SU-2022:1687-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.10.78.1-1 | — |
Advisories 15
- USN-5343-1 linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- USN-5050-1 linux-aws-5.8, linux-azure-5.8, linux-gcp-5.8, linux-oracle-5.8 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DLA-2689-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2690-1 linux-4.19 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2022:2111-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1687-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1669-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2103-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2077-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1686-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2082-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1676-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2083-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1668-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1651-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://github.com/torvalds/linux/commit/4ac06a1e013cf5fdd963317ffd3b968560f33bba
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
- [oss-security] 20210817 Re: Linux kernel: nfc: null ptr dereference in llcp_sock_getname mailing-list
- [oss-security] 20210817 Re: Linux kernel: nfc: null ptr dereference in llcp_sock_getname mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1992810
- [oss-security] 20210824 Re: Linux kernel: nfc: null ptr dereference in llcp_sock_getname mailing-list