Description
There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the n_tty_receive_buf_common function in drivers/tty/n_tty.c.
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 | 5.5.13-1 | — |
| Debian 13 | linux | 5.5.13-1 | — |
| Debian 12 | linux | 5.5.13-1 | — |
| Debian 9 | linux | 4.9.210-1+deb9u1 | DSA-4698-1 |
| Debian 8 | linux | 3.16.84-1 | DLA-2241-1 |
| Debian 8 | linux-4.9 | 4.9.210-1+deb9u1~deb8u1 | DLA-2242-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-99.100 | USN-4345-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1066.70 | USN-4345-1 |
| Ubuntu 18.04 LTS | linux-aws-5.3 | 5.3.0-1017.18~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-5.3 | 5.3.0-1020.21~18.04.1 | USN-4342-1 |
| Ubuntu 18.04 LTS | linux-gcp +6 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-5.3 +1 | 5.3.0-1018.19~18.04.1 | USN-4342-1 |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1058.61 | USN-4345-1 |
| Ubuntu 18.04 LTS | linux-gke-5.0 | 5.0.0-1035.36 | USN-4344-1 |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-51.44~18.04.2 | USN-4342-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1059.60 | USN-4345-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1080.90 | USN-4345-1 |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1050.55 | USN-4344-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1038.42 | USN-4345-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.3 | 5.3.0-1016.18~18.04.1 | USN-4342-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1061.65 | USN-4345-1 |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1023.25~18.04.1 | USN-4342-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1077.84 | USN-4345-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-178.208 | USN-4346-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1106.117 | USN-4346-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1066.70~16.04.1 | USN-4345-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1082.92~16.04.1 | USN-4345-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1061.65 | USN-4345-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-99.100~16.04.1 | USN-4345-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1070.77 | USN-4346-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1038.42~16.04.1 | USN-4345-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1132.141 | USN-4346-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1136.144 | USN-4346-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 18.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2018.18 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2006.7 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1029.34 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1033.38 | — |
| Ubuntu Pro 18.04 LTS | linux | 4.15.0-99.100 | LSN-0068-1, LSN-0066-1 |
| Ubuntu Pro 18.04 LTS | linux-aws | 4.15.0-1066.70 | LSN-0068-1, LSN-0066-1 |
| Ubuntu Pro 18.04 LTS | linux-oem | 4.15.0-1080.90 | LSN-0068-1, LSN-0066-1 |
| Ubuntu Pro 16.04 LTS | linux | 4.4.0-178.208 | LSN-0068-1, LSN-0066-1 |
| Ubuntu Pro 16.04 LTS | linux-aws | 4.4.0-1106.117 | LSN-0068-1, LSN-0066-1 |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1082.92~16.04.1 | LSN-0066-1 |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1066.70 | USN-4346-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1082.92~14.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-178.208~14.04.1 | USN-4346-1, LSN-0068-1, LSN-0066-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-240.rt7.54.el8 | RHSA-2020:4609 |
| RHEL 8 | perf +26 | 4.18.0-240.el8 | RHSA-2020:4431 |
| RHEL 7 | kernel-rt +10 | 3.10.0-1160.31.1.rt56.1169.el7 | RHSA-2021:2316 |
| RHEL 7 | perf +18 | 3.10.0-1160.31.1.el7 | RHSA-2021:2314 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.7 TUS | perf +12 | 3.10.0-1062.56.1.el7 | RHSA-2021:3522 |
| RHEL 7.7 E4S | perf +14 | 3.10.0-1062.56.1.el7 | RHSA-2021:3522 |
| RHEL 7.7 AUS | perf +12 | 3.10.0-1062.56.1.el7 | RHSA-2021:3522 |
| RHEL 7.6 TUS | perf +12 | 3.10.0-957.80.1.el7 | RHSA-2021:3320 |
| RHEL 7.6 E4S | perf +13 | 3.10.0-957.80.1.el7 | RHSA-2021:3320 |
| RHEL 7.6 AUS | perf +12 | 3.10.0-957.80.1.el7 | RHSA-2021:3320 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-tools-libs-devel | 4.18.0-240.el8 | ALSA-2020:4431 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.27.1 | SUSE-SU-2020:0511-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.34.1 | SUSE-SU-2020:0836-1, SUSE-SU-2020:0560-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.10.1 | SUSE-SU-2020:0558-1 |
| SLES 12 SP5 | kernel-docs | 4.12.14-122.17.2 | SUSE-SU-2020:0580-1 |
| SLES 12 SP5 | kernel-syms +3 | 4.12.14-122.17.1 | SUSE-SU-2020:0580-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.37.1 | SUSE-SU-2020:0559-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.116.1 | SUSE-SU-2020:1275-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_31 | 1-4.3.1 | SUSE-SU-2020:1275-1 |
Show 20 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.129.1 | SUSE-SU-2020:1255-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_34 | 1-3.3.1 | SUSE-SU-2020:1255-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-108.111.1 | SUSE-SU-2020:14354-1 |
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.10.1 | SUSE-SU-2020:0558-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.17.1 | SUSE-SU-2020:0580-1 |
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.37.1 | SUSE-SU-2020:0559-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.116.1 | SUSE-SU-2020:1275-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_31 | 1-4.3.1 | SUSE-SU-2020:1275-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.129.1 | SUSE-SU-2020:1255-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_34 | 1-3.3.1 | SUSE-SU-2020:1255-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.5.1 | SUSE-SU-2020:0667-1 |
| SLE Real Time 12 SP4 | kernel-rt +3 | 4.12.14-8.15.1 | SUSE-SU-2020:0649-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.34.1 | SUSE-SU-2020:0836-1, SUSE-SU-2020:0560-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_10 | 1-3.3.1 | SUSE-SU-2020:0836-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_9 | 1-3.5.1 | SUSE-SU-2020:0560-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_18 | 1-1.5.1 | SUSE-SU-2020:1663-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.17.1 | SUSE-SU-2020:0580-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_3 | 1-8.5.1 | SUSE-SU-2020:0580-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_12 | 1-6.3.1 | SUSE-SU-2020:0584-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.20.1 | SUSE-SU-2020:0688-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.116.1 | SUSE-SU-2020:1275-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_31 | 1-4.3.1 | SUSE-SU-2020:1275-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.116.1 | SUSE-SU-2020:1275-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_31 | 1-4.3.1 | SUSE-SU-2020:1275-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.129.1 | SUSE-SU-2020:1255-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_34 | 1-3.3.1 | SUSE-SU-2020:1255-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.116.1 | SUSE-SU-2020:1275-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_31 | 1-4.3.1 | SUSE-SU-2020:1275-1 |
| SUSE Enterprise Storage 5 | kernel-syms +2 | 4.4.180-94.116.1 | SUSE-SU-2020:1275-1 |
| SUSE Enterprise Storage 5 | kgraft-patch-SLE12-SP3_Update_31 | 1-4.3.1 | SUSE-SU-2020:1275-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 5.14.6-1.4 | openSUSE-SU-2024:13704-1, openSUSE-SU-2024:10728-1 |
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.40.1 | openSUSE-SU-2020:0336-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.173-137.228 | 1.0-0.amzn2 | ALAS2-2020-1405 |
| Amazon Linux 2 | perf +8 | 4.14.173-137.228.amzn2 | ALAS2-2020-1405 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-240.el8 | ELSA-2020-4431 |
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.39.1.el7uek | ELSA-2020-5676, ELSA-2020-5670 |
| Oracle Linux 7 | kernel-uek-tools +3 | 4.14.35-1902.302.2.el7uek | ELSA-2020-5676 |
| Oracle Linux 7 | perf +12 | 3.10.0-1160.31.1.el7 | ELSA-2021-2314, ELSA-2020-5676 |
Advisories 41
- ALSA-2020:4431 Moderate: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2020:4431 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2021:2316 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2021:2314 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2021:3522 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- WID-SEC-2025-0227 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- RHSA-2021:3320 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2020:4609 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- USN-4344-1 linux-gke-5.0, linux-oem-osp11 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4342-1 linux, linux-aws, linux-azure, linux-azure-5.3, linux-gcp, linux-gcp-5.3, linux-gke-5.3, linux-hwe, linux-kvm, linux-oracle, linux-oracle-5.3, linux-raspi2, linux-raspi2-5.3 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- LSN-0068-1 Kernel Live Patch Security Notice Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4346-1 linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4345-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- LSN-0066-1 Kernel Live Patch Security Notice Ubuntu Security Notices (USN) · Jun 3, 2026
- DSA-4698-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2242-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2241-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:14354-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0649-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1255-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0584-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13704-1 kernel-devel-longterm-6.6.17-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0559-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0580-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0336-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0560-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0558-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1663-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0511-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0688-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10728-1 kernel-devel-5.14.6-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0836-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0063 Juniper Junos Space: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 8, 2025
- SUSE-SU-2020:0667-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2020:1275-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2024-1591 Juniper JUNOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2024
- ALAS2-2020-1405 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 29, 2023
- ELSA-2021-2314 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 10, 2021
- ELSA-2020-4431 Moderate: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
- ELSA-2020-5676 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 11, 2020
- ELSA-2020-5670 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 6, 2020
References
- https://bugzilla.kernel.org/show_bug.cgi?id=206361
- openSUSE-SU-2020:0336 vendor-advisory
- USN-4344-1 vendor-advisory
- USN-4345-1 vendor-advisory
- USN-4342-1 vendor-advisory
- USN-4346-1 vendor-advisory
- [debian-lts-announce] 20200609 [SECURITY] [DLA 2241-1] linux security update mailing-list
- [debian-lts-announce] 20200610 [SECURITY] [DLA 2242-1] linux-4.9 security update mailing-list
- [debian-lts-announce] 20200610 [SECURITY] [DLA 2241-2] linux security update mailing-list
- DSA-4698 vendor-advisory
- https://security.netapp.com/advisory/ntap-20200924-0004/