Description
Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener after being released. Fixed in Ubuntu Linux kernel 5.4.0-51.56, 5.3.0-68.63, 4.15.0-121.123, 4.4.0-193.224, 3.13.0.182.191 and 3.2.0-149.196.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Canonical | Linux kernel | 5.4 kernel – < 5.4.0-51.56, 5.3 kernel – < 5.3.0-68.63, 4.15 kernel – < 4.15.0-121.123, 4.4 kernel – < 4.4.0-193.224, 3.13 kernel – < 3.13.0.182.191, 3.2 kernel – < 3.2.0-149.196 | 5.4.0-51.56 |
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 | 5.14.6-1 | — |
| Debian 13 | linux | 5.14.6-1 | — |
| Debian 12 | linux | 5.14.6-1 | — |
| Debian 11 | linux | 5.10.46-5 | DSA-4978-1 |
| Debian 9 | linux | 4.9.290-1 | DLA-2843-1 |
| Debian 9 | linux-4.19 | 4.19.208-1~deb9u1 | DLA-2785-1 |
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 | 5.4.0-51.56 | USN-4576-1 |
| Ubuntu 20.04 LTS | linux-aws +2 | 5.4.0-1028.29 | USN-4576-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1031.32 | USN-4576-1 |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1026.27 | USN-4576-1 |
| Ubuntu 20.04 LTS | linux-oem-5.6 | 5.6.0-1031.32 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1021.24 | USN-4576-1 |
| Ubuntu 20.04 LTS | linux-riscv | 5.4.0-36.41 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-121.123 | USN-4578-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1086.91 | USN-4578-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 +2 | 5.4.0-1028.29~18.04.1 | USN-4576-1 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1099.110 | USN-4578-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1031.32~18.04.1 | USN-4576-1 |
| Ubuntu 18.04 LTS | linux-gcp +10 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1086.98 | USN-4578-1 |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1072.76 | USN-4578-1 |
| Ubuntu 18.04 LTS | linux-gke-5.0 | 5.0.0-1049.50 | USN-4577-1 |
| Ubuntu 18.04 LTS | linux-gke-5.3 | 5.3.0-1038.40 | USN-4577-1 |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-68.63 | USN-4577-1 |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-51.56~18.04.1 | USN-4576-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1077.79 | USN-4578-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1099.109 | USN-4578-1 |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1069.75 | USN-4577-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1057.62 | USN-4578-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1021.24~18.04.1 | USN-4576-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1073.78 | USN-4578-1 |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1035.37 | USN-4577-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1089.98 | USN-4578-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-193.224 | USN-4579-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1117.131 | USN-4579-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1085.90~16.04.1 | USN-4578-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1098.109~16.04.1 | USN-4578-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1086.98~16.04.1 | USN-4578-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-120.122~16.04.1 | USN-4578-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1082.91 | USN-4579-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1056.61~16.04.1 | USN-4578-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1141.151 | USN-4579-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1145.155 | USN-4579-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 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 | 4.15.0-2030.31 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2012.14 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1044.50 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1048.53 | — |
| Ubuntu Pro 20.04 LTS | linux | 5.4.0-51.56 | LSN-0072-1 |
| Ubuntu Pro 20.04 LTS | linux-aws +1 | 5.4.0-1028.29 | LSN-0072-1 |
| Ubuntu Pro 20.04 LTS | linux-azure | 5.4.0-1031.32 | LSN-0072-1 |
| Ubuntu Pro 18.04 LTS | linux | 4.15.0-121.123 | LSN-0072-1 |
| Ubuntu Pro 18.04 LTS | linux-aws | 4.15.0-1086.91 | LSN-0072-1 |
| Ubuntu Pro 18.04 LTS | linux-oem | 4.15.0-1099.109 | LSN-0072-1 |
| Ubuntu Pro 16.04 LTS | linux | 4.4.0-193.224 | LSN-0072-1 |
| Ubuntu Pro 16.04 LTS | linux-aws | 4.4.0-1117.131 | LSN-0072-1 |
| Ubuntu Pro 14.04 LTS | linux | 3.13.0-182.233 | USN-4580-1 |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1081.85 | USN-4579-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1098.109~14.04.1 | USN-4578-1 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-193.224~14.04.1 | USN-4579-1, LSN-0072-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +7 | 5.3.18-150300.59.98.1 | SUSE-SU-2022:3775-1 |
| SLES 15 SP3 | kernel-azure +2 | 5.3.18-150300.38.80.1 | SUSE-SU-2022:3609-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-150300.59.98.1.150300.18.56.3 | SUSE-SU-2022:3775-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-150200.24.134.1.150200.9.63.2 | SUSE-SU-2022:3704-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.134.1 | SUSE-SU-2022:3704-1 |
| SLES 11 SP4 | kernel-ec2 +5 | 3.0.101-108.138.1 | SUSE-SU-2023:0416-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP2 | kernel-default-base | 5.3.18-150200.24.134.1.150200.9.63.2 | SUSE-SU-2022:3704-1 |
| SLES for SAP 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.134.1 | SUSE-SU-2022:3704-1 |
| SLE Micro 5.2 | kernel-default | 5.3.18-150300.59.98.1 | SUSE-SU-2022:3775-1 |
| SLE Micro 5.2 | kernel-default-base | 5.3.18-150300.59.98.1.150300.18.56.3 | SUSE-SU-2022:3775-1 |
| SLE Micro 5.2 | kernel-rt | 5.3.18-150300.106.1 | SUSE-SU-2022:3809-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-150300.59.98.1 | SUSE-SU-2022:3775-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-150300.59.98.1.150300.18.56.3 | SUSE-SU-2022:3775-1 |
| SLE Micro 5.1 | kernel-rt | 5.3.18-150300.106.1 | SUSE-SU-2022:3809-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4-RT_Update_1 | 1-150400.1.3.1 | SUSE-SU-2022:4617-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-150300.59.98.1 | SUSE-SU-2022:3775-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_25 | 1-150300.7.5.1 | SUSE-SU-2022:3775-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-150200.24.134.1 | SUSE-SU-2022:3704-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_31 | 1-150200.5.3.2 | SUSE-SU-2022:3704-1 |
| SLE HPC 15 SP2 | kernel-default-base | 5.3.18-150200.24.134.1.150200.9.63.2 | SUSE-SU-2022:3704-1 |
| SLE HPC 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.134.1 | SUSE-SU-2022:3704-1 |
| SUSE Real Time Module 15 SP4 | kernel-rt +3 | 5.14.21-150400.15.5.1 | SUSE-SU-2022:4617-1 |
| SUSE Real Time Module 15 SP3 | kernel-rt +3 | 5.3.18-150300.106.1 | SUSE-SU-2022:3809-1 |
| SUSE Manager Server 4.1 | kernel-default-base | 5.3.18-150200.24.134.1.150200.9.63.2 | SUSE-SU-2022:3704-1 |
| SUSE Manager Server 4.1 | kernel-docs +5 | 5.3.18-150200.24.134.1 | SUSE-SU-2022:3704-1 |
| SUSE Manager Retail Branch Server 4.1 | kernel-default-base | 5.3.18-150200.24.134.1.150200.9.63.2 | SUSE-SU-2022:3704-1 |
| SUSE Manager Retail Branch Server 4.1 | kernel-docs +4 | 5.3.18-150200.24.134.1 | SUSE-SU-2022:3704-1 |
| SUSE Manager Proxy 4.1 | kernel-default-base | 5.3.18-150200.24.134.1.150200.9.63.2 | SUSE-SU-2022:3704-1 |
| SUSE Manager Proxy 4.1 | kernel-docs +4 | 5.3.18-150200.24.134.1 | SUSE-SU-2022:3704-1 |
| SUSE Enterprise Storage 7 | kernel-default-base | 5.3.18-150200.24.134.1.150200.9.63.2 | SUSE-SU-2022:3704-1 |
| SUSE Enterprise Storage 7 | kernel-docs +5 | 5.3.18-150200.24.134.1 | SUSE-SU-2022:3704-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | dtb-aarch64 | 5.3.18-150300.59.98.1 | SUSE-SU-2022:3775-1 |
| openSUSE Leap 15.4 | kernel-rt +3 | 5.14.21-150400.15.5.1 | SUSE-SU-2022:4617-1 |
| openSUSE Leap 15.3 | dtb-aarch64 +11 | 5.3.18-150300.59.98.1 | SUSE-SU-2022:3775-1 |
| openSUSE Leap 15.3 | kernel-azure +2 | 5.3.18-150300.38.80.1 | SUSE-SU-2022:3609-1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-150300.59.98.1.150300.18.56.3 | SUSE-SU-2022:3775-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.2 | kernel-default | 5.3.18-150300.59.98.1 | SUSE-SU-2022:3775-1 |
| openSUSE Leap Micro 5.2 | kernel-default-base | 5.3.18-150300.59.98.1.150300.18.56.3 | SUSE-SU-2022:3775-1 |
| openSUSE Leap Micro 5.2 | kernel-rt | 5.3.18-150300.106.1 | SUSE-SU-2022:3809-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.248-189.473 | 1.0-0.amzn2 | ALAS2-2021-1712 |
| Amazon Linux 2 | perf +8 | 4.14.248-189.473.amzn2 | ALAS2-2021-1712 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +4 | 5.4.17-2136.300.7.el8uek | ELSA-2021-9486 |
| Oracle Linux 7 | kernel-uek-container +1 | 5.4.17-2136.300.7.el8 | ELSA-2021-9487 |
| Oracle Linux 7 | perf +3 | 5.4.17-2136.300.7.el7uek | ELSA-2021-9486 |
Advisories 19
- USN-4578-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4579-1 linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4576-1 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4580-1 linux, linux-lts-trusty vulnerability Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4577-1 linux-hwe, linux-gke-5.0, linux-gke-5.3, linux-oem-osp1, linux-raspi2-5.3 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- LSN-0072-1 Kernel Live Patch Security Notice Ubuntu Security Notices (USN) · Jun 3, 2026
- DSA-4978-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2843-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2785-1 linux-4.19 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2022:3609-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0416-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4617-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3775-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3704-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3809-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-1762 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 24, 2024
- ALAS2-2021-1712 Moderate: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jan 30, 2023
- ELSA-2021-9486 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 14, 2021
- ELSA-2021-9487 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 14, 2021
References
- https://launchpad.net/bugs/1883840 vendor-advisory
- https://ubuntu.com/USN-4576-1 vendor-advisory
- https://ubuntu.com/USN-4577-1 vendor-advisory
- https://ubuntu.com/USN-4578-1 vendor-advisory
- https://ubuntu.com/USN-4579-1 vendor-advisory
- https://ubuntu.com/USN-4580-1 vendor-advisory
- https://lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza%40canonical.com/T/
- https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=01872cb896c76cedeabe93a08456976ab55ad695 vendor-advisory
- https://security.netapp.com/advisory/ntap-20210304-0006/
- DSA-4978 vendor-advisory
- [debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update mailing-list
- [debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update mailing-list