Description
A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux Kernel | Kernel | unspecified – < 5.4.168, unspecified – < 5.10.88, unspecified – < 5.15.11, unspecified – < 5.16-rc6 | 5.4.168 |
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 | 5.15.15-1 | — |
| Debian 13 | linux | 5.15.15-1 | — |
| Debian 12 | linux | 5.15.15-1 | — |
| Debian 10 | linux | 4.19.232-1 | DSA-5096-1 |
| Debian 9 | linux-4.19 | 4.19.232-1~deb9u1 | DLA-2941-1 |
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 | 5.4.0-100.113 | USN-5294-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1066.69 | USN-5294-2 |
| Ubuntu 20.04 LTS | linux-aws-5.13 | 5.13.0-1014.15~20.04.1 | USN-5295-2 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1070.73 | USN-5294-2 |
| Ubuntu 20.04 LTS | linux-azure-5.13 | 5.13.0-1014.16~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-azure-fde | 5.4.0-1070.73+cvm1.1 | USN-5294-2 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1028.31 | USN-5294-2 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1065.69 | USN-5294-2 |
| Ubuntu 20.04 LTS | linux-gcp-5.13 | 5.13.0-1015.18~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1061.64 | USN-5266-1 |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1034.35 | USN-5294-2 |
| Ubuntu 20.04 LTS | linux-hwe-5.13 | 5.13.0-30.33~20.04.1 | USN-5295-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1015.16 | USN-5294-2 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1056.58 | USN-5294-2 |
| Ubuntu 20.04 LTS | linux-oem-5.14 | 5.14.0-1022.24 | USN-5278-1 |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1064.68 | USN-5294-2 |
| Ubuntu 20.04 LTS | linux-oracle-5.13 | 5.13.0-1018.22~20.04.1 | USN-5295-2 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1053.60 | USN-5294-2 |
| Ubuntu 20.04 LTS | linux-riscv +17 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-169.177 | USN-5298-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1121.129 | USN-5298-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1066.69~18.04.1 | USN-5294-2 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1131.144 | USN-5298-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1070.73~18.04.1 | USN-5294-2 |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1035.40 | USN-5298-1 |
| Ubuntu 18.04 LTS | linux-gcp +11 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1116.130 | USN-5298-1 |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1065.69~18.04.1 | USN-5294-2 |
| Ubuntu 18.04 LTS | linux-gke-5.4 | 5.4.0-1061.64~18.04.1 | USN-5266-1 |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1034.35~18.04.1 | USN-5294-2 |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-100.113~18.04.1 | USN-5294-2 |
| Ubuntu 18.04 LTS | linux-ibm-5.4 | 5.4.0-1015.16~18.04.1 | USN-5294-2 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1107.109 | USN-5298-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1087.95 | USN-5298-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1064.68~18.04.1 | USN-5294-2 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1053.60~18.04.1 | USN-5294-2 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1103.110 | USN-5298-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1120.129 | USN-5298-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 6 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 | 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 | 5.4.0-1043.49 | — |
| 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 | 4.15.0-2061.63 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2043.47 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1078.87 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2026.28 | — |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1120.128~16.04.1 | USN-5298-1 |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1131.144~16.04.1 | USN-5298-1 |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1116.130~16.04.1 | USN-5298-1 |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-169.177~16.04.1 | USN-5298-1 |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1087.95~16.04.1 | USN-5298-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1131.144~14.04.1 | USN-5298-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +7 | 5.3.18-150300.59.49.1 | SUSE-SU-2022:0370-1 |
| SLES 15 SP3 | kernel-azure +1 | 5.3.18-150300.38.40.4 | SUSE-SU-2022:0363-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-150300.59.49.1.150300.18.31.1 | SUSE-SU-2022:0370-1 |
| SLES 15 SP3 | kernel-syms-azure | 5.3.18-150300.38.40.1 | SUSE-SU-2022:0363-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.102.1.9.48.1 | SUSE-SU-2022:0365-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-24.102.1 | SUSE-SU-2022:0365-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP2 | kernel-default-base | 5.3.18-24.102.1.9.48.1 | SUSE-SU-2022:0365-1 |
| SLES for SAP 15 SP2 | kernel-docs +5 | 5.3.18-24.102.1 | SUSE-SU-2022:0365-1 |
| SLE Real Time 15 SP2 | kernel-default-base | 5.3.18-24.102.1.9.48.1 | SUSE-SU-2022:0365-1 |
| SLE Real Time 15 SP2 | kernel-docs +4 | 5.3.18-24.102.1 | SUSE-SU-2022:0365-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-150300.59.49.1 | SUSE-SU-2022:0370-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-150300.59.49.1.150300.18.31.1 | SUSE-SU-2022:0370-1 |
| SLE Micro 5.1 | kernel-rt | 5.3.18-150300.76.1 | SUSE-SU-2022:0543-1 |
| SLE Micro 5.0 | kernel-default | 5.3.18-24.102.1 | SUSE-SU-2022:0365-1 |
| SLE Micro 5.0 | kernel-default-base | 5.3.18-24.102.1.9.48.1 | SUSE-SU-2022:0365-1 |
| SLE Micro 5.0 | kernel-rt | 5.3.18-73.1 | SUSE-SU-2022:0544-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-150300.59.49.1 | SUSE-SU-2022:0370-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_0 | 12-3.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_1 +2 | 10-150300.2.1 | SUSE-SU-2022:0660-1, SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_10 +1 | 4-150300.2.1 | SUSE-SU-2022:0660-1, SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_12 +1 | 3-150300.2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_14 | 1-150300.7.3.1 | SUSE-SU-2022:0370-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_4 | 9-150300.2.1 | SUSE-SU-2022:0660-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_5 | 8-150300.2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_6 +1 | 6-150300.2.1 | SUSE-SU-2022:0660-1, SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_9 | 5-150300.2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.102.1 | SUSE-SU-2022:0365-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_11 | 15-2.2 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_12 +1 | 12-2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_14 +2 | 10-2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_17 | 9-2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_18 | 8-2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_19 +1 | 6-2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_21 | 5-2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_22 | 4-2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_23 | 3-2.1 | SUSE-SU-2022:0619-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_24 | 1-5.3.1 | SUSE-SU-2022:0365-1 |
| SLE HPC 15 SP2 | kernel-default-base | 5.3.18-24.102.1.9.48.1 | SUSE-SU-2022:0365-1 |
| SLE HPC 15 SP2 | kernel-docs +5 | 5.3.18-24.102.1 | SUSE-SU-2022:0365-1 |
| SUSE Real Time Module 15 SP3 | kernel-rt +3 | 5.3.18-150300.76.1 | SUSE-SU-2022:0543-1 |
| SUSE Real Time Module 15 SP2 | kernel-rt +3 | 5.3.18-73.1 | SUSE-SU-2022:0544-1 |
| SUSE Manager Server 4.1 | kernel-default-base | 5.3.18-24.102.1.9.48.1 | SUSE-SU-2022:0365-1 |
| SUSE Manager Server 4.1 | kernel-docs +5 | 5.3.18-24.102.1 | SUSE-SU-2022:0365-1 |
| SUSE Manager Retail Branch Server 4.1 | kernel-default-base | 5.3.18-24.102.1.9.48.1 | SUSE-SU-2022:0365-1 |
| SUSE Manager Retail Branch Server 4.1 | kernel-docs +4 | 5.3.18-24.102.1 | SUSE-SU-2022:0365-1 |
| SUSE Manager Proxy 4.1 | kernel-default-base | 5.3.18-24.102.1.9.48.1 | SUSE-SU-2022:0365-1 |
| SUSE Manager Proxy 4.1 | kernel-docs +4 | 5.3.18-24.102.1 | SUSE-SU-2022:0365-1 |
| SUSE Enterprise Storage 7 | kernel-default-base | 5.3.18-24.102.1.9.48.1 | SUSE-SU-2022:0365-1 |
| SUSE Enterprise Storage 7 | kernel-docs +5 | 5.3.18-24.102.1 | SUSE-SU-2022:0365-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | dtb-aarch64 +11 | 5.3.18-150300.59.49.1 | openSUSE-SU-2022:0370-1 |
| openSUSE Leap 15.3 | kernel-azure +1 | 5.3.18-150300.38.40.4 | openSUSE-SU-2022:0363-1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-150300.59.49.1.150300.18.31.1 | openSUSE-SU-2022:0370-1 |
| openSUSE Leap 15.3 | kernel-syms-azure | 5.3.18-150300.38.40.1 | openSUSE-SU-2022:0363-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.18.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +4 | 5.4.17-2136.306.1.3.el8uek | ELSA-2022-9273 |
| Oracle Linux 7 | kernel-uek-container +1 | 5.4.17-2136.306.1.3.el8 | ELSA-2022-9274 |
| Oracle Linux 7 | perf +3 | 5.4.17-2136.306.1.3.el7uek | ELSA-2022-9273 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
-
Chinmay1743/af_packet.c ★ 1 · Sep 17, 2025
Proof-Of-Concept to check privileges of af_packet.c for validating the privileges acquired by any hacker upon successful exploitation of CVE-2021-22600
-
sendINUX/CVE-2021-22600__DirtyPagetable ★ 1 · Jun 22, 2025
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 20
- USN-5278-1 linux-oem-5.14 vulnerabilities Ubuntu Security Notices (USN) · Sep 14, 2026
- USN-5294-1 linux vulnerabilities Ubuntu Security Notices (USN) · Sep 14, 2026
- USN-5298-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-dell300x, linux-gcp, linux-gcp-4.15, linux-hwe, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 14, 2026
- USN-5294-2 linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-azure-fde, linux-bluefield, linux-gcp, linux-gcp-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-ibm, linux-ibm-5.4 linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Sep 14, 2026
- USN-5295-2 linux, linux-aws, linux-aws-5.13, linux-azure, linux-gcp, linux-kvm, linux-oracle, linux-oracle-5.13, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Sep 14, 2026
- USN-5295-1 linux-hwe-5.13 vulnerabilities Ubuntu Security Notices (USN) · Sep 14, 2026
- USN-5266-1 linux-gke, linux-gke-5.4 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DSA-5096-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2941-1 linux-4.19 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2022:0543-1 Security update for the Linux RT Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0363-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0365-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0363-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0370-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0544-1 Security update for the Linux RT Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0660-1 Security update for the Linux Kernel (Live Patch 2 for SLE 15 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0370-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0619-1 Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2022-9274 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 11, 2022
- ELSA-2022-9273 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 11, 2022