Vulnerability · Published Nov 28, 2022 · Assigned by redhat
CVE-2022-4129
Medium 5.5
In plain English
A medium-severity security flaw in Linux kernel (l2tp). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 92.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A flaw was found in the Linux kernel's Layer 2 Tunneling Protocol (L2TP). A missing lock when clearing sk_user_data can lead to a race condition and NULL pointer dereference. A local user could use this flaw to potentially crash the system causing a denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | bpftool | 7.0.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-devel-matched | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-modules | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-modules-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-modules-extra | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-devel-matched | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-modules | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-modules-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-modules-extra | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-abi-stablelists | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-core | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-cross-headers | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-debug | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-debug | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-debug-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-debug-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-debug-devel-matched | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-debug-modules | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-debug-modules-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-debug-modules-extra | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-debug-uki-virt | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-devel | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-devel-matched | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-doc | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-doc | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-modules | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-modules | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-modules-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-modules-extra | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-rt | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-core | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-core | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-debug | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug-core | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-debug-core | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug-devel | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-debug-devel | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug-kvm | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-debug-kvm | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug-modules | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-debug-modules | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:9 | kernel-rt-debug-modules-core | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-debug-modules-extra | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-devel | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-devel | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-kvm | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-kvm | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-modules | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-modules | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:9 | kernel-rt-modules-core | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-modules-extra | 4.18.0-477.10.1.rt7.274.el8_8 | ALSA-2023:2736 |
| AlmaLinux:9 | kernel-rt-modules-extra | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-tools | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-tools | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-tools-libs | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-tools-libs-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-uki-virt | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-zfcpdump | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-zfcpdump-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-zfcpdump-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-zfcpdump-devel-matched | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-zfcpdump-modules | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-zfcpdump-modules-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | kernel-zfcpdump-modules-extra | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | perf | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | perf | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | python3-perf | 4.18.0-477.10.1.el8_8 | ALSA-2023:2951 |
| AlmaLinux:9 | python3-perf | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | rtla | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| Debian:12 | linux | 6.1.4-1 | DEBIAN-CVE-2022-4129 |
| Debian:13 | linux | 6.1.4-1 | DEBIAN-CVE-2022-4129 |
| Debian:14 | linux | 6.1.4-1 | DEBIAN-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux | 5.15.0-70.77 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux | 5.15.0-70.77 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | 5.19.0-1012.12~22.04.1 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1034.38 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1034.38 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1036.43 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1036.43 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | 5.19.0-1026.29~22.04.1 | USN-6079-1 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | 5.19.0-1026.29~22.04.1 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1036.43.1 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1036.43.1 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1032.40 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1032.40 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | 5.19.0-1024.26~22.04.1 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1031.36 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1031.36 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1018.23 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1018.23 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 5.19.0-42.43~22.04.1 | USN-6096-1 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 5.19.0-42.43~22.04.1 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1028.31 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1028.31 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1028.33 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1028.33 | USN-6057-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1031.36 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1031.36 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-70.77 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-70.77 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | 5.19.0-1024.25~22.04.1 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1023.23 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1033.39 | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1033.39 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1027.29 | USN-6025-1 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1027.29 | UBUNTU-CVE-2022-4129 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2022-4129 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2022-4129 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | Linux kernel (l2tp) | up to v6.0 |
Weakness: CWE-667 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://lore.kernel.org/all/20221114191619.124659-1-jakub%40cloudflare.com/t
- https://lore.kernel.org/netdev/20221121085426.21315-1-jakub%40cloudflare.com/t
- FEDORA-2022-e4460c41bc vendor-advisory
- FEDORA-2022-b36cd53dca vendor-advisory
- FEDORA-2022-24041b1667 vendor-advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html