Description
A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data to userspace.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
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 | 6.4.13-1 | — |
| Debian 13 | linux | 6.4.13-1 | — |
| Debian 12 | linux | 6.1.52-1 | DSA-5492-1 |
| Debian 10 | linux-5.10 | 5.10.197-1~deb10u1 | DLA-3623-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1033.35 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-91.101 | USN-6549-3, USN-6549-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1051.56 | USN-6549-1 |
| Ubuntu 22.04 LTS | linux-aws-6.2 | 6.2.0-1017.17~22.04.1 | USN-6534-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1053.61 | USN-6549-1 |
| Ubuntu 22.04 LTS | linux-azure-6.2 +1 | 6.2.0-1018.18~22.04.1 | USN-6534-3, USN-6534-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1053.61.1 | USN-6549-1 |
| Ubuntu 22.04 LTS | linux-azure-fde-6.2 | 6.2.0-1018.18~22.04.1.1 | USN-6534-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1048.56 | USN-6549-1 |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1048.53 | USN-6549-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1034.40 | USN-6549-2 |
| Ubuntu 22.04 LTS | linux-hwe-6.2 | 6.2.0-39.40~22.04.1 | USN-6534-3 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1044.47 | USN-6549-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1046.52 | USN-6549-4 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1042.42 | USN-6549-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.2 | 6.2.0-1013.13 | USN-6534-3 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1020.20 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1007.7 | — |
| Ubuntu 22.04 LTS | linux-oem-6.1 | 6.1.0-1023.23 | USN-6415-1 |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1049.55 | USN-6549-1 |
| Ubuntu 22.04 LTS | linux-riscv +14 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1027.31 | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1051.56~20.04.1 | USN-6549-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1053.61~20.04.1 | USN-6549-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1053.61~20.04.1.1 | USN-6549-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1048.56~20.04.1 | USN-6549-5 |
| Ubuntu 20.04 LTS | linux-gke +25 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1034.40~20.04.1 | USN-6549-2 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-91.101~20.04.1 | USN-6549-3, USN-6549-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1044.47~20.04.1 | USN-6549-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1046.52~20.04.1 | USN-6549-5 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1020.20~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1049.55~20.04.1 | USN-6549-1 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1047.51~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1044.46 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1052.58 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bpftool | 7.2.0-362.8.1.el9_3 | RHSA-2023:6583 |
| RHEL 9 | rv +64 | 5.14.0-362.8.1.el9_3 | RHSA-2023:6583 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.49-69.116 | 1.0-0.amzn2023 | ALAS2023-2023-330 |
| Amazon Linux 2023 | perf +12 | 6.1.49-69.116.amzn2023 | ALAS2023-2023-330 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | hyperv-daemons | 5.15.158.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | bpftool | 7.2.0-362.8.1.el9_3 | ELSA-2023-6583 |
| Oracle Linux 9 | rv +25 | 5.14.0-362.8.1.el9_3 | ELSA-2023-6583 |
Advisories 21
- WID-SEC-2025-2194 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- WID-SEC-2025-2920 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 5, 2026
- USN-6549-1 linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15, linux-gcp, linux-gke, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-kvm, linux-nvidia, linux-oracle, linux-oracle-5.15, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6549-5 linux-gcp-5.15, linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6534-1 linux, linux-aws, linux-aws-6.2, linux-azure, linux-azure-6.2, linux-azure-fde-6.2, linux-lowlatency, linux-oracle, linux-raspi, linux-starfive vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6534-3 linux-hwe-6.2, linux-lowlatency-hwe-6.2, linux-nvidia-6.2 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6549-2 linux-gkeop, linux-gkeop-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6549-3 linux-lowlatency, linux-lowlatency-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6549-4 linux-intel-iotg vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6415-1 linux-oem-6.1 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- WID-SEC-2025-2229 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- WID-SEC-2025-2187 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2023:6583 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- SSA-794697 SSA-794697: Vulnerabilities in the Additional GNU/Linux Subsystem of the SIMATIC S7-1500 TM MFP Before V1.1 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2023-1882 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 11, 2026
- DSA-5492-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3623-1 linux-5.10 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ALAS2023-2023-330 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 11, 2026
- WID-SEC-2025-1293 IBM DataPower Gateway: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 3, 2025
- ICSA-23-166-11 Siemens SIMATIC S7-1500 TM MFP Linux Kernel CISA ICS & IT advisories · Apr 9, 2024
- ELSA-2023-6583 Important: kernel security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 12, 2023
References
- RHSA-2023:6583 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2023-3773 vdb-entry
- RHBZ#2218944 issue-tracking