Description
A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (`CONFIG_VMAP_STACK`).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | kernel | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Fedora | Fedora | — | — |
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 | 6.4.11-1 | — |
| Debian 13 | linux | 6.4.11-1 | — |
| Debian 12 | linux | 6.1.52-1 | DSA-5492-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1027.29 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux | 5.15.0-86.96 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1047.52 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-aws-6.2 | 6.2.0-1013.13~22.04.1 | USN-6412-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1049.56 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-azure-6.2 +1 | 6.2.0-1014.14~22.04.1 | USN-6412-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1049.56.1 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-azure-fde-6.2 | 6.2.0-1014.14~22.04.1.1 | USN-6412-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1044.52 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.2 | 6.2.0-1016.18~22.04.1 | USN-6412-1 |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1044.49 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1030.35 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.2 | 6.2.0-34.34~22.04.1 | USN-6412-1 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1040.43 | USN-6416-3, USN-6416-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1043.49 | USN-6445-1 |
| Ubuntu 22.04 LTS | linux-lowlatency | 5.15.0-86.95 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1037.37 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.2 | 6.2.0-1011.11 | USN-6466-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1018.18 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1005.5 | — |
| Ubuntu 22.04 LTS | linux-oem-6.1 | 6.1.0-1021.21 | USN-6343-1 |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1045.51 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-riscv +12 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1025.29 | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1047.52~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1049.56~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1049.56~20.04.1.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1044.52~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-gke +25 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1030.35~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 | 5.15.0-86.96~20.04.1 | USN-6416-2 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1040.43~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1043.49~20.04.1 | USN-6445-2 |
| Ubuntu 20.04 LTS | linux-lowlatency-hwe-5.15 | 5.15.0-86.95~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1018.18~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1045.51~20.04.1 | USN-6416-2 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1043.47~20.04.1 | — |
| 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 | 5.15.0-1040.42 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1048.54 | — |
| 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 |
| RHEL 8 | kernel-rt +12 | 4.18.0-513.5.1.rt7.307.el8_9 | RHSA-2023:6901 |
| RHEL 8 | perf +26 | 4.18.0-513.5.1.el8_9 | RHSA-2023:7077 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.8 EUS | perf +26 | 4.18.0-477.64.1.el8_8 | RHSA-2024:4740 |
| RHEL 8.6 TUS | perf +17 | 4.18.0-372.107.1.el8_6 | RHSA-2024:3859 |
| RHEL 8.6 E4S | perf +25 | 4.18.0-372.107.1.el8_6 | RHSA-2024:3859 |
| RHEL 8.6 AUS | perf +17 | 4.18.0-372.107.1.el8_6 | RHSA-2024:3859 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | perf +24 | 4.18.0-513.5.1.el8_9 | ALSA-2023:7077 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.31.1 | SUSE-SU-2023:4071-1 |
| SLES 15 SP5 | kernel-azure +2 | 5.14.21-150500.33.20.1 | SUSE-SU-2023:4058-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.31.1.150500.6.13.1 | SUSE-SU-2023:4071-1 |
| SLES 15 SP4 | kernel-64kb +6 | 5.14.21-150400.24.92.1 | SUSE-SU-2023:4072-1 |
| SLES 15 SP4 | kernel-azure +2 | 5.14.21-150400.14.69.1 | SUSE-SU-2023:4057-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.92.1.150400.24.42.1 | SUSE-SU-2023:4072-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 5.5 | kernel-default | 5.14.21-150500.55.31.1 | SUSE-SU-2023:4071-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.31.1.150500.6.13.1 | SUSE-SU-2023:4071-1 |
| SLE Micro 5.5 | kernel-rt | 5.14.21-150500.13.21.1 | SUSE-SU-2023:4035-1 |
| SLE Micro 5.4 | kernel-default | 5.14.21-150400.24.92.1 | SUSE-SU-2023:4072-1 |
| SLE Micro 5.4 | kernel-default-base | 5.14.21-150400.24.92.1.150400.24.42.1 | SUSE-SU-2023:4072-1 |
| SLE Micro 5.4 | kernel-rt | 5.14.21-150400.15.56.1 | SUSE-SU-2023:4093-1 |
| SLE Micro 5.3 | kernel-default | 5.14.21-150400.24.92.1 | SUSE-SU-2023:4072-1 |
| SLE Micro 5.3 | kernel-default-base | 5.14.21-150400.24.92.1.150400.24.42.1 | SUSE-SU-2023:4072-1 |
| SLE Micro 5.3 | kernel-rt | 5.14.21-150400.15.56.1 | SUSE-SU-2023:4093-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.31.1 | SUSE-SU-2023:4071-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_6 +1 | 1-150500.11.3.1 | SUSE-SU-2023:4071-1, SUSE-SU-2023:4035-1 |
| SLE Live Patching 15 SP4 | kernel-default | 5.14.21-150400.24.92.1 | SUSE-SU-2023:4072-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4-RT_Update_14 | 1-150400.1.3.1 | SUSE-SU-2023:4093-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_19 | 1-150400.9.3.1 | SUSE-SU-2023:4072-1 |
| SUSE Real Time Module 15 SP5 | kernel-rt +3 | 5.14.21-150500.13.21.1 | SUSE-SU-2023:4035-1 |
| SUSE Real Time Module 15 SP4 | kernel-rt +3 | 5.14.21-150400.15.56.1 | SUSE-SU-2023:4093-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | dtb-aarch64 +10 | 5.14.21-150500.55.31.1 | SUSE-SU-2023:4071-1 |
| openSUSE Leap 15.5 | kernel-azure +2 | 5.14.21-150500.33.20.1 | SUSE-SU-2023:4058-1 |
| openSUSE Leap 15.5 | kernel-default-base | 5.14.21-150500.55.31.1.150500.6.13.1 | SUSE-SU-2023:4071-1 |
| openSUSE Leap 15.5 | kernel-rt +3 | 5.14.21-150500.13.21.1 | SUSE-SU-2023:4035-1 |
| openSUSE Leap 15.4 | dtb-aarch64 +10 | 5.14.21-150400.24.92.1 | SUSE-SU-2023:4072-2 |
| openSUSE Leap 15.4 | kernel-azure +2 | 5.14.21-150400.14.69.1 | SUSE-SU-2023:4057-1 |
| openSUSE Leap 15.4 | kernel-default-base | 5.14.21-150400.24.92.1.150400.24.42.1 | SUSE-SU-2023:4072-2 |
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 |
| Oracle Linux 8 | perf +19 | 4.18.0-513.5.1.el8_9 | ELSA-2023-7077 |
Advisories 26
- USN-6416-1 linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6445-1 linux-intel-iotg vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6416-2 linux-hwe-5.15, linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6445-2 linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6466-1 linux-nvidia-6.2 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6416-3 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- ALSA-2023:7077 Important: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- USN-6412-1 linux, linux-aws, linux-aws-6.2, linux-azure, linux-azure-6.2, linux-azure-fde-6.2, linux-gcp, linux-gcp-6.2, linux-hwe-6.2, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-6.2, linux-oracle, linux-raspi, linux-starfive vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6343-1 linux-oem-6.1 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- RHSA-2024:4740 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2023:7077 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2023:6583 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2023:6901 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:3859 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- DSA-5492-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2023:4035-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4072-2 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4093-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4057-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4058-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4071-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-1086 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 19, 2025
- SUSE-SU-2023:4072-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-1978 Linux Kernel: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jul 23, 2024
- ELSA-2023-7077 Important: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 17, 2023
- ELSA-2023-6583 Important: kernel security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 12, 2023
References
- https://access.redhat.com/security/cve/CVE-2023-4155 vdb-entry
- RHBZ#2213802 issue-tracking