Description
In the Linux kernel, the following vulnerability has been resolved:
x86/mm: Fix pti_clone_pgtable() alignment assumption
Guenter reported dodgy crashes on an i386-nosmp build using GCC-11
that had the form of endless traps until entry stack exhaust and then
#DF from the stack guard.
It turned out that pti_clone_pgtable() had alignment assumptions on
the start address, notably it hard assumes start is PMD aligned. This
is true on x86_64, but very much not true on i386.
These assumptions can cause the end condition to malfunction, leading
to a 'short' clone. Guess what happens when the user mapping has a
short copy of the entry text?
Use the correct increment form for addr to avoid alignment
assumptions.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 4.19 | 4.19.320 |
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 | 6.10.6-1 | — |
| Debian 13 | linux | 6.10.6-1 | — |
| Debian 12 | linux | 6.1.106-1 | — |
| Debian 11 | linux | 5.10.226-1 | DLA-3912-1 |
| Debian 11 | linux-6.1 | 6.1.119-1~deb11u1 | DLA-4008-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1056.58 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-50.51 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1020.22 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1020.23 | USN-7196-1 |
| Ubuntu 24.04 LTS | linux-gcp +1 | 6.8.0-1019.21 | USN-7155-1, USN-7154-1 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1015.19 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-gkeop | 6.8.0-1002.4 | USN-7156-1 |
| Ubuntu 24.04 LTS | linux-ibm | 6.8.0-1017.17 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1019.21.1 | USN-7155-1 |
| Ubuntu 24.04 LTS | linux-oem-6.8 | 6.8.0-1018.18 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-oracle +1 | 6.8.0-1017.18 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1016.18 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-riscv +1 | 6.8.0-50.51.1 | USN-7154-1 |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-125.135 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1072.78 | USN-7100-2 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1020.22~22.04.1 | USN-7154-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1075.84 | USN-7123-1 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1020.23~22.04.1 | USN-7196-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1076.85.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1071.79 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 +1 | 6.8.0-1019.21~22.04.1 | USN-7155-1, USN-7154-1 |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1069.75 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1055.62 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 | 6.8.0-50.51~22.04.1 | USN-7154-2 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1065.68 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 | 6.8.0-1017.17~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1067.73 | USN-7144-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1069.74 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1067.68 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1032.32 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1020.20 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1070.76 | USN-7100-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1017.18~22.04.1 | USN-7154-1 |
| Ubuntu 22.04 LTS | linux-riscv +31 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.8 +1 | 6.8.0-50.51.1~22.04.1 | USN-7154-1 |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1038.42 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux | 5.4.0-200.220 | USN-7088-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1135.145 | USN-7088-4 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1072.78~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1140.147 | USN-7088-2 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1078.87~20.04.1 | USN-7194-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1095.102 | USN-7088-2 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1139.148 | USN-7088-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1071.79~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1102.106 | USN-7088-1 |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1055.62~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-125.135~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1082.87 | USN-7088-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1065.68~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1067.73~20.04.1 | USN-7144-1 |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1044.45 | USN-7119-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1123.131 | USN-7088-4 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1032.32~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1134.143 | USN-7088-4 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1070.76~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1119.131 | USN-7088-5 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1068.72~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-xilinx-zynqmp | 5.4.0-1054.58 | USN-7088-4 |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 13 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 24.04 LTS | linux-raspi-realtime | 6.8.0-2015.16 | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1013.14 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1066.68 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1073.81 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1013.14~22.04.1 | — |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-fips | 6.8.0-78.78+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-aws-fips | 5.15.0-1072.78+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1075.84+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-125.135+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1071.79+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1135.145+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1140.147+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1109.119 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1139.148+fips1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux +5 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 | 5.4.0-1135.145~18.04.1 | USN-7088-3 |
| Ubuntu Pro 18.04 LTS | linux-azure-5.4 | 5.4.0-1140.147~18.04.1 | USN-7088-4 |
| Ubuntu Pro 18.04 LTS | linux-gcp-5.4 | 5.4.0-1139.148~18.04.1 | USN-7088-1 |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-200.220~18.04.1 | USN-7088-1 |
| Ubuntu Pro 18.04 LTS | linux-ibm-5.4 | 5.4.0-1082.87~18.04.1 | USN-7088-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle-5.4 | 5.4.0-1134.143~18.04.1 | USN-7088-3 |
| Ubuntu Pro 18.04 LTS | linux-raspi-5.4 | 5.4.0-1119.131~18.04.1 | USN-7088-5 |
| Ubuntu Pro 16.04 LTS | linux-gcp +4 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-azure | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bpftool | 7.4.0-503.11.1.el9_5 | RHSA-2024:9315 |
| RHEL 9 | rv +67 | 5.14.0-503.11.1.el9_5 | RHSA-2024:9315 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | kernel-64kb +4 | 6.4.0-150600.23.25.1 | SUSE-SU-2024:3561-1 |
| SLES 15 SP6 | kernel-azure +2 | 6.4.0-150600.8.14.1 | SUSE-SU-2024:3551-1 |
| SLES 15 SP6 | kernel-coco +3 | 6.4.0-15061.6.coco15sp6.1 | SUSE-SU-2024:3553-1 |
| SLES 15 SP6 | kernel-default-base | 6.4.0-150600.23.25.1.150600.12.10.2 | SUSE-SU-2024:3561-1 |
| SLES 15 SP6 | kernel-docs +1 | 6.4.0-150600.23.25.2 | SUSE-SU-2024:3561-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.0 | kernel-default-base | 6.4.0-17.1.1.51 | SUSE-SU-2025:20073-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_3 +1 | 1-1.2 | SUSE-SU-2025:20077-1, SUSE-SU-2025:20073-1 |
| SLE Micro 6.0 | kernel-rt +1 | 6.4.0-11.1 | SUSE-SU-2025:20077-1 |
| SLE Micro 6.0 | kernel-source +2 | 6.4.0-20.1 | SUSE-SU-2025:20073-1 |
| SLE Live Patching 15 SP6 | kernel-default | 6.4.0-150600.23.25.1 | SUSE-SU-2024:3561-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_4 | 1-150600.1.3.1 | SUSE-SU-2024:3564-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_5 | 1-150600.13.3.1 | SUSE-SU-2024:3561-1 |
| SUSE Real Time Module 15 SP6 | kernel-rt +3 | 6.4.0-150600.10.14.1 | SUSE-SU-2024:3564-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | dtb-aarch64 +8 | 6.4.0-150600.23.25.1 | SUSE-SU-2024:3561-1 |
| openSUSE Leap 15.6 | kernel-azure +2 | 6.4.0-150600.8.14.1 | SUSE-SU-2024:3551-1 |
| openSUSE Leap 15.6 | kernel-default-base | 6.4.0-150600.23.25.1.150600.12.10.2 | SUSE-SU-2024:3561-1 |
| openSUSE Leap 15.6 | kernel-docs +1 | 6.4.0-150600.23.25.2 | SUSE-SU-2024:3561-1 |
| openSUSE Leap 15.6 | kernel-rt +3 | 6.4.0-150600.10.14.1 | SUSE-SU-2024:3564-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.106-116.188 | 1.0-0.amzn2023 | ALAS2023-2025-864 |
| Amazon Linux 2023 | perf +14 | 6.1.106-116.188.amzn2023 | ALAS2023-2025-864 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | bpftool | 7.4.0-503.11.1.el9_5 | ELSA-2024-9315 |
| Oracle Linux 9 | rv +28 | 5.14.0-503.11.1.el9_5 | ELSA-2024-9315 |
| Oracle Linux 8 | bpftool +13 | 5.15.0-302.167.6.el9uek | ELSA-2024-12815 |
| Oracle Linux 7 | kernel-uek +6 | 5.4.17-2136.336.5.1.el8uek | ELSA-2024-12782, ELSA-2024-12780 |
| Oracle Linux 7 | perf +3 | 5.4.17-2136.336.5.1.el7uek | ELSA-2024-12780 |
Advisories 35
- USN-7100-1 linux, linux-aws-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle, linux-oracle-5.15, linux-raspi, linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7154-1 linux, linux-aws, linux-aws-6.8, linux-gcp, linux-gcp-6.8, linux-gke, linux-ibm, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-oem-6.8, linux-oracle, linux-oracle-6.8, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7088-1 linux, linux-gcp, linux-gcp-5.4, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7088-4 linux-aws, linux-azure-5.4, linux-kvm, linux-oracle, linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7155-1 linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7144-1 linux-intel-iotg, linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7194-1 linux-azure-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7088-5 linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7196-1 linux-azure, linux-azure-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7088-3 linux-aws-5.4, linux-oracle-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7088-2 linux-azure, linux-bluefield vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7156-1 linux-gkeop vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7100-2 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7123-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7119-1 linux-iot vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7154-2 linux-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- RHSA-2024:9315 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2024-2057 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service oder unspezifischer Angriff BSI CERT-Bund (WID) · Sep 28, 2026
- ALAS2023-2025-864 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 24, 2026
- SUSE-SU-2025:20073-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20077-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4008-1 linux-6.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3912-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ICSA-25-226-07 Siemens Third-Party Components in SINEC OS CISA ICS & IT advisories · Feb 25, 2026
- SSA-355557 SSA-355557: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.2 Siemens ProductCERT · Feb 24, 2026
- SUSE-SU-2024:3551-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3561-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3564-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3553-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- ELSA-2024-9315 Moderate: kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 14, 2024
- ELSA-2024-12815 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 11, 2024
- ELSA-2024-12782 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 14, 2024
- ELSA-2024-12780 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 11, 2024
References
- https://git.kernel.org/stable/c/18da1b27ce16a14a9b636af9232acb4fb24f4c9e
- https://git.kernel.org/stable/c/25a727233a40a9b33370eec9f0cad67d8fd312f8
- https://git.kernel.org/stable/c/d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6
- https://git.kernel.org/stable/c/4d143ae782009b43b4f366402e5c37f59d4e4346
- https://git.kernel.org/stable/c/5c580c1050bcbc15c3e78090859d798dcf8c9763
- https://git.kernel.org/stable/c/ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed
- https://git.kernel.org/stable/c/df3eecb5496f87263d171b254ca6e2758ab3c35c
- https://git.kernel.org/stable/c/41e71dbb0e0a0fe214545fe64af031303a08524c