Description
In the Linux kernel, the following vulnerability has been resolved:
iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()
Resolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index()
where shifting the constant "1" (of type int) by bitmap->mapped.pgshift
(an unsigned long value) could result in undefined behavior.
The constant "1" defaults to a 32-bit "int", and when "pgshift" exceeds
31 (e.g., pgshift = 63) the shift operation overflows, as the result
cannot be represented in a 32-bit type.
To resolve this, the constant is updated to "1UL", promoting it to an
unsigned long type to match the operand's type.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.1 | 6.1.129 |
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 | 6.12.13-1 | — |
| Debian 13 | linux | 6.12.13-1 | — |
| Debian 12 | linux | 6.1.129-1 | — |
| Debian 11 | linux-6.1 | 6.1.129-1~deb11u1 | DLA-4102-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux | 6.8.0-64.67 | USN-7651-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1032.34 | USN-7651-1 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1034.39 | USN-7737-1 |
| Ubuntu 24.04 LTS | linux-azure-nvidia | 6.8.0-1022.23 | USN-7737-1 |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1033.35 | USN-7651-4 |
| Ubuntu 24.04 LTS | linux-gcp-6.11 +1 | 6.11.0-1015.15~24.04.1 | USN-7521-1 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1028.32 | USN-7651-3 |
| Ubuntu 24.04 LTS | linux-gkeop | 6.8.0-1015.17 | USN-7651-3 |
| Ubuntu 24.04 LTS | linux-hwe-6.11 | 6.11.0-26.26~24.04.1 | USN-7521-1 |
| Ubuntu 24.04 LTS | linux-ibm | 6.8.0-1029.29 | USN-7651-2 |
| Ubuntu 24.04 LTS | linux-lowlatency | 6.8.0-64.67.1 | USN-7651-2 |
| Ubuntu 24.04 LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1014.15~24.04.1 | USN-7521-3 |
| Ubuntu 24.04 LTS | linux-nvidia | 6.8.0-1031.34 | USN-7651-3 |
| Ubuntu 24.04 LTS | linux-nvidia-6.11 | 6.11.0-1010.10 | — |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1031.34.1 | USN-7651-3 |
| Ubuntu 24.04 LTS | linux-nvidia-tegra | 6.8.0-1008.8 | — |
| Ubuntu 24.04 LTS | linux-oem-6.11 | 6.11.0-1022.22 | USN-7521-1 |
| Ubuntu 24.04 LTS | linux-oem-6.8 | 6.8.0-1031.31 | USN-7651-1 |
| Ubuntu 24.04 LTS | linux-oracle | 6.8.0-1029.30 | USN-7651-3 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1031.35 | USN-7651-6 |
| Ubuntu 24.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 24.04 LTS | linux-xilinx | 6.8.0-1017.18 | — |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1032.34~22.04.1 | USN-7651-3 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1034.39~22.04.1 | USN-7737-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 | 6.8.0-1033.35~22.04.1 | USN-7651-4 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 +1 | 6.8.0-64.67~22.04.1 | USN-7653-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 | 6.8.0-1029.29~22.04.1 | USN-7651-2 |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-6.8 | 6.8.0-64.67.1~22.04.1 | USN-7651-2 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1031.34~22.04.1 | USN-7651-3 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1029.30~22.04.1 | USN-7651-3 |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro Realtime 24.04 LTS | linux-raspi-realtime | 6.8.0-2026.27 | USN-7651-5 |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1025.26 | USN-7652-1 |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1025.26~22.04.1 | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-fips | 6.8.0-78.78+fips1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | bpftool | 7.3.0-427.107.1.el9_4 | RHSA-2026:0917 |
| RHEL 9.4 EUS | rv +64 | 5.14.0-427.107.1.el9_4 | RHSA-2026:0917 |
| RHEL 9.2 E4S | bpftool | 7.0.0-284.154.1.el9_2 | RHSA-2026:1441 |
| RHEL 9.2 E4S | kernel-rt +14 | 5.14.0-284.154.1.rt14.439.el9_2 | RHSA-2026:1443 |
| RHEL 9.2 E4S | perf +47 | 5.14.0-284.154.1.el9_2 | RHSA-2026:1441 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | kernel-64kb +3 | 6.4.0-150600.23.42.2 | SUSE-SU-2025:0856-1 |
| SLES 15 SP6 | kernel-azure +2 | 6.4.0-150600.8.31.1 | SUSE-SU-2025:0847-1 |
| SLES 15 SP6 | kernel-coco +3 | 6.4.0-15061.21.coco15sp6.1 | SUSE-SU-2025:01919-1 |
| SLES 15 SP6 | kernel-default-base | 6.4.0-150600.23.42.2.150600.12.18.4 | SUSE-SU-2025:0856-1 |
| SLES 15 SP6 | kernel-docs +2 | 6.4.0-150600.23.42.1 | SUSE-SU-2025:0856-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.1 | kernel-default-base | 6.4.0-28.1.21.6 | SUSE-SU-2025:20270-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0_Update_6 +1 | 1-3.1 | SUSE-SU-2025:20270-1, SUSE-SU-2025:20260-1 |
| SLE Micro 6.1 | kernel-rt +4 | 6.4.0-28.1 | SUSE-SU-2025:20270-1, SUSE-SU-2025:20260-1 |
| SLE Micro 6.0 | kernel-default-base | 6.4.0-28.1.21.6 | SUSE-SU-2025:20192-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_6 +1 | 1-3.1 | SUSE-SU-2025:20192-1, SUSE-SU-2025:20190-1 |
| SLE Micro 6.0 | kernel-rt +4 | 6.4.0-28.1 | SUSE-SU-2025:20192-1, SUSE-SU-2025:20190-1 |
| SLE Live Patching 15 SP6 | kernel-default | 6.4.0-150600.23.42.2 | SUSE-SU-2025:0856-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_9 | 1-150600.1.3.2 | SUSE-SU-2025:0955-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_9 | 1-150600.13.3.4 | SUSE-SU-2025:0856-1 |
| SUSE Real Time Module 15 SP6 | kernel-rt +3 | 6.4.0-150600.10.29.1 | SUSE-SU-2025:0955-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | dtb-aarch64 +4 | 6.4.0-150600.23.42.1 | SUSE-SU-2025:0856-1 |
| openSUSE Leap 15.6 | kernel-64kb +5 | 6.4.0-150600.23.42.2 | SUSE-SU-2025:0856-1 |
| openSUSE Leap 15.6 | kernel-azure +2 | 6.4.0-150600.8.31.1 | SUSE-SU-2025:0847-1 |
| openSUSE Leap 15.6 | kernel-default-base | 6.4.0-150600.23.42.2.150600.12.18.4 | SUSE-SU-2025:0856-1 |
| openSUSE Leap 15.6 | kernel-rt +3 | 6.4.0-150600.10.29.1 | SUSE-SU-2025:0955-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.129-138.220 | 1.0-0.amzn2023 | ALAS2023-2025-876 |
| Amazon Linux 2023 | perf +14 | 6.1.129-138.220.amzn2023 | ALAS2023-2025-876 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | kernel-uek +34 | 6.12.0-101.33.4.3.el10uek | ELSA-2025-20530, ELSA-2025-20480 |
| Oracle Linux 8 | bpftool +18 | 5.15.0-320.202.8.2.el9uek | ELSA-2026-50261 |
Advisories 35
- RHSA-2026:1441 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- WID-SEC-2025-0453 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- USN-7737-1 linux-azure, linux-azure-6.8, linux-azure-nvidia vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7653-1 linux-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7651-3 linux-aws-6.8, linux-gke, linux-gkeop, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency, linux-oracle, linux-oracle-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7651-2 linux-ibm, linux-ibm-6.8, linux-lowlatency, linux-lowlatency-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7651-4 linux-gcp, linux-gcp-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7651-6 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7651-5 linux-raspi-realtime vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7652-1 linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7521-1 linux, linux-azure, linux-azure-6.11, linux-gcp, linux-gcp-6.11, linux-hwe-6.11, linux-oem-6.11, linux-raspi, linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7521-3 linux-lowlatency, linux-lowlatency-hwe-6.11, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7651-1 linux, linux-aws, linux-oem-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- ICSA-26-295-16 Siemens SIMATIC S7-1500 TM MFP CISA ICS & IT advisories · Oct 22, 2026
- WID-SEC-2026-3891 Siemens SIMATIC S7: Mehrere Schwachstelle BSI CERT-Bund (WID) · Oct 18, 2026
- SSA-082556 SSA-082556: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.5 Siemens ProductCERT · Oct 13, 2026
- SSA-784472 SSA-784472: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP V1.1.1 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2025-1439 Dell Secure Connect Gateway: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 11, 2026
- RHSA-2026:1443 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:0917 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jul 30, 2026
- ICSA-25-162-05 Siemens SIMATIC S7-1500 CPU family CISA ICS & IT advisories · May 14, 2026
- ELSA-2026-50261 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 10, 2026
- SUSE-SU-2025:20270-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20192-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20260-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20190-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4102-1 linux-6.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:01919-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0856-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0955-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0847-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2025-876 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 2, 2025
- ELSA-2025-20530 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 18, 2025
- ELSA-2025-20480 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 17, 2025
- NCSC-2025-0187 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Jun 10, 2025
References
- https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3
- https://git.kernel.org/stable/c/38ac76fc06bc6826a3e4b12a98efbe98432380a9
- https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfe
- https://git.kernel.org/stable/c/b1f8453b8ff1ab79a03820ef608256c499769cb6
- https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9c