Description
In the Linux kernel, the following vulnerability has been resolved:
io_uring/futex: ensure io_futex_wait() cleans up properly on failure
The io_futex_data is allocated upfront and assigned to the io_kiocb
async_data field, but the request isn't marked with REQ_F_ASYNC_DATA
at that point. Those two should always go together, as the flag tells
io_uring whether the field is valid or not.
Additionally, on failure cleanup, the futex handler frees the data but
does not clear ->async_data. Clear the data and the flag in the error
path as well.
Thanks to Trend Micro Zero Day Initiative and particularly ReDress for
reporting this.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.7 | 6.12.44 |
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 | 6.16.5-1 | — |
| Debian 13 | linux | 6.12.48-1 | DSA-6008-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 24.04 LTS | linux-bluefield | 6.8.0-1016.20 | — |
| Ubuntu 25.10 | linux-azure-fde | No fix yet | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-94.96 | USN-8015-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1045.47 | USN-8015-4 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1046.52 | USN-8074-1 |
| Ubuntu 24.04 LTS | linux-azure-fde | 6.8.0-1046.53 | — |
| Ubuntu 24.04 LTS | linux-azure-nvidia | 6.8.0-1039.42 | — |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1046.49 | USN-8015-4 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1042.47 | USN-8015-1 |
| Ubuntu 24.04 LTS | linux-gkeop | 6.8.0-1029.32 | USN-8015-1 |
| Ubuntu 24.04 LTS | linux-ibm | 6.8.0-1043.43 | USN-8015-4 |
| Ubuntu 24.04 LTS | linux-intel +19 | No fix yet | — |
| Ubuntu 24.04 LTS | linux-lowlatency | 6.8.0-94.96.1 | USN-8015-5 |
| Ubuntu 24.04 LTS | linux-nvidia | 6.8.0-1045.48 | USN-8016-1 |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1045.48.1 | USN-8016-1 |
| Ubuntu 24.04 LTS | linux-nvidia-tegra | 6.8.0-1020.20 | — |
| Ubuntu 24.04 LTS | linux-oracle | 6.8.0-1042.43 | USN-8015-1 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1045.49 | USN-8015-1 |
| Ubuntu 24.04 LTS | linux-xilinx | 6.8.0-1022.23 | USN-8015-5 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1045.47~22.04.1 | USN-8015-4 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1051.57~22.04.1 | USN-8126-1 |
| Ubuntu 22.04 LTS | linux-azure-fde-6.8 | 6.8.0-1046.53~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-gcp-6.8 | 6.8.0-1046.49~22.04.1 | USN-8015-4 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 +1 | 6.8.0-94.96~22.04.1 | USN-8015-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 | 6.8.0-1043.43~22.04.1 | USN-8015-4 |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-6.8 | 6.8.0-94.96.1~22.04.1 | USN-8015-4 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1045.48~22.04.1 | USN-8016-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1042.43~22.04.1 | USN-8015-1 |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-raspi-realtime | 6.8.0-2036.37 | USN-8015-2 |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1040.41 | USN-8015-2 |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime-6.14 | No fix yet | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1040.41~22.04.1 | USN-8015-2 |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-aws-fips | 6.8.0-1045.47+fips1 | USN-8015-3 |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-azure-fips | 6.8.0-1046.52+fips1 | USN-8074-2 |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-fips | 6.8.0-94.96+fips1 | USN-8015-3 |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-gcp-fips | 6.8.0-1046.49+fips1 | USN-8015-3 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | rv +77 | 6.12.0-55.37.1.el10_0 | RHSA-2025:16904 |
| RHEL 9 | rv +77 | 5.14.0-570.49.1.el9_6 | RHSA-2025:16880 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | kernel-doc +1 | 6.12.0-55.37.1.el10_0 | ALSA-2025:16904 |
| AlmaLinux 9 | rv +75 | 5.14.0-570.49.1.el9_6 | ALSA-2025:16880 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | kernel | 6.12.0-55.37.1.el10_0 | RLSA-2025:16904 |
| Rocky Linux 9 | kernel | 5.14.0-570.49.1.el9_6 | RLSA-2025:16880 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | kernel-64kb +7 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 |
| SLES for SAP 16.0 | kernel-default-base | 6.12.0-160000.6.1.160000.2.4 | SUSE-SU-2025:21139-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_0 | 7-160000.4.3 | SUSE-SU-2026:20635-1 |
| SLES 16.0 | kernel-64kb +7 | 6.12.0-160000.6.1 | SUSE-SU-2025:21179-1, SUSE-SU-2025:21139-1 |
| SLES 16.0 | kernel-default-base | 6.12.0-160000.6.1.160000.2.4 | SUSE-SU-2025:21139-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_0 | 7-160000.4.3 | SUSE-SU-2026:20635-1 |
| SLE Micro 6.2 | kernel-default-base | 6.12.0-160000.6.1.160000.2.4 | SUSE-SU-2025:21074-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16-RT_Update_0 | 5-160000.3.4 | SUSE-SU-2026:20645-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_0 | 7-160000.4.3 | SUSE-SU-2026:20644-1 |
| SLE Micro 6.2 | kernel-rt +5 | 6.12.0-160000.6.1 | SUSE-SU-2026:20560-1, SUSE-SU-2025:21074-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | kernel-default-base | 6.12.0-160000.6.1.160000.2.4 | openSUSE-SU-2025:20081-1 |
| openSUSE Leap 16.0 | kernel-rt +10 | 6.12.0-160000.6.1 | openSUSE-SU-2025:20081-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.12.46-66.121 | 1:1.0-0.amzn2023 | ALAS2023-2025-1208 |
| Amazon Linux 2023 | perf6.12 +14 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | rv +28 | 6.12.0-55.37.1.0.1.el10_0 | ELSA-2025-16904 |
| Oracle Linux 9 | kernel-uek +34 | 6.12.0-103.40.4.4.el10uek | ELSA-2025-25754, ELSA-2025-20719, ELSA-2025-20649 |
| Oracle Linux 9 | rv +28 | 5.14.0-570.49.1.0.1.el9_6 | ELSA-2025-16880 |
Advisories 31
- WID-SEC-2025-1988 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Nov 12, 2026
- USN-8126-1 linux-azure-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8074-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8074-2 linux-azure-fips vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8015-1 linux, linux-gke, linux-gkeop, linux-hwe-6.8, linux-oracle, linux-oracle-6.8, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8016-1 linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8015-3 linux-fips, linux-aws-fips, linux-gcp-fips vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8015-5 linux-lowlatency, linux-xilinx vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8015-2 linux-realtime, linux-realtime-6.8, linux-raspi-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8015-4 linux-aws, linux-aws-6.8, linux-gcp, linux-gcp-6.8, linux-ibm, linux-ibm-6.8, linux-lowlatency-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- ALSA-2025:16880 Moderate: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:16904 Moderate: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:16904 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2025:16880 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Sep 22, 2026
- SUSE-SU-2026:20560-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Jul 9, 2026
- openSUSE-SU-2025:20081-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20645-1 Security update for the Linux Kernel RT (Live Patch 0 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20635-1 Security update for the Linux Kernel (Live Patch 0 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20644-1 Security update for the Linux Kernel (Live Patch 0 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21179-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21139-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21074-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- DSA-6008-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ELSA-2025-25754 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 9, 2025
- ELSA-2025-20719 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 24, 2025
- ALAS2023-2025-1208 Important: kernel6.12 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 18, 2025
- RLSA-2025:16880 Moderate: kernel security update Rocky Linux Security Advisories · Oct 10, 2025
- RLSA-2025:16904 Moderate: kernel security update Rocky Linux Security Advisories · Oct 8, 2025
- ELSA-2025-20649 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 6, 2025
- ELSA-2025-16904 Moderate: kernel security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Oct 1, 2025
- ELSA-2025-16880 Moderate: kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 29, 2025