Description
In the Linux kernel, the following vulnerability has been resolved:
scsi: ufs: core: Fix data race in CPU latency PM QoS request handling
The cpu_latency_qos_add/remove/update_request interfaces lack internal
synchronization by design, requiring the caller to ensure thread safety.
The current implementation relies on the 'pm_qos_enabled' flag, which is
insufficient to prevent concurrent access and cannot serve as a proper
synchronization mechanism. This has led to data races and list
corruption issues.
A typical race condition call trace is:
[Thread A]
ufshcd_pm_qos_exit()
--> cpu_latency_qos_remove_request()
--> cpu_latency_qos_apply();
--> pm_qos_update_target()
--> plist_del <--(1) delete plist node
--> memset(req, 0, sizeof(*req));
--> hba->pm_qos_enabled = false;
[Thread B]
ufshcd_devfreq_target
--> ufshcd_devfreq_scale
--> ufshcd_scale_clks
--> ufshcd_pm_qos_update <--(2) pm_qos_enabled is true
--> cpu_latency_qos_update_request
--> pm_qos_update_target
--> plist_del <--(3) plist node use-after-free
Introduces a dedicated mutex to serialize PM QoS operations, preventing
data races and ensuring safe access to PM QoS resources, including sysfs
interface reads.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.9 | 6.12.114 |
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 | 6.17.6-1 | — |
| Debian 13 | linux | 6.12.115-2 | — |
| Debian 12 | linux-6.12 | 6.12.115-2~deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | linux | 6.17.0-14.14 | USN-8029-1 |
| Ubuntu 25.10 | linux-aws +2 | 6.17.0-1007.7 | USN-8030-1, USN-8029-2 |
| Ubuntu 25.10 | linux-azure +1 | 6.17.0-1008.8 | USN-8029-3, USN-8029-1 |
| Ubuntu 25.10 | linux-azure-fde | No fix yet | — |
| Ubuntu 25.10 | linux-realtime | 6.17.0-1006.7 | USN-8029-1 |
| Ubuntu 25.10 | linux-riscv | 6.17.0-14.14.1 | — |
| Ubuntu 24.04 LTS | linux-aws-6.17 +1 | 6.17.0-1007.7~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-gcp-6.17 | 6.17.0-1008.8~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-nvidia-6.17 | 6.17.0-1008.8 | — |
| Ubuntu 24.04 LTS | linux-oem-6.17 | 6.17.0-1011.11 | USN-8048-1 |
| Ubuntu 24.04 LTS | linux-riscv +18 | No fix yet | — |
| 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 | — |
Show 2 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-realtime-6.14 | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime-6.17 | 6.17.0-1006.7~24.04.1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | kernel-64kb +8 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 |
| SLES for SAP 16.0 | kernel-default-base | 6.12.0-160000.9.1.160000.2.6 | SUSE-SU-2026:20220-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_0 | 7-160000.4.3 | SUSE-SU-2026:20635-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_1 | 5-160000.1.1 | SUSE-SU-2026:20636-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_2 | 3-160000.1.1 | SUSE-SU-2026:20634-1 |
| SLES for SAP 16.0 | kernel-livepatch-SLE16_Update_3 | 2-160000.1.1 | SUSE-SU-2026:20637-1 |
| SLES 16.0 | kernel-64kb +8 | 6.12.0-160000.9.1 | SUSE-SU-2026:20228-1, SUSE-SU-2026:20220-1 |
| SLES 16.0 | kernel-default-base | 6.12.0-160000.9.1.160000.2.6 | SUSE-SU-2026:20220-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_0 | 7-160000.4.3 | SUSE-SU-2026:20635-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_1 | 5-160000.1.1 | SUSE-SU-2026:20636-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_2 | 3-160000.1.1 | SUSE-SU-2026:20634-1 |
| SLES 16.0 | kernel-livepatch-SLE16_Update_3 | 2-160000.1.1 | SUSE-SU-2026:20637-1 |
| SLE Micro 6.2 | kernel-default-base | 6.12.0-160000.9.1.160000.2.6 | SUSE-SU-2026:20207-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_0 | 7-160000.4.3 | SUSE-SU-2026:20644-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_1 | 5-160000.1.1 | SUSE-SU-2026:20646-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_2 | 3-160000.1.1 | SUSE-SU-2026:20643-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16_Update_3 | 2-160000.1.1 | SUSE-SU-2026:20648-1 |
| SLE Micro 6.2 | kernel-rt +5 | 6.12.0-160000.9.1 | SUSE-SU-2026:20564-1, SUSE-SU-2026:20207-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | kernel-default-base | 6.12.0-160000.9.1.160000.2.6 | openSUSE-SU-2026:20145-1 |
| openSUSE Leap 16.0 | kernel-rt +11 | 6.12.0-160000.9.1 | openSUSE-SU-2026:20145-1 |
Advisories 19
- WID-SEC-2025-2579 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- USN-8029-2 linux-aws, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8048-1 linux-oem-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8029-3 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8030-1 linux-gcp vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-8029-1 linux, linux-raspi, linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- SUSE-SU-2026:20564-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Jul 9, 2026
- openSUSE-SU-2026:20145-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20646-1 Security update for the Linux Kernel (Live Patch 1 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20648-1 Security update for the Linux Kernel (Live Patch 3 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20643-1 Security update for the Linux Kernel (Live Patch 2 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-2026:20634-1 Security update for the Linux Kernel (Live Patch 2 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-2026:20636-1 Security update for the Linux Kernel (Live Patch 1 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20637-1 Security update for the Linux Kernel (Live Patch 3 for SUSE Linux Enterprise 16) SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20228-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20220-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20207-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026