Description
In the Linux kernel, the following vulnerability has been resolved:
blk-iocost: do not WARN if iocg was already offlined
In iocg_pay_debt(), warn is triggered if 'active_list' is empty, which
is intended to confirm iocg is active when it has debt. However, warn
can be triggered during a blkcg or disk removal, if iocg_waitq_timer_fn()
is run at that time:
WARNING: CPU: 0 PID: 2344971 at block/blk-iocost.c:1402 iocg_pay_debt+0x14c/0x190
Call trace:
iocg_pay_debt+0x14c/0x190
iocg_kick_waitq+0x438/0x4c0
iocg_waitq_timer_fn+0xd8/0x130
__run_hrtimer+0x144/0x45c
__hrtimer_run_queues+0x16c/0x244
hrtimer_interrupt+0x2cc/0x7b0
The warn in this situation is meaningless. Since this iocg is being
removed, the state of the 'active_list' is irrelevant, and 'waitq_timer'
is canceled after removing 'active_list' in ioc_pd_free(), which ensures
iocg is freed after iocg_waitq_timer_fn() returns.
Therefore, add the check if iocg was already offlined to avoid warn
when removing a blkcg or disk.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.4 | 5.10.237 |
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 | 6.8.11-1 | — |
| Debian 13 | linux | 6.8.11-1 | — |
| Debian 12 | linux | 6.1.135-1 | DSA-5907-1 |
| Debian 11 | linux | 5.10.237-1 | DLA-4178-1 |
| Debian 11 | linux-6.1 | 6.1.137-1~deb11u1 | DLA-4193-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1072.74 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-40.40 | USN-6949-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1013.14 | USN-6949-1 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1012.14 | USN-6952-2 |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1012.13 | USN-6949-1 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1008.11 | USN-6949-1 |
| Ubuntu 24.04 LTS | linux-ibm +2 | 6.8.0-1010.10 | USN-6955-1, USN-6952-1, USN-6949-1 |
| Ubuntu 24.04 LTS | linux-nvidia | 6.8.0-1011.11 | USN-6949-1 |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1011.11.1 | USN-6952-1 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1009.10 | USN-6949-2 |
| Ubuntu 24.04 LTS | linux-riscv +1 | 6.8.0-40.40.1 | USN-6949-2 |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-144.157 | USN-7654-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1088.95 | USN-7654-1 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1013.14~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1094.103 | USN-7711-1 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1012.14~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1094.103.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1087.96 | USN-7654-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 | 6.8.0-1012.13~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1085.91 | USN-7654-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1070.78 | USN-7654-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 | 6.8.0-40.40~22.04.3 | — |
| Ubuntu 22.04 LTS | linux-ibm | 5.15.0-1080.83 | USN-7654-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 +1 | 6.8.0-1010.10~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1083.89 | USN-7654-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1084.89 | USN-7654-4 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1082.83 | USN-7654-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1011.11~22.04.1 | USN-6949-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1041.41 | USN-7654-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1030.30 | USN-7654-1 |
| Ubuntu 22.04 LTS | linux-raspi | 5.15.0-1083.86 | USN-7686-1 |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.8 +1 | 6.8.0-40.40.1~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1052.56 | USN-7654-5 |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 10 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 | 6.8.0-2008.8 | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1006.6 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1081.83 | USN-7654-2 |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1088.97 | USN-7654-2 |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1006.6~22.04.1 | — |
| Ubuntu Pro FIPS 20.04 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 | 5.15.0-1088.95+fips1 | USN-7654-3 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1094.103+fips1 | USN-7712-1 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-144.157+fips1 | USN-7654-3 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1087.96+fips1 | USN-7654-3 |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | linux +10 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | linux-aws-5.15 | 5.15.0-1088.95~20.04.1 | USN-7654-1 |
| Ubuntu Pro 20.04 LTS | linux-azure-5.15 | 5.15.0-1094.103~20.04.1 | USN-7712-2 |
| Ubuntu Pro 20.04 LTS | linux-gcp-5.15 | 5.15.0-1087.96~20.04.2 | USN-7654-1 |
| Ubuntu Pro 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-144.157~20.04.1 | USN-7654-1 |
| Ubuntu Pro 20.04 LTS | linux-ibm-5.15 | 5.15.0-1080.83~20.04.1 | USN-7654-1 |
| Ubuntu Pro 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1083.89~20.04.1 | USN-7655-1 |
| Ubuntu Pro 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1041.41~20.04.1 | USN-7654-1 |
| Ubuntu Pro 20.04 LTS | linux-oracle-5.15 | 5.15.0-1085.91~20.04.3 | USN-7654-1 |
| Ubuntu Pro 20.04 LTS | linux-riscv-5.15 | 5.15.0-1083.87~20.04.1 | — |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 +6 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | kernel-64kb +6 | 6.4.0-150600.23.33.1 | SUSE-SU-2025:0154-1 |
| SLES 15 SP6 | kernel-azure +2 | 6.4.0-150600.8.23.1 | SUSE-SU-2025:0117-1 |
| SLES 15 SP6 | kernel-coco +3 | 6.4.0-15061.12.coco15sp6.1 | SUSE-SU-2025:0289-1 |
| SLES 15 SP6 | kernel-default-base | 6.4.0-150600.23.33.1.150600.12.14.1 | SUSE-SU-2025:0154-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.1 | kernel-default-base | 6.4.0-24.1.21.4 | SUSE-SU-2025:20248-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0-RT_Update_5 | 1-1.1 | SUSE-SU-2025:20249-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0_Update_5 | 1-1.2 | SUSE-SU-2025:20248-1 |
| SLE Micro 6.1 | kernel-rt +4 | 6.4.0-25.1 | SUSE-SU-2025:20249-1, SUSE-SU-2025:20248-1 |
| SLE Micro 6.0 | kernel-default-base | 6.4.0-24.1.21.4 | SUSE-SU-2025:20165-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0-RT_Update_5 | 1-1.1 | SUSE-SU-2025:20166-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_5 | 1-1.2 | SUSE-SU-2025:20165-1 |
| SLE Micro 6.0 | kernel-rt +4 | 6.4.0-25.1 | SUSE-SU-2025:20166-1, SUSE-SU-2025:20165-1 |
| SLE Live Patching 15 SP6 | kernel-default | 6.4.0-150600.23.33.1 | SUSE-SU-2025:0154-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_7 | 1-150600.1.3.1 | SUSE-SU-2025:0153-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_7 | 1-150600.13.3.1 | SUSE-SU-2025:0154-1 |
| SUSE Real Time Module 15 SP6 | kernel-rt +3 | 6.4.0-150600.10.23.1 | SUSE-SU-2025:0153-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | dtb-aarch64 +10 | 6.4.0-150600.23.33.1 | SUSE-SU-2025:0154-1 |
| openSUSE Leap 15.6 | kernel-azure +2 | 6.4.0-150600.8.23.1 | SUSE-SU-2025:0117-1 |
| openSUSE Leap 15.6 | kernel-default-base | 6.4.0-150600.23.33.1.150600.12.14.1 | SUSE-SU-2025:0154-1 |
| openSUSE Leap 15.6 | kernel-rt +3 | 6.4.0-150600.10.23.1 | SUSE-SU-2025:0153-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.140-154.222 | 1.0-0.amzn2023 | ALAS2023-2025-1050 |
| Amazon Linux 2023 | perf +14 | 6.1.140-154.222.amzn2023 | ALAS2023-2025-1050 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | bpftool +18 | 5.15.0-310.184.5.2.el9uek | ELSA-2025-20470 |
Advisories 29
- USN-7655-1 linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7654-1 linux, linux-aws, linux-aws-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-intel-iotg, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx, linux-oracle, linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7712-2 linux-azure-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7712-1 linux-azure-fips vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7711-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7686-1 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7654-3 linux-aws-fips, linux-fips, linux-gcp-fips vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7654-2 linux-intel-iot-realtime, linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7654-4 linux-kvm vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7654-5 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6955-1 linux-oem-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6952-2 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6952-1 linux-nvidia-lowlatency, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6949-2 linux-lowlatency, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6949-1 linux, linux-aws, linux-gcp, linux-gke, linux-ibm, linux-nvidia, linux-nvidia-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- WID-SEC-2024-1259 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service und unspezifischen Angriff BSI CERT-Bund (WID) · Oct 7, 2026
- SUSE-SU-2025:20165-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20166-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20248-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20249-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4178-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5907-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4193-1 linux-6.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:0117-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0153-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0154-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0289-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2025-1050 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 26, 2025
- ELSA-2025-20470 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 14, 2025
References
- https://git.kernel.org/stable/c/56a9d07f427378eeb75b917bb49c6fbea8204126
- https://git.kernel.org/stable/c/7d215e013d097ed6fc4b0ad0272c9514214dc408
- https://git.kernel.org/stable/c/aed0aac18f039dd4af13c143063754efca358cb0
- https://git.kernel.org/stable/c/1c172ac7afe4442964f4153b2c78fe4e005d9d67
- https://git.kernel.org/stable/c/14b3275f93d4a0d8ddc02195bc4e9869b7a3700e
- https://git.kernel.org/stable/c/01bc4fda9ea0a6b52f12326486f07a4910666cf6