Description
In the Linux kernel, the following vulnerability has been resolved:
block, bfq: fix uaf for bfqq in bic_set_bfqq()
After commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'"),
bic->bfqq will be accessed in bic_set_bfqq(), however, in some context
bic->bfqq will be freed, and bic_set_bfqq() is called with the freed
bic->bfqq.
Fix the problem by always freeing bfqq after bic_set_bfqq().
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.0.16 – < 6.1, 5.15.86 – < 5.15.93, 6.1.2 – < 6.1.11 | 6.1 |
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 | 6.1.11-1 | — |
| Debian 13 | linux | 6.1.11-1 | — |
| Debian 12 | linux | 6.1.11-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1017.19 | — |
| Ubuntu 24.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-72.79 | — |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1036.40 | — |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1038.45 | — |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1038.45.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1034.42 | — |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1033.38 | — |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1020.25 | — |
| Ubuntu 22.04 LTS | linux-ibm | 5.15.0-1030.33 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1030.35 | — |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1025.25 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1035.41 | — |
| Ubuntu 22.04 LTS | linux-raspi | 5.15.0-1029.31 | — |
| Ubuntu 22.04 LTS | linux-riscv +31 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1036.40~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1038.45~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1034.42~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-72.79~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1030.35~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1035.41~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1033.37~20.04.1 | — |
| 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 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1028.33 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1038.41 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.100.1 | SUSE-SU-2025:1241-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.100.1.150500.6.47.1 | SUSE-SU-2025:1241-1 |
| SLES 15 SP4 | kernel-64kb +6 | 5.14.21-150400.24.161.1 | SUSE-SU-2025:1195-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.161.1.150400.24.80.1 | SUSE-SU-2025:1195-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | kernel-default-base | 5.14.21-150500.55.100.1.150500.6.47.1 | SUSE-SU-2025:1241-1 |
| SLES for SAP 15 SP5 | kernel-docs +4 | 5.14.21-150500.55.100.1 | SUSE-SU-2025:1241-1 |
| SLES for SAP 15 SP4 | kernel-default-base | 5.14.21-150400.24.161.1.150400.24.80.1 | SUSE-SU-2025:1195-1 |
| SLES for SAP 15 SP4 | kernel-docs +4 | 5.14.21-150400.24.161.1 | SUSE-SU-2025:1195-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.100.1.150500.6.47.1 | SUSE-SU-2025:1241-1 |
| SLE Micro 5.5 | kernel-rt +1 | 5.14.21-150500.13.91.1 | SUSE-SU-2025:1176-1 |
| SLE Micro 5.5 | kernel-source +1 | 5.14.21-150500.55.100.1 | SUSE-SU-2025:1241-1 |
| SLE Micro 5.4 | kernel-default | 5.14.21-150400.24.161.1 | SUSE-SU-2025:1195-1 |
| SLE Micro 5.4 | kernel-default-base | 5.14.21-150400.24.161.1.150400.24.80.1 | SUSE-SU-2025:1195-1 |
| SLE Micro 5.4 | kernel-rt +1 | 5.14.21-150400.15.115.1 | SUSE-SU-2025:1183-1 |
| SLE Micro 5.3 | kernel-default | 5.14.21-150400.24.161.1 | SUSE-SU-2025:1195-1 |
| SLE Micro 5.3 | kernel-default-base | 5.14.21-150400.24.161.1.150400.24.80.1 | SUSE-SU-2025:1195-1 |
| SLE Micro 5.3 | kernel-rt +1 | 5.14.21-150400.15.115.1 | SUSE-SU-2025:1183-1 |
| SLE Micro 5.2 | kernel-default | 5.3.18-150300.59.235.1 | SUSE-SU-2026:0475-1 |
| SLE Micro 5.2 | kernel-default-base | 5.3.18-150300.59.235.1.150300.18.140.1 | SUSE-SU-2026:0475-1 |
| SLE Micro 5.2 | kernel-rt +1 | 5.3.18-150300.235.1 | SUSE-SU-2026:0495-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.100.1 | SUSE-SU-2025:1241-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_25 | 1-150500.11.3.1 | SUSE-SU-2025:1241-1 |
| SLE Live Patching 15 SP4 | kernel-default | 5.14.21-150400.24.161.1 | SUSE-SU-2025:1195-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_39 | 1-150400.9.3.1 | SUSE-SU-2025:1195-1 |
| SLE HPC 15 SP5 | kernel-64kb +5 | 5.14.21-150500.55.100.1 | SUSE-SU-2025:1241-1 |
| SLE HPC 15 SP5 | kernel-default-base | 5.14.21-150500.55.100.1.150500.6.47.1 | SUSE-SU-2025:1241-1 |
| SLE HPC 15 SP4 | kernel-64kb +5 | 5.14.21-150400.24.161.1 | SUSE-SU-2025:1195-1 |
| SLE HPC 15 SP4 | kernel-default-base | 5.14.21-150400.24.161.1.150400.24.80.1 | SUSE-SU-2025:1195-1 |
| SUSE Manager Server 4.3 | kernel-default-base | 5.14.21-150400.24.161.1.150400.24.80.1 | SUSE-SU-2025:1195-1 |
| SUSE Manager Server 4.3 | kernel-syms +3 | 5.14.21-150400.24.161.1 | SUSE-SU-2025:1195-1 |
| SUSE Manager Proxy 4.3 | kernel-default-base | 5.14.21-150400.24.161.1.150400.24.80.1 | SUSE-SU-2025:1195-1 |
| SUSE Manager Proxy 4.3 | kernel-syms +2 | 5.14.21-150400.24.161.1 | SUSE-SU-2025:1195-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.12-17.42 | 1.0-0.amzn2023 | ALAS2023-2023-132 |
| Amazon Linux 2023 | perf +12 | 6.1.12-17.42.amzn2023 | ALAS2023-2023-132 |
Advisories 8
- WID-SEC-2025-0649 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 3, 2026
- SUSE-SU-2026:0495-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0475-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:1176-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1241-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1183-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1195-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2023-132 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 5, 2025