Description
In the Linux kernel, the following vulnerability has been resolved:
ALSA: Fix deadlocks with kctl removals at disconnection
In snd_card_disconnect(), we set card->shutdown flag at the beginning,
call callbacks and do sync for card->power_ref_sleep waiters at the
end. The callback may delete a kctl element, and this can lead to a
deadlock when the device was in the suspended state. Namely:
* A process waits for the power up at snd_power_ref_and_wait() in
snd_ctl_info() or read/write() inside card->controls_rwsem.
* The system gets disconnected meanwhile, and the driver tries to
delete a kctl via snd_ctl_remove*(); it tries to take
card->controls_rwsem again, but this is already locked by the
above. Since the sleeper isn't woken up, this deadlocks.
An easy fix is to wake up sleepers before processing the driver
disconnect callbacks but right after setting the card->shutdown flag.
Then all sleepers will abort immediately, and the code flows again.
So, basically this patch moves the wait_event() call at the right
timing. While we're at it, just to be sure, call wait_event_all()
instead of wait_event(), although we don't use exclusive events on
this queue for now.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.14 | 5.15.161 |
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 | 6.8.12-1 | — |
| Debian 13 | linux | 6.8.12-1 | — |
| Debian 12 | linux | 6.1.94-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1050.52 | — |
| 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 | 5.15.0-118.128 | USN-6950-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1067.73 | USN-6950-1 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1013.14~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1070.79 | USN-6956-1 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1012.14~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1070.79.1 | USN-6956-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1066.74 | USN-6950-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 | 6.8.0-1012.13~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1064.70 | USN-6950-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1050.57 | USN-6950-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 | 6.8.0-40.40~22.04.3 | — |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1060.63 | USN-6950-2 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 +1 | 6.8.0-1010.10~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1062.68 | USN-6950-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1064.69 | USN-6950-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1062.63 | USN-6950-1 |
| 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 | 5.15.0-1027.27 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1015.15 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1065.71 | USN-6950-3 |
| Ubuntu 22.04 LTS | linux-riscv +31 | 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 | 5.15.0-1035.39 | USN-7019-1 |
| Ubuntu 20.04 LTS | linux | 5.4.0-192.212 | USN-6951-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1130.140 | USN-6951-1 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1067.73~20.04.1 | USN-6950-2 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1135.142 | USN-6951-2 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1070.79~20.04.1 | USN-6956-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1070.79~20.04.1.1 | USN-6956-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1090.97 | USN-6951-4 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1134.143 | USN-6951-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1066.74~20.04.1 | USN-6950-1 |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1097.101 | USN-6951-1 |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1050.57~20.04.1 | USN-6950-2 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-118.128~20.04.1 | USN-6950-4, USN-6950-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1077.82 | USN-6951-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1060.63~20.04.1 | USN-6950-2 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1062.68~20.04.1 | USN-6950-1 |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1042.43 | USN-6951-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1118.125 | USN-6951-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1027.27~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1129.138 | USN-6953-1 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1065.71~20.04.1 | USN-6957-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1114.126 | USN-6951-1 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1063.67~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-xilinx-zynqmp | 5.4.0-1049.53 | USN-6951-1 |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 7 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 | 5.15.0-1060.62 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1068.76 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1006.6~22.04.1 | — |
| 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 | 5.15.0-1067.73+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1070.79+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-118.128+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1066.74+fips1 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 | 5.4.0-1130.140~18.04.1 | USN-6951-1 |
| Ubuntu Pro 18.04 LTS | linux-azure-5.4 | 5.4.0-1135.142~18.04.1 | USN-6951-3 |
| Ubuntu Pro 18.04 LTS | linux-gcp-5.4 | 5.4.0-1134.143~18.04.1 | USN-6951-1 |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-192.212~18.04.1 | USN-6951-1 |
| Ubuntu Pro 18.04 LTS | linux-ibm-5.4 | 5.4.0-1077.82~18.04.1 | USN-6951-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle-5.4 | 5.4.0-1129.138~18.04.1 | USN-6953-1 |
| Ubuntu Pro 18.04 LTS | linux-raspi-5.4 | 5.4.0-1114.126~18.04.1 | USN-6979-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bpftool | 7.4.0-503.11.1.el9_5 | RHSA-2024:9315 |
| RHEL 9 | rv +67 | 5.14.0-503.11.1.el9_5 | RHSA-2024:9315 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | kernel-64kb | 6.4.0-150600.23.14.1 | SUSE-SU-2024:2571-1 |
| SLES 15 SP6 | kernel-azure +1 | 6.4.0-150600.8.8.2 | SUSE-SU-2024:2896-1 |
| SLES 15 SP6 | kernel-default-base | 6.4.0-150600.23.14.2.150600.12.4.3 | SUSE-SU-2024:2571-1 |
| SLES 15 SP6 | kernel-docs +5 | 6.4.0-150600.23.14.2 | SUSE-SU-2024:2571-1 |
| SLES 15 SP6 | kernel-syms-azure | 6.4.0-150600.8.8.1 | SUSE-SU-2024:2896-1 |
| SLES 15 SP5 | kernel-64kb +5 | 5.14.21-150500.55.73.1 | SUSE-SU-2024:2939-1 |
| SLES 15 SP5 | kernel-azure +2 | 5.14.21-150500.33.60.1 | SUSE-SU-2024:2372-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.73.1.150500.6.33.8 | SUSE-SU-2024:2939-1 |
| SLES 15 SP5 | kernel-docs | 5.14.21-150500.55.73.2 | SUSE-SU-2024:2939-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.0 | kernel-default-base | 6.4.0-17.1.1.51 | SUSE-SU-2025:20008-1 |
| SLE Micro 6.0 | kernel-rt +1 | 6.4.0-9.1 | SUSE-SU-2025:20028-1 |
| SLE Micro 6.0 | kernel-source +2 | 6.4.0-18.1 | SUSE-SU-2025:20008-1 |
| SLE Micro 5.5 | kernel-default | 5.14.21-150500.55.73.1 | SUSE-SU-2024:2939-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.73.1.150500.6.33.8 | SUSE-SU-2024:2939-1 |
| SLE Micro 5.5 | kernel-rt +1 | 5.14.21-150500.13.61.1 | SUSE-SU-2024:2394-1 |
| SLE Live Patching 15 SP6 | kernel-default | 6.4.0-150600.23.14.2 | SUSE-SU-2024:2571-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_1 | 1-150600.1.5.1 | SUSE-SU-2024:2973-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_2 | 1-150600.13.3.2 | SUSE-SU-2024:2571-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.73.1 | SUSE-SU-2024:2939-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_17 +1 | 1-150500.11.3.1 | SUSE-SU-2024:2939-1, SUSE-SU-2024:2394-1 |
| SUSE Real Time Module 15 SP6 | kernel-rt +3 | 6.4.0-150600.10.5.1 | SUSE-SU-2024:2973-1 |
| SUSE Real Time Module 15 SP5 | kernel-rt +3 | 5.14.21-150500.13.61.1 | SUSE-SU-2024:2394-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | dtb-aarch64 +1 | 6.4.0-150600.23.14.1 | SUSE-SU-2024:2571-1 |
| openSUSE Leap 15.6 | kernel-azure +1 | 6.4.0-150600.8.8.2 | SUSE-SU-2024:2896-1 |
| openSUSE Leap 15.6 | kernel-default-base | 6.4.0-150600.23.14.2.150600.12.4.3 | SUSE-SU-2024:2571-1 |
| openSUSE Leap 15.6 | kernel-docs +8 | 6.4.0-150600.23.14.2 | SUSE-SU-2024:2571-1 |
| openSUSE Leap 15.6 | kernel-rt +3 | 6.4.0-150600.10.5.1 | SUSE-SU-2024:2973-1 |
| openSUSE Leap 15.6 | kernel-syms-azure | 6.4.0-150600.8.8.1 | SUSE-SU-2024:2896-1 |
| openSUSE Leap 15.5 | dtb-aarch64 +9 | 5.14.21-150500.55.73.1 | SUSE-SU-2024:2939-1 |
| openSUSE Leap 15.5 | kernel-azure +2 | 5.14.21-150500.33.60.1 | SUSE-SU-2024:2372-1 |
| openSUSE Leap 15.5 | kernel-default-base | 5.14.21-150500.55.73.1.150500.6.33.8 | SUSE-SU-2024:2939-1 |
| openSUSE Leap 15.5 | kernel-docs | 5.14.21-150500.55.73.2 | SUSE-SU-2024:2939-1 |
| openSUSE Leap 15.5 | kernel-rt +3 | 5.14.21-150500.13.61.1 | SUSE-SU-2024:2394-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.5 | kernel-default | 5.14.21-150500.55.73.1 | SUSE-SU-2024:2939-1 |
| openSUSE Leap Micro 5.5 | kernel-default-base | 5.14.21-150500.55.73.1.150500.6.33.8 | SUSE-SU-2024:2939-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | bpftool | 7.4.0-503.11.1.el9_5 | ELSA-2024-9315 |
| Oracle Linux 9 | rv +28 | 5.14.0-503.11.1.el9_5 | ELSA-2024-9315 |
Advisories 29
- USN-7019-1 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 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
- USN-6951-1 linux, linux-aws, linux-aws-5.4, linux-gcp, linux-gcp-5.4, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-iot, linux-kvm, linux-raspi, linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6950-1 linux, linux-aws, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-intel-iotg, linux-intel-iotg-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6950-2 linux-aws-5.15, linux-gkeop-5.15, linux-ibm, linux-ibm-5.15, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6956-1 linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6979-1 linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6951-3 linux-azure-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6953-1 linux-oracle, linux-oracle-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6951-4 linux-bluefield vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6951-2 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6957-1 linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6950-4 linux-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6950-3 linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- RHSA-2024:9315 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- WID-SEC-2024-1418 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Sep 8, 2026
- SUSE-SU-2025:20008-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20028-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2024:2973-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2394-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2939-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2896-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2372-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2571-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2024-9315 Moderate: kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 14, 2024
References
- https://git.kernel.org/stable/c/ff80185e7b7b547a0911fcfc8aefc61c3e8304d7
- https://git.kernel.org/stable/c/c2fb439f4f1425a961d20bec818fed2c2d9ef70a
- https://git.kernel.org/stable/c/2f103287ef7960854808930499d1181bd0145d68
- https://git.kernel.org/stable/c/88ce3fe255d58a93624b467af036dc3519f309c7
- https://git.kernel.org/stable/c/6b55e879e7bd023a03888fc6c8339edf82f576f4
- https://git.kernel.org/stable/c/87988a534d8e12f2e6fc01fe63e6c1925dc5307c