Description
Race condition in the snd_pcm_period_elapsed function in sound/core/pcm_lib.c in the ALSA subsystem in the Linux kernel before 4.7 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted SNDRV_PCM_TRIGGER_START command.
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 | 4.7.2-1 | — |
| Debian 13 | linux | 4.7.2-1 | — |
| Debian 12 | linux | 4.7.2-1 | — |
| Debian 7 | linux | 3.2.84-1 | DLA-772-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-riscv +6 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +3 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-59.80 | USN-3169-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1003.12 | — |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1040.47 | USN-3169-3 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1044.48 | USN-3169-4 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-107.154 | USN-3168-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-79.87~14.04.1 | — |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-59.80~14.04.1 | USN-3169-2 |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | perf +18 | 3.10.0-514.el7 | RHSA-2016:2574 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | kernel-docs | 4.4.21-90.3 | SUSE-SU-2016:3146-1 |
| SLES 12 SP2 | kernel-syms +3 | 4.4.21-90.1 | SUSE-SU-2016:3146-1 |
| SLES 12 SP1 | kernel-docs | 3.12.67-60.64.24.3 | SUSE-SU-2016:3188-1 |
| SLES 12 SP1 | kernel-xen +4 | 3.12.67-60.64.24.1 | SUSE-SU-2016:3188-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.60-52.63.1 | SUSE-SU-2016:3217-1, SUSE-SU-2016:3188-1 |
| SLES 12 | kgraft-patch-SLE12_Update_10 | 8-2.1 | SUSE-SU-2017:0247-1 |
| SLES 12 | kgraft-patch-SLE12_Update_11 | 7-2.1 | SUSE-SU-2017:0268-1 |
| SLES 12 | kgraft-patch-SLE12_Update_12 +3 | 5-2.1 | SUSE-SU-2017:0249-1, SUSE-SU-2017:0248-1, SUSE-SU-2017:0246-1 |
| SLES 12 | kgraft-patch-SLE12_Update_16 | 3-2.1 | SUSE-SU-2017:0245-1 |
| SLES 12 | kgraft-patch-SLE12_Update_17 | 2-2.1 | SUSE-SU-2017:0267-1 |
| SLES 12 | kgraft-patch-SLE12_Update_18 | 1-2.1 | SUSE-SU-2016:3217-1 |
| SLES 11 SP4 | kernel-docs | 3.0.101-91.2 | SUSE-SU-2016:3203-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-91.1 | SUSE-SU-2016:3203-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.93.1 | SUSE-SU-2016:3248-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP2 | kernel-ec2 +6 | 3.0.101-0.7.47.1 | SUSE-SU-2016:3252-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.21-90.1 | SUSE-SU-2016:3146-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.67-60.64.24.1 | SUSE-SU-2016:3188-1 |
| SLES for SAP 12 | kernel-xen +3 | 3.12.60-52.63.1 | SUSE-SU-2016:3217-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_10 | 8-2.1 | SUSE-SU-2017:0247-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_11 | 7-2.1 | SUSE-SU-2017:0268-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_12 +3 | 5-2.1 | SUSE-SU-2017:0249-1, SUSE-SU-2017:0248-1, SUSE-SU-2017:0246-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_16 | 3-2.1 | SUSE-SU-2017:0245-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_17 | 2-2.1 | SUSE-SU-2017:0267-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_18 | 1-2.1 | SUSE-SU-2016:3217-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-91.1 | SUSE-SU-2016:3203-1 |
| SLE Real Time 12 SP1 | kernel-rt +5 | 3.12.69-60.30.1 | SUSE-SU-2017:0407-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-68.1 | SUSE-SU-2017:1102-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_11 | 1-2.1 | SUSE-SU-2016:3188-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_2 | 8-2.1 | SUSE-SU-2017:0231-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_3 | 7-2.1 | SUSE-SU-2017:0233-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_4 +2 | 6-2.1 | SUSE-SU-2017:0235-1, SUSE-SU-2017:0234-1, SUSE-SU-2017:0230-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_7 | 5-2.1 | SUSE-SU-2017:0226-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_8 | 4-2.1 | SUSE-SU-2017:0278-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_9 +1 | 3-2.1 | SUSE-SU-2017:0229-1, SUSE-SU-2017:0228-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_0 | 3-8.2 | SUSE-SU-2017:0227-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_2 +1 | 2-2.1 | SUSE-SU-2017:0294-1, SUSE-SU-2017:0293-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_3 | 1-2.3 | SUSE-SU-2016:3146-1 |
| SUSE OpenStack Cloud 5 | kernel-ec2 +6 | 3.0.101-0.47.93.1 | SUSE-SU-2016:3248-1 |
| SUSE Manager Proxy 2.1 | kernel-ec2 +6 | 3.0.101-0.47.93.1 | SUSE-SU-2016:3248-1 |
| SUSE Manager 2.1 | kernel-ec2 +6 | 3.0.101-0.47.93.1 | SUSE-SU-2016:3248-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.93.1 | SUSE-SU-2016:3248-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.16.2.el6uek | 0.4.5-3.el6 | ELSA-2017-3509 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.16.2.el7uek | 0.4.5-3.el7 | ELSA-2017-3509 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.25.el6uek | 0.5.3-2.el6 | ELSA-2017-3508 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.25.el7uek | 0.5.3-2.el7 | ELSA-2017-3508 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.16.2.el7uek | ELSA-2017-3509, ELSA-2017-3508 |
Advisories 37
- RHSA-2016:2574 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3169-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3168-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-772-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3169-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3169-3 linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3169-4 linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:0234-1 Security update for Linux Kernel Live Patch 4 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0233-1 Security update for Linux Kernel Live Patch 3 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1102-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0228-1 Security update for Linux Kernel Live Patch 1 for SLE 12 SP2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3146-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0267-1 Security update for Linux Kernel Live Patch 17 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0229-1 Security update for Linux Kernel Live Patch 9 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0268-1 Security update for Linux Kernel Live Patch 11 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0244-1 Security update for Linux Kernel Live Patch 12 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3203-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0227-1 Security update for Linux Kernel Live Patch 0 for SLE 12 SP2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3248-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0248-1 Security update for Linux Kernel Live Patch 14 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0231-1 Security update for Linux Kernel Live Patch 2 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3188-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0294-1 Security update for Linux Kernel Live Patch 10 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0407-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3217-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0235-1 Security update for Linux Kernel Live Patch 5 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0226-1 Security update for Linux Kernel Live Patch 7 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0247-1 Security update for Linux Kernel Live Patch 10 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0245-1 Security update for Linux Kernel Live Patch 16 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0278-1 Security update for Linux Kernel Live Patch 8 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0293-1 Security update for Linux Kernel Live Patch 2 for SLE 12 SP2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3252-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:0246-1 Security update for Linux Kernel Live Patch 15 for SLE 12 SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:0249-1 Security update for Linux Kernel Live Patch 13 for SLE 12 SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:0230-1 Security update for Linux Kernel Live Patch 6 for SLE 12 SP1 SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2017-3509 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 12, 2017
- ELSA-2017-3508 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 12, 2017
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1401494
- openSUSE-SU-2016:3118 vendor-advisory
- SUSE-SU-2016:3248 vendor-advisory
- https://patchwork.kernel.org/patch/8752621/
- https://source.android.com/security/bulletin/2017-05-01
- SUSE-SU-2016:3188 vendor-advisory
- RHSA-2016:2574 vendor-advisory
- SUSE-SU-2016:3146 vendor-advisory
- SUSE-SU-2016:3203 vendor-advisory
- SUSE-SU-2016:3217 vendor-advisory
- [oss-security] 20161203 CVE request: -- Linux kernel: ALSA: use-after-free in,kill_fasync mailing-list
- https://github.com/torvalds/linux/commit/3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4
- 94654 vdb-entry
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4
- SUSE-SU-2016:3252 vendor-advisory