CVE-2026-64001: ALSA: pcm: oss: Fix setup list UAF on proc write error
High 7.8 EPSS 0.1% Linux kernel
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix setup list UAF on proc write error snd_pcm_oss_proc_write() links a newly allocated setup entry into the OSS setup list before duplicating the task name. If the task-name allocation fails, the error path frees the already linked entry and leaves setup_list pointing at freed memory. A later OSS device open can then walk the stale list entry in snd_pcm_oss_look_for_setup() and dereference freed memory. Allocate the task name and initialize the setup entry before publishing the entry on setup_list. Also fetch the initial proc read iterator only after taking setup_mutex, so all setup_list traversal follows the same list lifetime rules.
- CVE-2026-64001CVE identifier
- 7.8CVSS 3.1 base score (high)
- 0.1%EPSS: chance of exploitation in the next 30 days (higher than 3% of CVEs)
- 2026-07-19published
What do these terms mean? CVE · CVSS score · exploited (KEV) · EPSS · backported fix · all terms
What to do now
- Check whether you run Linux kernel and which version (commands below).
- Install the fixed version for your system: see “Patch it” below.
- Reboot into the new kernel (uname -r to confirm); live patching (kpatch, Ubuntu Livepatch, SUSE kGraft/klp) can defer the reboot for some CVEs
Affected and fixed versions
Affected:
- Linux Linux 060d77b9c04acd7aef60790398a53f731db8c8fe to before d9df965284abde27ba6bfbdfc8407697cf6802f1
- Linux Linux 060d77b9c04acd7aef60790398a53f731db8c8fe to before 8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce
- Linux Linux 060d77b9c04acd7aef60790398a53f731db8c8fe to before e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c
- Linux Linux 060d77b9c04acd7aef60790398a53f731db8c8fe to before be387230dc22d870afd0e5d35912b07c2bc323bd
- Linux Linux 060d77b9c04acd7aef60790398a53f731db8c8fe to before 4cc54bdd54b337e77115be5b55577d1c58608eae
- Linux Linux 2.6.17
Patch it
Use the commands for your system. Distribution packages often keep an older version number with the fix backported, so compare with the fixed package versions in the table below, not only with the upstream version.
Debian
sudo apt update
sudo apt install --only-upgrade linux-image-amd64Ubuntu
sudo apt update
sudo apt install --only-upgrade linux-image-generic (or the installed flavour: linux-image-aws, -azure, -gcp, -virtual)RHEL, AlmaLinux, Rocky, Oracle
sudo dnf upgrade --refresh kernelFedora
sudo dnf upgrade --refresh kernelSUSE / openSUSE
sudo zypper refresh
sudo zypper update kernel-defaultAmazon Linux
sudo dnf upgrade --releasever=latest kernel kernel6.12Arch Linux
sudo pacman -SyuAlpine
apk update && apk upgrade linux-lts linux-virtFreeBSD
not LinuxGeneral update steps for every system are on the Linux and Unix & BSD pages; after updating, see which services to restart.
Fix status in Linux distributions
| Release | Package | Status | Fixed version / advisory |
|---|---|---|---|
| Debian 12 | linux | not fixed yet | |
| Debian 13 | linux | fixed | 6.12.94-1 |
| Debian testing | linux | fixed | 7.0.12-1 |
| Red Hat Enterprise Linux 9 | kernel | affected | |
| Red Hat Enterprise Linux 9 | kernel-rt | affected | |
| Red Hat Enterprise Linux 6 | kernel | out of support scope | |
| Red Hat Enterprise Linux 10 | kernel | affected | |
From the Debian security tracker, Ubuntu CVE tracker and Red Hat Security Data API, refreshed every few hours.
Sources
- https://git.kernel.org/stable/c/d9df965284abde27ba6bfbdfc8407697cf6802f1
- https://git.kernel.org/stable/c/8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce
- https://git.kernel.org/stable/c/e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c
- https://git.kernel.org/stable/c/be387230dc22d870afd0e5d35912b07c2bc323bd
- https://git.kernel.org/stable/c/4cc54bdd54b337e77115be5b55577d1c58608eae
- CVE-2026-64001 on CVE.org
- CVE-2026-64001 on NVD
Page generated automatically from official sources on 2026-11-03 18:05 UTC. Always confirm with your vendor's advisory.