CVE-2025-39997
linux: In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix race condition to UAF in sn...
CVE-2025-39997 is fixed in 24 products on 1 platform, first by DEBIAN-CVE-2025-39997, released October 15, 2025. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
n/a
No vendor severity
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0021
11th percentile
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free The previous commit 0718a78f6a9f ("ALSA: usb-audio: Kill timer properly at removal") patched a UAF issue caused by the error timer. However, because the error timer kill added in this patch occurs after the endpoint delete, a race condition to UAF still occurs, albeit rarely. Additionally, since kill-cleanup for urb is also missing, freed memory can be accessed in interrupt context related to urb, which can cause UAF. Therefore, to prevent this, error timer and urb must be killed before freeing the heap memory.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| dtb-aarch64 · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-64kb · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-64kb · sles 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-64kb · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-azure · opensuse-leap 15.6 | 6.4.0-150600.8.55.1 | SUSE-SU-2025:4128-1 | Nov 18, 2025 |
| kernel-azure · sles 15.6 | 6.4.0-150600.8.55.1 | SUSE-SU-2025:4128-1 | Nov 18, 2025 |
| kernel-azure · sles 15.7 | 6.4.0-150700.20.18.1 | SUSE-SU-2025:4132-1 | Nov 18, 2025 |
| kernel-debug · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-default · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-default · sles 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-default · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-default · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-default-base · opensuse-leap 15.6 | 6.4.0-150600.23.78.1.150600.12.34.2 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.6.1.160000.2.4 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-default-base · sles 15.6 | 6.4.0-150600.23.78.1.150600.12.34.2 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-default-base · sles 15.7 | 6.4.0-150700.53.22.1.150700.17.15.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.6.1.160000.2.4 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-docs · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-docs · sles 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-docs · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-docs · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-kvmsmall · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-livepatch-SLE15-SP6-RT_Update_17 · sles 15.6 | 1-150600.1.3.1 | SUSE-SU-2025:4301-1 | Nov 28, 2025 |
| kernel-livepatch-SLE15-SP6_Update_17 · sles 15.6 | 1-150600.13.5.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-livepatch-SLE15-SP7-RT_Update_6 · sles 15.7 | 1-150700.1.3.1 | SUSE-SU-2025:4141-1 | Nov 19, 2025 |
| kernel-livepatch-SLE15-SP7_Update_6 · sles 15.7 | 1-150700.15.3.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-obs-build · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-obs-build · sles 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-obs-build · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-obs-qa · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-rt · opensuse-leap 15.6 | 6.4.0-150600.10.58.1 | SUSE-SU-2025:4301-1 | Nov 28, 2025 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-rt_debug · opensuse-leap 15.6 | 6.4.0-150600.10.58.1 | SUSE-SU-2025:4301-1 | Nov 28, 2025 |
| kernel-source · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-source · sles 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-source · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-source · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-source-azure · opensuse-leap 15.6 | 6.4.0-150600.8.55.1 | SUSE-SU-2025:4128-1 | Nov 18, 2025 |
| kernel-source-azure · sles 15.6 | 6.4.0-150600.8.55.1 | SUSE-SU-2025:4128-1 | Nov 18, 2025 |
| kernel-source-azure · sles 15.7 | 6.4.0-150700.20.18.1 | SUSE-SU-2025:4132-1 | Nov 18, 2025 |
| kernel-source-rt · opensuse-leap 15.6 | 6.4.0-150600.10.58.1 | SUSE-SU-2025:4301-1 | Nov 28, 2025 |
| kernel-syms · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-syms · sles 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-syms · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-syms · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-syms-azure · opensuse-leap 15.6 | 6.4.0-150600.8.55.1 | SUSE-SU-2025:4128-1 | Nov 18, 2025 |
| kernel-syms-azure · sles 15.6 | 6.4.0-150600.8.55.1 | SUSE-SU-2025:4128-1 | Nov 18, 2025 |
| kernel-syms-azure · sles 15.7 | 6.4.0-150700.20.18.1 | SUSE-SU-2025:4132-1 | Nov 18, 2025 |
| kernel-syms-rt · opensuse-leap 15.6 | 6.4.0-150600.10.58.1 | SUSE-SU-2025:4301-1 | Nov 28, 2025 |
| kernel-zfcpdump · opensuse-leap 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-zfcpdump · sles 15.6 | 6.4.0-150600.23.78.1 | SUSE-SU-2025:4140-1 | Nov 19, 2025 |
| kernel-zfcpdump · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| linux · Debian 12.15 (bookworm) | 6.1.176-1 | DEBIAN-CVE-2025-39997 | Oct 15, 2025 |
| linux · Debian 14 | 6.16.11-1 | DEBIAN-CVE-2025-39997 | Oct 15, 2025 |
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