In the Linux kernel, the following vulnerability has been resolved:
ALSA: pcm: oss: Fix race at SNDCTL_DSP_SYNC
There is a small race window at snd_pcm_oss_sync() that is called from OSS PCM SNDCTL_DSP_SYNC ioctl; namely the function calls snd_pcm_oss_make_ready() at first, then takes the params_lock mutex for the rest. When the stream is set up again by another thread between them, it leads to inconsistency, and may result in unexpected results such as NULL dereference of OSS buffer as a fuzzer spotted recently.
The fix is simply to cover snd_pcm_oss_make_ready() call into the same params_lock mutex with snd_pcm_oss_make_ready_locked() variant.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Mar 4, 2025 | Mar 2, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Mar 2, 2025 |
| Ubuntu | — | Upgrade linux-azure-5.4Upgrade linux-gcp-fipsUpgrade linux-nvidiaUpgrade linux-azure-5.15Upgrade linux-hwe-5.4Upgrade linux-azure-4.15Upgrade linux-kvmUpgrade linux-gkeopUpgrade linux-gcp-4.15Upgrade linux-ibmUpgrade linux-gcpUpgrade linux-gcp-5.4Upgrade linux-iotUpgrade linux-riscv-5.15Upgrade linux-oracleUpgrade linux-hweUpgrade linux-azureUpgrade linux-oracle-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-intel-iotgUpgrade linux-aws-fipsUpgrade linux-hwe-5.15Upgrade linux-aws-hweUpgrade linux-lowlatencyUpgrade linux-fipsUpgrade linux-azure-fipsUpgrade linux-gcp-5.15Upgrade linux-realtimeUpgrade linux-aws-5.4Upgrade linux-lts-xenialUpgrade linuxUpgrade linux-aws-5.15Upgrade linux-oracle-5.4Upgrade linux-awsUpgrade linux-raspi-5.4Upgrade linux-azure-fdeUpgrade linux-raspiUpgrade linux-bluefieldUpgrade linux-gkeUpgrade linux-ibm-5.4Upgrade linux-lowlatency-hwe-5.15 | Mar 11, 2025 | Mar 2, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Mar 2, 2025 |
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