In the Linux kernel, the following vulnerability has been resolved:
ALSA: ctxfi: Limit PTP to a single page
Commit 391e69143d0a increased CT_PTP_NUM from 1 to 4 to support 256 playback streams, but the additional pages are not used by the card correctly. The CT20K2 hardware already has multiple VMEM_PTPAL registers, but using them separately would require refactoring the entire virtual memory allocation logic.
ct_vm_map() always uses PTEs in vm->ptp[0].area regardless of CT_PTP_NUM. On AMD64 systems, a single PTP covers 512 PTEs (2M). When aggregate memory allocations exceed this limit, ct_vm_map() tries to access beyond the allocated space and causes a page fault:
BUG: unable to handle page fault for address: ffffd4ae8a10a000 Oops: Oops: 0002 [#1] SMP PTI RIP: 0010:ct_vm_map+0x17c/0x280 [snd_ctxfi] Call Trace: atc_pcm_playback_prepare+0x225/0x3b0 ct_pcm_playback_prepare+0x38/0x60 snd_pcm_do_prepare+0x2f/0x50 snd_pcm_action_single+0x36/0x90 snd_pcm_action_nonatomic+0xbf/0xd0 snd_pcm_ioctl+0x28/0x40 __x64_sys_ioctl+0x97/0xe0 do_syscall_64+0x81/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e
Revert CT_PTP_NUM to 1. The 256 SRC_RESOURCE_NUM and playback_count remain unchanged.
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-6.1Upgrade linux | Jul 5, 2026 | Jul 5, 2026 |
| Ubuntu | — | Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-fips-6.8Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-azure-lts-24.04Upgrade linux-image-5.15.0-1112-aws-64kUpgrade linux-image-azureUpgrade linux-image-nvidia-tegra-igxUpgrade linux-image-6.8.0-1046-gkeopUpgrade linux-image-5.15.0-1053-nvidia-tegra-igxUpgrade linux-image-5.15.0-1064-nvidia-tegraUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1059-gke-64kUpgrade linux-image-raspiUpgrade linux-image-raspi-6.8Upgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-7.0.0-1013-nvidia-64kUpgrade linux-image-oem-24.04cUpgrade linux-image-oracle-5.15Upgrade linux-image-oracle-64kUpgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-5.15.0-1112-gcpUpgrade linux-image-7.0.0-1007-oracle-64kUpgrade linux-image-laptop-23.10Upgrade linux-image-fips-5.15Upgrade linux-image-5.15.0-1112-awsUpgrade linux-image-azure-6.8Upgrade linux-image-azure-7.0Upgrade linux-image-xilinx-6.8Upgrade linux-image-gcp-64k-7.0Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-intelUpgrade linux-image-nvidia-5.15Upgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-oem-22.04bUpgrade linux-image-5.15.0-1117-azure-fipsUpgrade linux-image-6.8.0-1059-gkeUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-gcp-64kUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-6.8.0-2050-raspi-realtimeUpgrade linux-image-oracle-6.8Upgrade linux-image-realtime-6.8.1Upgrade linux-image-oem-24.04Upgrade linux-image-5.15.0-1104-intel-iot-realtimeUpgrade linux-image-kvmUpgrade linux-image-virtual-5.15Upgrade linux-image-realtime-hwe-26.04Upgrade linux-image-5.15.0-186-fipsUpgrade linux-image-5.15.0-186-generic-64kUpgrade linux-image-5.15.0-1111-realtimeUpgrade linux-image-6.8.0-1059-nvidia-lowlatency-64kUpgrade linux-image-generic-7.0Upgrade linux-image-generic-hwe-26.04Upgrade linux-image-oracle-64k-7.0Upgrade linux-image-aws-64kUpgrade linux-image-gke-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-realtimeUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-aws-lts-22.04Upgrade linux-image-aws-64k-6.8Upgrade linux-image-raspi-realtimeUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1061-ibmUpgrade linux-image-oem-24.04dUpgrade linux-image-6.8.0-1030-nvidia-tegraUpgrade linux-image-6.8.0-1059-nvidiaUpgrade linux-image-realtime-64kUpgrade linux-image-xilinxUpgrade linux-image-intel-iotgUpgrade linux-image-5.15.0-1112-aws-fipsUpgrade linux-image-7.0.0-27-genericUpgrade linux-image-gkeop-5.15Upgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-ibm-6.8Upgrade linux-image-7.0.0-27-realtimeUpgrade linux-image-aws-6.8Upgrade linux-image-6.8.0-136-genericUpgrade linux-image-aws-fips-6.8Upgrade linux-image-5.15.0-186-genericUpgrade linux-image-5.15.0-1106-raspiUpgrade linux-image-5.15.0-184-lowlatencyUpgrade linux-image-generic-64k-6.8Upgrade linux-image-gke-64k-6.8Upgrade linux-image-5.15.0-1109-oracleUpgrade linux-image-gcp-5.15Upgrade linux-image-aws-lts-24.04Upgrade linux-image-oem-22.04cUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-oem-20.04cUpgrade linux-image-5.15.0-1053-nvidia-tegra-igx-rtUpgrade linux-image-oem-24.04aUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-6.8.0-1063-azureUpgrade linux-image-gcpUpgrade linux-image-generic-6.8Upgrade linux-image-generic-64k-7.0Upgrade linux-image-5.15.0-1095-gkeopUpgrade linux-image-7.0.0-27-realtime-64kUpgrade linux-image-awsUpgrade linux-image-7.0.0-1007-gcpUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-azure-fipsUpgrade linux-image-oem-20.04dUpgrade linux-image-raspi-7.0Upgrade linux-image-realtime-5.15Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-virtualUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-azure-5.15Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-azure-fips-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-raspi-5.15Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-6.8.0-1061-aws-fipsUpgrade linux-image-6.8.0-1063-azure-fipsUpgrade linux-image-azure-cvmUpgrade linux-image-6.8.0-1058-oracleUpgrade linux-image-5.15.0-1064-nvidia-tegra-rtUpgrade linux-image-nvidia-64kUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-7.0.0-28-generic-64kUpgrade linux-image-aws-5.15Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-oracle-7.0Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-lowlatency-6.8Upgrade linux-image-kvm-5.15Upgrade linux-image-gkeopUpgrade linux-image-gkeUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-generic-lpaeUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-generic-64k-5.15Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-6.8.0-1059-nvidia-lowlatencyUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-7.0.0-1008-aws-64kUpgrade linux-image-aws-64k-5.15Upgrade linux-image-5.15.0-1107-nvidiaUpgrade linux-image-5.15.0-1117-azure-fdeUpgrade linux-image-oem-20.04bUpgrade linux-image-nvidia-tegraUpgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-nvidia-6.8Upgrade linux-image-nvidiaUpgrade linux-image-gke-5.15Upgrade linux-image-6.8.0-1030-nvidia-tegra-rtUpgrade linux-image-7.0.0-1007-oracleUpgrade linux-image-6.8.0-136-lowlatency-64kUpgrade linux-image-6.8.0-136-fipsUpgrade linux-image-7.0.0-28-genericUpgrade linux-image-7.0.0-1014-raspi-realtimeUpgrade linux-image-7.0.0-1013-nvidiaUpgrade linux-image-5.15.0-184-lowlatency-64kUpgrade linux-image-5.15.0-1107-nvidia-lowlatencyUpgrade linux-image-5.15.0-1107-intel-iotgUpgrade linux-image-virtual-7.0Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-lowlatencyUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-aws-fipsUpgrade linux-image-gcp-6.8Upgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-azure-fde-6.8Upgrade linux-image-7.0.0-27-generic-64kUpgrade linux-image-6.8.0-1064-gcpUpgrade linux-image-6.8.0-1059-nvidia-64kUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1061-raspiUpgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-intel-iotg-5.15Upgrade linux-image-gke-64kUpgrade linux-image-genericUpgrade linux-image-gcp-fipsUpgrade linux-image-azure-fde-5.15Upgrade linux-image-5.15.0-1106-ibmUpgrade linux-image-5.15.0-1104-kvmUpgrade linux-image-5.15.0-1075-xilinx-zynqmpUpgrade linux-image-oracleUpgrade linux-image-oem-22.04Upgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-5.15.0-1112-gcp-fipsUpgrade linux-image-lowlatency-5.15Upgrade linux-image-5.15.0-186-generic-lpaeUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-azure-fde-7.0Upgrade linux-image-6.8.0-1061-aws-64kUpgrade linux-image-6.8.1-1056-realtimeUpgrade linux-image-realtime-64k-7.0Upgrade linux-image-oem-20.04Upgrade linux-image-raspi-nolpaeUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-virtual-6.8Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-nvidia-7.0Upgrade linux-image-6.8.0-1058-oracle-64kUpgrade linux-image-6.8.0-1033-xilinxUpgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-6.8.0-1061-awsUpgrade linux-image-5.15.0-1117-azureUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-ibm-5.15Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-gcp-7.0Upgrade linux-image-azure-fips-5.15Upgrade linux-image-6.8.0-136-lowlatencyUpgrade linux-image-aws-7.0Upgrade linux-image-aws-64k-7.0Upgrade linux-image-6.8.0-1064-gcp-fipsUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-fipsUpgrade linux-image-generic-64kUpgrade linux-image-aws-fips-5.15Upgrade linux-image-7.0.0-1007-gcp-64kUpgrade linux-image-realtime-7.0Upgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-oem-22.04aUpgrade linux-image-ibm-7.0Upgrade linux-image-oem-24.04bUpgrade linux-image-gkeop-6.8Upgrade linux-image-generic-5.15Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-lowlatency-64kUpgrade linux-image-ibmUpgrade linux-image-azure-fdeUpgrade linux-image-7.0.0-1008-awsUpgrade linux-image-7.0.0-1009-ibmUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-6.8.0-1064-gcp-64kUpgrade linux-image-gcp-fips-5.15Upgrade linux-image-7.0.0-1014-raspiUpgrade linux-image-7.0.0-1010-azureUpgrade linux-image-5.15.0-1108-gkeUpgrade linux-image-raspi-realtime-7.0 | Jul 1, 2026 | Apr 24, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jun 10, 2026 | Apr 24, 2026 |
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