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Vulnerability · Published May 3, 2024 · Assigned by Linux

CVE-2022-48702ALSA: emu10k1: Fix out of bounds access in snd_emu10k1_pcm_channel_alloc()

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 85.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: ALSA: emu10k1: Fix out of bounds access in snd_emu10k1_pcm_channel_alloc() The voice allocator sometimes begins allocating from near the end of the array and then wraps around, however snd_emu10k1_pcm_channel_alloc() accesses the newly allocated voices as if it never wrapped around. This results in out of bounds access if the first voice has a high enough index so that first_voice + requested_voice_count > NUM_G (64). The more voices are requested, the more likely it is for this to occur. This was initially discovered using PipeWire, however it can be reproduced by calling aplay multiple times with 16 channels: aplay -r 48000 -D plughw:CARD=Live,DEV=3 -c 16 /dev/zero UBSAN: array-index-out-of-bounds in sound/pci/emu10k1/emupcm.c:127:40 index 65 is out of range for type 'snd_emu10k1_voice [64]' CPU: 1 PID: 31977 Comm: aplay Tainted: G W IOE 6.0.0-rc2-emu10k1+ #7 Hardware name: ASUSTEK COMPUTER INC P5W DH Deluxe/P5W DH Deluxe, BIOS 3002 07/22/2010 Call Trace: <TASK> dump_stack_lvl+0x49/0x63 dump_stack+0x10/0x16 ubsan_epilogue+0x9/0x3f __ubsan_handle_out_of_bounds.cold+0x44/0x49 snd_emu10k1_playback_hw_params+0x3bc/0x420 [snd_emu10k1] snd_pcm_hw_params+0x29f/0x600 [snd_pcm] snd_pcm_common_ioctl+0x188/0x1410 [snd_pcm] ? exit_to_user_mode_prepare+0x35/0x170 ? do_syscall_64+0x69/0x90 ? syscall_exit_to_user_mode+0x26/0x50 ? do_syscall_64+0x69/0x90 ? exit_to_user_mode_prepare+0x35/0x170 snd_pcm_ioctl+0x27/0x40 [snd_pcm] __x64_sys_ioctl+0x95/0xd0 do_syscall_64+0x5c/0x90 ? do_syscall_64+0x69/0x90 ? do_syscall_64+0x69/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.19.11-1DEBIAN-CVE-2022-48702
Debian:13linux5.19.11-1DEBIAN-CVE-2022-48702
Debian:14linux5.19.11-1DEBIAN-CVE-2022-48702
Ubuntu:22.04:LTSlinux5.15.0-57.63UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-aws5.15.0-1027.31UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-azure5.15.0-1030.37UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1030.37.1UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-gcp5.15.0-1026.33UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-gke5.15.0-1024.29UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1012.16UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-ibm5.15.0-1022.25UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1023.28UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-kvm5.15.0-1025.30UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-57.63UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1015.15UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-oracle5.15.0-1026.32UBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-raspi5.15.0-1022.24UBUNTU-CVE-2022-48702
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-48702
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-48702

Affected products (as reported)

VendorProductVersions
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 637c5310acb48fffcc5657568db3f3e9bc719bfa1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 6b0e260ac3cf289e38446552461caa65e6dab2751da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 88aac6684cf8bc885cca15463cb4407e91f28ff71da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 45321a7d02b7cf9b3f97e3987fc1e4d649b82da21da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 39a90720f3abe96625d1224e7a7463410875de4c1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 45814a53514e10a8014906c882e0d0d38df39cc11da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 4204a01ffce97cae1d59edc5848f02be5b2b91781da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before d29f59051d3a07b81281b2df2b8c9dfe4716067f
Linux Linux 2.6.12

References