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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
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | May 3, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 3, 2024 |
| Suse | — | Upgrade kernel-rt-vdsoUpgrade kernel-preemptUpgrade kernel-default-extraUpgrade kernel-kvmsmall-develUpgrade kernel-default-optionalUpgrade kernel-rt-develUpgrade kernel-default-base-rebuildUpgrade kernel-rt_debug-develUpgrade kernel-symsUpgrade dtb-apmUpgrade gfs2-kmp-azureUpgrade kernel-source-vanillaUpgrade dlm-kmp-64kbUpgrade kernel-syms-azureUpgrade kernel-rt-livepatchUpgrade kernel-macrosUpgrade dtb-alteraUpgrade dtb-amazonUpgrade kernel-sourceUpgrade gfs2-kmp-rtUpgrade kernel-default-develUpgrade kernel-develUpgrade cluster-md-kmp-azureUpgrade kernel-kvmsmallUpgrade kernel-rtUpgrade kernel-azure-optionalUpgrade kernel-default-vdsoUpgrade dtb-exynosUpgrade kernel-azure-livepatch-develUpgrade cluster-md-kmp-rtUpgrade dtb-caviumUpgrade kernel-devel-azureUpgrade ocfs2-kmp-64kbUpgrade kselftests-kmp-64kbUpgrade kernel-azure-develUpgrade ocfs2-kmp-defaultUpgrade dtb-mediatekUpgrade kernel-default-livepatchUpgrade ocfs2-kmp-rtUpgrade kernel-obs-qaUpgrade reiserfs-kmp-azureUpgrade dtb-rockchipUpgrade gfs2-kmp-64kbUpgrade dtb-xilinxUpgrade kernel-64kbUpgrade kernel-devel-rtUpgrade kernel-64kb-livepatch-develUpgrade dtb-lgUpgrade dtb-amlogicUpgrade dtb-freescaleUpgrade kernel-zfcpdumpUpgrade dtb-qcomUpgrade kselftests-kmp-azureUpgrade dtb-allwinnerUpgrade kernel-source-azureUpgrade dtb-amdUpgrade kernel-rt_debug-vdsoUpgrade kernel-rt-extraUpgrade kernel-source-rtUpgrade kernel-debugUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-debug-develUpgrade dlm-kmp-azureUpgrade cluster-md-kmp-defaultUpgrade kernel-rt_debugUpgrade kernel-kvmsmall-vdsoUpgrade kernel-rt-optionalUpgrade kselftests-kmp-defaultUpgrade dtb-armUpgrade kernel-docsUpgrade kernel-rt-livepatch-develUpgrade dtb-sprdUpgrade kernel-syms-rtUpgrade dtb-appleUpgrade kernel-default-livepatch-develUpgrade reiserfs-kmp-defaultUpgrade cluster-md-kmp-64kbUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-defaultUpgrade kernel-64kb-optionalUpgrade dtb-nvidiaUpgrade dlm-kmp-defaultUpgrade gfs2-kmp-defaultUpgrade kernel-default-baseUpgrade dtb-marvellUpgrade kernel-docs-htmlUpgrade kernel-azure-vdsoUpgrade kernel-default-manUpgrade kernel-debug-vdsoUpgrade kernel-debug-livepatch-develUpgrade kernel-64kb-develUpgrade dtb-socionextUpgrade dtb-hisiliconUpgrade dtb-broadcomUpgrade dlm-kmp-rtUpgrade kernel-preempt-develUpgrade kernel-obs-buildUpgrade kernel-azure-extraUpgrade kernel-64kb-extraUpgrade dtb-renesasUpgrade reiserfs-kmp-64kbUpgrade ocfs2-kmp-azureUpgrade kselftests-kmp-rtUpgrade kernel-azure-baseUpgrade kernel-azureUpgrade reiserfs-kmp-rt | Aug 9, 2024 | May 3, 2024 |
| Ubuntu | — | Upgrade linux-azure-fipsUpgrade linux-intel-iotg-5.15Upgrade linux-awsUpgrade linux-lowlatencyUpgrade linux-gkeUpgrade linux-gkeop-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-azure-5.15Upgrade linux-hweUpgrade linuxUpgrade linux-aws-hweUpgrade linux-iotUpgrade linux-hwe-5.15Upgrade linux-gcp-4.15Upgrade linux-raspiUpgrade linux-oracle-5.15Upgrade linux-azure-4.15Upgrade linux-azure-fdeUpgrade linux-aws-5.15Upgrade linux-aws-5.4Upgrade linux-realtimeUpgrade linux-gkeopUpgrade linux-azure-5.4Upgrade linux-azureUpgrade linux-gcp-5.15Upgrade linux-oracleUpgrade linux-ibmUpgrade linux-gcpUpgrade linux-aws-fipsUpgrade linux-riscv-5.15Upgrade linux-nvidiaUpgrade linux-oracle-5.4Upgrade linux-ibm-5.4Upgrade linux-kvmUpgrade linux-intel-iotgUpgrade linux-hwe-5.4Upgrade linux-raspi-5.4Upgrade linux-fipsUpgrade linux-gcp-5.4Upgrade linux-bluefieldUpgrade linux-gcp-fips | Nov 19, 2024 | May 3, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | May 3, 2024 |
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