7.8

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

Modified
AliasesUBUNTU-CVE-2022-48702DEBIAN-CVE-2022-48702
Published 03-05-2024Last modified 05-08-2026

Vulnerability summary

CVE-2022-48702 is a high (CVSS 7.8) Improper Validation of Array Index vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 11 · Related 11
SUSE-SU-2024:1642-1SUSE-SU-2024:1643-1SUSE-SU-2024:1644-1SUSE-SU-2024:1645-1SUSE-SU-2024:1659-1SUSE-SU-2024:1663-1

Timeline

  1. 03-05-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu102 products
  • linuxAll versions (No fix recorded) | < 4.15.0-201.212 | < 5.4.0-136.153 | < 5.15.0-57.63
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1147.159 | < 5.4.0-1093.101 | < 5.15.0-1027.31
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 637c5310acb48fffcc5657568db3f3e9bc719bfa | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6b0e260ac3cf289e38446552461caa65e6dab275 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 88aac6684cf8bc885cca15463cb4407e91f28ff7 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 45321a7d02b7cf9b3f97e3987fc1e4d649b82da2 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 39a90720f3abe96625d1224e7a7463410875de4c | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 45814a53514e10a8014906c882e0d0d38df39cc1 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4204a01ffce97cae1d59edc5848f02be5b2b9178 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d29f59051d3a07b81281b2df2b8c9dfe4716067f | 2.6.12
  • linux_kernel< 4.9.328 | ≥ 4.10, < 4.14.293 | ≥ 4.15, < 4.19.258 | ≥ 4.20, < 5.4.213 | ≥ 5.5, < 5.10.143 | ≥ 5.11, < 5.15.68 | ≥ 5.17, < 5.19.9 | 6.0:rc1 | 6.0:rc2 | 6.0:rc3 | 6.0:rc4
Debian1 product
  • linux< 5.19.11-1

3 vendors · 105 products

References

12 links
Show all 12 references