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CVE-2022-48702· NVD / CVE Program· CNA Linux

ALSA: emu10k1: Fix out of bounds access in snd_emu10k1_pcm_channel_alloc()

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.23% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 39a90720f3abe96625d1224e7a7463410875de4c, 4204a01ffce97cae1d59edc5848f02be5b2b9178, 45321a7d02b7cf9b3f97e3987fc1e4d649b82da2.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 39a90720f3abe96625d1224e7a7463410875de4c, 4204a01ffce97cae1d59edc5848f02be5b2b9178, 45321a7d02b7cf9b3f97e3987fc1e4d649b82da2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 3, 2024
Updated
Aug 5, 2026
EPSS
0.2% · 13th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.8
CNA · Linux
7.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelbefore 4.9.328
  • linux linux kernel4.10 and later · before 4.14.293
  • linux linux kernel4.15 and later · before 4.19.258
  • linux linux kernel4.20 and later · before 5.4.213
  • linux linux kernel5.5 and later · before 5.10.143
  • linux linux kernel5.11 and later · before 5.15.68
  • linux linux kernel5.17 and later · before 5.19.9
  • linux linux kernel6.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 637c5310acb48fffcc5657568db3f3e9bc719bfaaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 6b0e260ac3cf289e38446552461caa65e6dab275affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 88aac6684cf8bc885cca15463cb4407e91f28ff7affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 45321a7d02b7cf9b3f97e3987fc1e4d649b82da2affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 39a90720f3abe96625d1224e7a7463410875de4caffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 45814a53514e10a8014906c882e0d0d38df39cc1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 4204a01ffce97cae1d59edc5848f02be5b2b9178affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before d29f59051d3a07b81281b2df2b8c9dfe4716067faffected · git
    • before 2.6.12not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.19.11-15.19.11-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-48699May 3, 2024 · sched/debug: fix dentry leak in update_sched_domain_debugfs
    22Monitor
  • ← EarlierCVE-2022-48701May 3, 2024 · ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface()
    28Monitor
  • Later →CVE-2022-48703May 3, 2024 · thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux39a90720f3abe96625d1224e7a7463410875de4cVendor (CNA)
Linux Linux4204a01ffce97cae1d59edc5848f02be5b2b9178Vendor (CNA)
Linux Linux45321a7d02b7cf9b3f97e3987fc1e4d649b82da2Vendor (CNA)
Linux Linux45814a53514e10a8014906c882e0d0d38df39cc1Vendor (CNA)
Linux Linux637c5310acb48fffcc5657568db3f3e9bc719bfaVendor (CNA)
Linux Linux6b0e260ac3cf289e38446552461caa65e6dab275Vendor (CNA)
Linux Linux88aac6684cf8bc885cca15463cb4407e91f28ff7Vendor (CNA)
Linux Linuxd29f59051d3a07b81281b2df2b8c9dfe4716067fVendor (CNA)
debian:linux5.19.11-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2021-4754821 days apartethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()
    39Monitor
  • CVE-2023-2008385 days apartKernel: udmabuf: improper validation of array index leading to local privilege escalation
    32Monitor
  • CVE-2023-526492 days apartdrm/vkms: Avoid reading beyond LUT array
    31Monitor
  • CVE-2024-269812 days apartnilfs2: fix OOB in nilfs_set_de_type
    31Monitor
  • CVE-2024-2691416 days apartdrm/amd/display: fix incorrect mpc_combine array size
    31Monitor
  • CVE-2024-3590516 days apartbpf: Protect against int overflow for stack access size
    31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-129 · Improper Validation of Array Index

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records