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CVE-2024-56532· NVD / CVE Program· CNA Linux

ALSA: us122l: Use snd_card_free_when_closed() at disconnection

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.21% (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 020cbc4d7414f0962004213e2b7bc5cc607e9ec7, 2938dd2648522336133c151dd67bb9bf01cbd390, 75f418b249d84021865eaa59515d3ed9b75ce4d6.

Low priority for now. Upgrade to Linux Linux 020cbc4d7414f0962004213e2b7bc5cc607e9ec7, 2938dd2648522336133c151dd67bb9bf01cbd390, 75f418b249d84021865eaa59515d3ed9b75ce4d6 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: us122l: Use snd_card_free_when_closed() at disconnection The USB disconnect callback is supposed to be short and not too-long waiting. OTOH, the current code uses snd_card_free() at disconnection, but this waits for the close of all used fds, hence it can take long. It eventually blocks the upper layer USB ioctls, which may trigger a soft lockup. An easy workaround is to replace snd_card_free() with snd_card_free_when_closed(). This variant returns immediately while the release of resources is done asynchronously by the card device release at the last close. The loop of us122l->mmap_count check is dropped as well. The check is useless for the asynchronous operation with *_when_closed().

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Dec 27, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 11th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 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.

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-56532

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • 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 kernel2.6.28 and later · before 4.19.325
  • linux linux kernel4.20 and later · before 5.4.287
  • linux linux kernel5.5 and later · before 5.10.231
  • linux linux kernel5.11 and later · before 5.15.174
  • linux linux kernel5.16 and later · before 6.1.120
  • linux linux kernel6.2 and later · before 6.6.64
  • linux linux kernel6.7 and later · before 6.11.11
  • linux linux kernel6.12 and later · before 6.12.2

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

    • 2.6.28affected
    • 030a07e441296c372f946cd4065b5d831d8dc40c and later · before 020cbc4d7414f0962004213e2b7bc5cc607e9ec7affected · git
    • 030a07e441296c372f946cd4065b5d831d8dc40c and later · before 75f418b249d84021865eaa59515d3ed9b75ce4d6affected · git
    • 030a07e441296c372f946cd4065b5d831d8dc40c and later · before bf0aa35a7cb8602cccf2387712114e836f65c154affected · git
    • 030a07e441296c372f946cd4065b5d831d8dc40c and later · before 9a48bd2184b142c92a4e17eac074c61fcf975bc9affected · git
    • 030a07e441296c372f946cd4065b5d831d8dc40c and later · before bc778ad3e495333eebda36fe91d5b2c93109cc16affected · git
    • 030a07e441296c372f946cd4065b5d831d8dc40c and later · before 2938dd2648522336133c151dd67bb9bf01cbd390affected · git
    • 030a07e441296c372f946cd4065b5d831d8dc40c and later · before 9b27924dc8d7f8a8c35e521287d4ccb9a006e597affected · git
    • 030a07e441296c372f946cd4065b5d831d8dc40c and later · before 9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38affected · git
    • 030a07e441296c372f946cd4065b5d831d8dc40c and later · before b7df09bb348016943f56b09dcaafe221e3f73947affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.123-16.1.123-1
Debian:13linuxbefore 6.12.3-16.12.3-1
SUSE:Linux Enterprise Live Patching 12 SP5kernel-defaultbefore 4.12.14-122.247.14.12.14-122.247.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_65before 1-8.3.11-8.3.1
SUSE:Linux Enterprise Server 12 SP5-LTSSkernel-sourcebefore 4.12.14-122.247.14.12.14-122.247.1
SUSE:Linux Enterprise Server 12 SP5-LTSSkernel-symsbefore 4.12.14-122.247.14.12.14-122.247.1

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-2024-53239Dec 27, 2024 · ALSA: 6fire: Release resources at card release
    31Monitor
  • ← EarlierCVE-2024-56531Dec 27, 2024 · ALSA: caiaq: Use snd_card_free_when_closed() at disconnection
    22Monitor
  • Later →CVE-2024-56533Dec 27, 2024 · ALSA: usx2y: Use snd_card_free_when_closed() at disconnection
    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 Linux020cbc4d7414f0962004213e2b7bc5cc607e9ec7Vendor (CNA)
Linux Linux2938dd2648522336133c151dd67bb9bf01cbd390Vendor (CNA)
Linux Linux75f418b249d84021865eaa59515d3ed9b75ce4d6Vendor (CNA)
Linux Linux9a48bd2184b142c92a4e17eac074c61fcf975bc9Vendor (CNA)
Linux Linux9b27924dc8d7f8a8c35e521287d4ccb9a006e597Vendor (CNA)
Linux Linux9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38Vendor (CNA)
Linux Linuxb7df09bb348016943f56b09dcaafe221e3f73947Vendor (CNA)
Linux Linuxbc778ad3e495333eebda36fe91d5b2c93109cc16Vendor (CNA)
Linux Linuxbf0aa35a7cb8602cccf2387712114e836f65c154Vendor (CNA)
debian:linux6.1.123-1 · Debian:12Package registry (OSV)
suse:kernel-default4.12.14-122.247.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package registry (OSV)
suse:kernel-source4.12.14-122.247.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:kernel-syms4.12.14-122.247.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_651-8.3.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package 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.

No nightly-computed relations.

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).

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

Weakness class (CWE)

CWE-667 · Improper Locking

CVSS vector

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

Change log

  1. Fix✗ → ✓

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

References

Show all references (10 more)

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

All records