CVE-2024-56533· NVD / CVE Program· CNA Linux

ALSA: usx2y: 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 24fe9f7ca83ec9acf765339054951f5cd9ae5c5d, 7bd8838c0ea886679a32834fdcacab296d072fbe, befcca1777525e37c659b4129d8ac7463b07ef67.

Low priority for now. Upgrade to Linux Linux 24fe9f7ca83ec9acf765339054951f5cd9ae5c5d, 7bd8838c0ea886679a32834fdcacab296d072fbe, befcca1777525e37c659b4129d8ac7463b07ef67 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: usx2y: 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.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Denial of service

Published: Dec 27, 2024
Updated: Jun 17, 2026
EPSS: 0.2% · 10th percentile
CWE: CWE-667

Report tools

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Action score

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

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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

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

linux linux kernel2.6.13 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
- 2.6.13affected
- 230cd5e24853ed4dd960461989b8ed0986d37a99 and later · before 24fe9f7ca83ec9acf765339054951f5cd9ae5c5daffected · git
- 230cd5e24853ed4dd960461989b8ed0986d37a99 and later · before befcca1777525e37c659b4129d8ac7463b07ef67affected · git
- 230cd5e24853ed4dd960461989b8ed0986d37a99 and later · before 7bd8838c0ea886679a32834fdcacab296d072fbeaffected · git
- 230cd5e24853ed4dd960461989b8ed0986d37a99 and later · before e07605d855c4104d981653146a330ea48f6266edaffected · git
- 230cd5e24853ed4dd960461989b8ed0986d37a99 and later · before ffbfc6c4330fc233698529656798bee44fea96f5affected · git
- 230cd5e24853ed4dd960461989b8ed0986d37a99 and later · before e869642a77a9b3b98b0ab2c8fec7af4385140909affected · git
- 230cd5e24853ed4dd960461989b8ed0986d37a99 and later · before dafb28f02be407e07a6f679e922a626592b481b0affected · git
- before 2.6.13not affected · semver
- 5.10.231 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.123-1	6.1.123-1
Debian:13	linux	before 6.12.3-1	6.12.3-1
SUSE:Linux Enterprise Live Patching 12 SP5	kernel-default	before 4.12.14-122.247.1	4.12.14-122.247.1
SUSE:Linux Enterprise Live Patching 12 SP5	kgraft-patch-SLE12-SP5_Update_65	before 1-8.3.1	1-8.3.1
SUSE:Linux Enterprise Server 12 SP5-LTSS	kernel-source	before 4.12.14-122.247.1	4.12.14-122.247.1
SUSE:Linux Enterprise Server 12 SP5-LTSS	kernel-syms	before 4.12.14-122.247.1	4.12.14-122.247.1

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-2024-56531Dec 27, 2024 · ALSA: caiaq: Use snd_card_free_when_closed() at disconnection
22Monitor
← EarlierCVE-2024-56532Dec 27, 2024 · ALSA: us122l: Use snd_card_free_when_closed() at disconnection
22Monitor
Later →CVE-2024-56534Dec 27, 2024 · isofs: avoid memory leak in iocharset
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 / package	Fixed version	Source
Linux Linux	24fe9f7ca83ec9acf765339054951f5cd9ae5c5d	Vendor (CNA)
Linux Linux	7bd8838c0ea886679a32834fdcacab296d072fbe	Vendor (CNA)
Linux Linux	befcca1777525e37c659b4129d8ac7463b07ef67	Vendor (CNA)
Linux Linux	dafb28f02be407e07a6f679e922a626592b481b0	Vendor (CNA)
Linux Linux	e07605d855c4104d981653146a330ea48f6266ed	Vendor (CNA)
Linux Linux	e869642a77a9b3b98b0ab2c8fec7af4385140909	Vendor (CNA)
Linux Linux	ffbfc6c4330fc233698529656798bee44fea96f5	Vendor (CNA)
debian:linux	6.1.123-1 · Debian:12	Package registry (OSV)
suse:kernel-default	4.12.14-122.247.1 · SUSE:Linux Enterprise Live Patching 12 SP5	Package registry (OSV)
suse:kernel-source	4.12.14-122.247.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS	Package registry (OSV)
suse:kernel-syms	4.12.14-122.247.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS	Package registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_65	1-8.3.1 · SUSE:Linux Enterprise Live Patching 12 SP5	Package 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.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of Service: Application or System ExploitationT1499.004

Change log

Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

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

References

git.kernel.org/stable/c/24fe9f7ca83ec9acf765339054951f5cd9ae5c5d

Show all references (8 more)

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

All records