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NVD / CVE Program· CNA Linux

CVE-2026-74497: ALSA: usb-audio: Clamp frame size in implicit-feedback mode

Noroxi assessment

Priority: Monitor (action score 33/100)

  • 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: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 09cf3dbbb4256a43feb91d2f51f274510a9ada47, 2d39fea6d3c19a2f5811d123114d92e3d0115fd1, 2db4535d6af79276a64449201c5be5feffb31c64; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 09cf3dbbb4256a43feb91d2f51f274510a9ada47, 2d39fea6d3c19a2f5811d123114d92e3d0115fd1, 2db4535d6af79276a64449201c5be5feffb31c64; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1 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: usb-audio: Clamp frame size in implicit-feedback mode snd_usb_handle_sync_urb() scales received sync packet sizes by the sender's stride and stores the result directly in out_packet->packet_size[i]. If a connected USB device sends an oversized sync packet, this frame count can exceed ep->maxframesize. The un-clamped frame count then propagates to the playback endpoint queue, potentially driving packet transfers beyond the endpoint's hardware frame limits. Cap the calculated frame count against ep->maxframesize in snd_usb_handle_sync_urb() to prevent oversized packets from entering the playback queue.

HighCVSS 8.4 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.1% · 3th percentile
CWE
—

Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
33 / 40 · 8.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
8.4
NVD has not scored this yet; the score shown is the CNA’s.

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

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

Follow CVE-2026-74497

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.

—

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

    • 3.8affected
    • 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and later · before 2d39fea6d3c19a2f5811d123114d92e3d0115fd1affected · git
    • 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and later · before 09cf3dbbb4256a43feb91d2f51f274510a9ada47affected · git
    • 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and later · before cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7beaffected · git
    • 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and later · before 56ac3e7c90f6b45969c3fd07a98fad760ffd6901affected · git
    • 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and later · before be97fea7451d758881b95af78e900dd0d58a382aaffected · git
    • 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and later · before 2db4535d6af79276a64449201c5be5feffb31c64affected · git
    • 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and later · before 53f0aa37eb945f3c983f61d12fc35eb33debb8a9affected · git
    • 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and later · before 8d7a30c50c2e58a6839634ed0acde14466d1dc61affected · git
    • before 3.8not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.8-17.1.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-74495Aug 15, 2026 · igbvf: Fix leak in TX DMA error cleanup
    39Monitor
  • ← EarlierCVE-2026-74496Aug 15, 2026 · fou: Fix use-after-free in fou_create()
    31Monitor
  • Later →CVE-2026-74498Aug 15, 2026 · ALSA: usb-audio: Fix DMA buffer out-of-bounds write when fill_max is set
    0Monitor

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 Linux09cf3dbbb4256a43feb91d2f51f274510a9ada47Vendor (CNA)
Linux Linux2d39fea6d3c19a2f5811d123114d92e3d0115fd1Vendor (CNA)
Linux Linux2db4535d6af79276a64449201c5be5feffb31c64Vendor (CNA)
Linux Linux53f0aa37eb945f3c983f61d12fc35eb33debb8a9Vendor (CNA)
Linux Linux56ac3e7c90f6b45969c3fd07a98fad760ffd6901Vendor (CNA)
Linux Linux8d7a30c50c2e58a6839634ed0acde14466d1dc61Vendor (CNA)
Linux Linuxbe97fea7451d758881b95af78e900dd0d58a382aVendor (CNA)
Linux Linuxcfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7beVendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.152.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · 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.

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).

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.
  • No account or password is required.
  • 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
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-secondary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. 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