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NVD / CVE Program· CNA Linux

CVE-2025-68753: ALSA: firewire-motu: add bounds check in put_user loop for DSP events

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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: 0.17% (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 0d71b3c2ed742f1ccb3b0b7a61afb90c0251093f, 298e753880b6ea99ac30df34959a7a03b0878eed, 6d4f17782ce4facf3197e79707df411ee3d7b30a; azl3 kernel 6.6.119.3-3 on Azure Linux 3.0 6.6.121.1-1.

Low priority for now. Upgrade to Linux Linux 0d71b3c2ed742f1ccb3b0b7a61afb90c0251093f, 298e753880b6ea99ac30df34959a7a03b0878eed, 6d4f17782ce4facf3197e79707df411ee3d7b30a; azl3 kernel 6.6.119.3-3 on Azure Linux 3.0 6.6.121.1-1 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: firewire-motu: add bounds check in put_user loop for DSP events In the DSP event handling code, a put_user() loop copies event data. When the user buffer size is not aligned to 4 bytes, it could overwrite beyond the buffer boundary. Fix by adding a bounds check before put_user().

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
Jan 5, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 6th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.1
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-2025-68753

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

    • 5.16affected
    • 634ec0b2906efd46f6f57977e172aa3470aca432 and later · before ea2c921d9de6e32ca50cb817b9d57bb881be70deaffected · git
    • 634ec0b2906efd46f6f57977e172aa3470aca432 and later · before 6d4f17782ce4facf3197e79707df411ee3d7b30aaffected · git
    • 634ec0b2906efd46f6f57977e172aa3470aca432 and later · before 0d71b3c2ed742f1ccb3b0b7a61afb90c0251093faffected · git
    • 634ec0b2906efd46f6f57977e172aa3470aca432 and later · before df692cf2b601a54b34edfdb9e683d67483aa8ce1affected · git
    • 634ec0b2906efd46f6f57977e172aa3470aca432 and later · before 8f9e51cf2a2a43d0cd72d3dc0b5ccea3f639c187affected · git
    • 634ec0b2906efd46f6f57977e172aa3470aca432 and later · before 298e753880b6ea99ac30df34959a7a03b0878eedaffected · git
    • before 5.16not affected · semver
    • 6.1.160 and later · up to and including 6.1.*not affected · semver
    • 6.6.120 and later · up to and including 6.6.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.63-16.12.63-1
Debian:14linuxbefore 6.17.13-16.17.13-1

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-2025-68757Jan 5, 2026 · drm/vgem-fence: Fix potential deadlock on release
    0Monitor
  • ← EarlierCVE-2025-68752Jan 5, 2026 · iavf: Implement settime64 with -EOPNOTSUPP
    0Monitor
  • Later →CVE-2025-68754Jan 5, 2026 · rtc: amlogic-a4: fix double free caused by devm
    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 Linux0d71b3c2ed742f1ccb3b0b7a61afb90c0251093fVendor (CNA)
Linux Linux298e753880b6ea99ac30df34959a7a03b0878eedVendor (CNA)
Linux Linux6d4f17782ce4facf3197e79707df411ee3d7b30aVendor (CNA)
Linux Linux8f9e51cf2a2a43d0cd72d3dc0b5ccea3f639c187Vendor (CNA)
Linux Linuxdf692cf2b601a54b34edfdb9e683d67483aa8ce1Vendor (CNA)
Linux Linuxea2c921d9de6e32ca50cb817b9d57bb881be70deVendor (CNA)
azl3 kernel 6.6.119.3-3 on Azure Linux 3.06.6.121.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.162-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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-2025-688118 days apartsvcrdma: use rc_pageoff for memcpy byte offset
    39Monitor
  • CVE-2026-72098222 days apartdm-verity: fix buffer overflow in FEC calculation
    39Monitor
  • CVE-2026-68128217 days apartice: reject out-of-range ptype in ice_parser_profile_init
    35Monitor
  • CVE-2026-64515201 days apartwifi: mac80211: fix MLE defragmentation
    33Monitor
  • CVE-2026-64552203 days apartvirtio-net: fix len check in receive_big()
    33Monitor
  • CVE-2026-68376217 days apartsctp: fix auth_hmacs array size in struct sctp_cookie
    32Monitor

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
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
None
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 (5 more)

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

All records