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NVD / CVE Program· CNA Linux

CVE-2025-68783: ALSA: usb-mixer: us16x08: validate meter packet indices

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 2168866396bd28ec4f3c8da0fbc7d08b5bd4f053, 2f21a7cbaaa93926f5be15bc095b9c57c35748d9, 53461710a95e15ac1f6542450943a492ecf8e550; 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 2168866396bd28ec4f3c8da0fbc7d08b5bd4f053, 2f21a7cbaaa93926f5be15bc095b9c57c35748d9, 53461710a95e15ac1f6542450943a492ecf8e550; 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: usb-mixer: us16x08: validate meter packet indices get_meter_levels_from_urb() parses the 64-byte meter packets sent by the device and fills the per-channel arrays meter_level[], comp_level[] and master_level[] in struct snd_us16x08_meter_store. Currently the function derives the channel index directly from the meter packet (MUB2(meter_urb, s) - 1) and uses it to index those arrays without validating the range. If the packet contains a negative or out-of-range channel number, the driver may write past the end of these arrays. Introduce a local channel variable and validate it before updating the arrays. We reject negative indices, limit meter_level[] and comp_level[] to SND_US16X08_MAX_CHANNELS, and guard master_level[] updates with ARRAY_SIZE(master_level).

—No exploit Fix available
Published
Jan 13, 2026
Updated
Jun 17, 2026
EPSS
0.2% · 10th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • 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.

—

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

    • 4.11affected
    • d2bb390a2081a36ffe906724d2848d846f2aeb29 and later · before 53461710a95e15ac1f6542450943a492ecf8e550affected · git
    • d2bb390a2081a36ffe906724d2848d846f2aeb29 and later · before 2168866396bd28ec4f3c8da0fbc7d08b5bd4f053affected · git
    • d2bb390a2081a36ffe906724d2848d846f2aeb29 and later · before cde47f4ccad6751ac36b7471572ddf38ee91870caffected · git
    • d2bb390a2081a36ffe906724d2848d846f2aeb29 and later · before 2f21a7cbaaa93926f5be15bc095b9c57c35748d9affected · git
    • d2bb390a2081a36ffe906724d2848d846f2aeb29 and later · before a8ad320efb663be30b794e3dd3e829301c0d0ed3affected · git
    • d2bb390a2081a36ffe906724d2848d846f2aeb29 and later · before eaa95228b8a56c4880a182c0350d67922b22408faffected · git
    • d2bb390a2081a36ffe906724d2848d846f2aeb29 and later · before 5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1eaffected · git
    • before 4.11not affected · semver
    • 5.10.248 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.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.3-16.18.3-1

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-2025-68780Jan 13, 2026 · sched/deadline: only set free_cpus for online runqueues
    0Monitor
  • ← EarlierCVE-2025-68781Jan 13, 2026 · usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal
    0Monitor
  • Later →CVE-2025-68784Jan 13, 2026 · xfs: fix a UAF problem in xattr repair
    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 Linux2168866396bd28ec4f3c8da0fbc7d08b5bd4f053Vendor (CNA)
Linux Linux2f21a7cbaaa93926f5be15bc095b9c57c35748d9Vendor (CNA)
Linux Linux53461710a95e15ac1f6542450943a492ecf8e550Vendor (CNA)
Linux Linux5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1eVendor (CNA)
Linux Linuxa8ad320efb663be30b794e3dd3e829301c0d0ed3Vendor (CNA)
Linux Linuxcde47f4ccad6751ac36b7471572ddf38ee91870cVendor (CNA)
Linux Linuxeaa95228b8a56c4880a182c0350d67922b22408fVendor (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.

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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. Fix✗ → ✓

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References

Show all references (6 more)

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

All records