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NVD / CVE Program· CNA Linux

CVE-2026-63838: ASoC: rsnd: Fix potential out-of-bounds access of component_dais[]

HighCVSS 7.1 · v3.1—No exploit Fix available

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: 0.18% (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 134c61925e9e9ee0f4fdbab5c3984d5bb024f5f5, 15e7b2ac2455995a6af02b9d3da7a432837aaf72, 9f1daac27ca28e98c8c0e4450de42bb68d547250.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 134c61925e9e9ee0f4fdbab5c3984d5bb024f5f5, 15e7b2ac2455995a6af02b9d3da7a432837aaf72, 9f1daac27ca28e98c8c0e4450de42bb68d547250 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: ASoC: rsnd: Fix potential out-of-bounds access of component_dais[] component_dais[RSND_MAX_COMPONENT] is initially zero-initialized and later populated in rsnd_dai_of_node(). However, the existing boundary check: if (i >= RSND_MAX_COMPONENT) does not guarantee that the last valid element remains zero. As a result, the loop can rely on component_dais[RSND_MAX_COMPONENT] being zero, which may lead to an out-of-bounds access. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Published
Jul 19, 2026
Updated
Nov 12, 2026
EPSS
0.1% · 8th 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%

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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Follow CVE-2026-63838

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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

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

    • 6.6affected
    • 547b02f74e4ac1e7d295a6266d5bc93a647cd4ac and later · before 9f1daac27ca28e98c8c0e4450de42bb68d547250affected · git
    • 547b02f74e4ac1e7d295a6266d5bc93a647cd4ac and later · before 15e7b2ac2455995a6af02b9d3da7a432837aaf72affected · git
    • 547b02f74e4ac1e7d295a6266d5bc93a647cd4ac and later · before 134c61925e9e9ee0f4fdbab5c3984d5bb024f5f5affected · git
    • 547b02f74e4ac1e7d295a6266d5bc93a647cd4ac and later · before a62b3e6e42359a79158c134e3cf5c74fe160c3f5affected · git
    • 547b02f74e4ac1e7d295a6266d5bc93a647cd4ac and later · before f9e437cddf6cf9e603bdaefe148c1f4792aaf39caffected · git
    • before 6.6not affected · semver
    • 6.6.141 and later · up to and including 6.6.*not affected · semver
    • 6.12.91 and later · up to and including 6.12.*not affected · semver
    • 6.18.33 and later · up to and including 6.18.*not affected · semver
Affected versions · NVD (4)

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

  • linux linux kernel6.6 and later · before 6.6.141
  • linux linux kernel6.7 and later · before 6.12.91
  • linux linux kernel6.13 and later · before 6.18.33
  • linux linux kernel6.19 and later · before 7.0.10

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.10-17.0.10-1
openSUSE:Leap 16.0dtb-aarch64before 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-64kbbefore 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-azurebefore 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-defaultbefore 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-default-basebefore 6.12.0-160000.39.1.160000.2.256.12.0-160000.39.1.160000.2.25
openSUSE:Leap 16.0kernel-docsbefore 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-kvmsmallbefore 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-obs-buildbefore 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-obs-qabefore 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-rtbefore 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-sourcebefore 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-symsbefore 6.12.0-160000.39.16.12.0-160000.39.1
openSUSE:Leap 16.0kernel-zfcpdumpbefore 6.12.0-160000.39.16.12.0-160000.39.1
SUSE:Linux Enterprise Server 16.0kernel-azurebefore 6.12.0-160000.39.16.12.0-160000.39.1
SUSE:Linux Enterprise Server 16.0kernel-docsbefore 6.12.0-160000.39.16.12.0-160000.39.1
SUSE:Linux Enterprise Server 16.0kernel-kvmsmallbefore 6.12.0-160000.39.16.12.0-160000.39.1
SUSE:Linux Enterprise Server 16.0kernel-obs-qabefore 6.12.0-160000.39.16.12.0-160000.39.1
SUSE:Linux Enterprise Server 16.0kernel-zfcpdumpbefore 6.12.0-160000.39.16.12.0-160000.39.1
SUSE:Linux Micro 6.2kernel-64kbbefore 6.12.0-160000.39.16.12.0-160000.39.1
SUSE:Linux Micro 6.2kernel-defaultbefore 6.12.0-160000.39.16.12.0-160000.39.1
SUSE:Linux Micro 6.2kernel-default-basebefore 6.12.0-160000.39.1.160000.2.266.12.0-160000.39.1.160000.2.26
SUSE:Linux Micro 6.2kernel-rtbefore 6.12.0-160000.39.16.12.0-160000.39.1

+3

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • 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

Published before and after this one in the same product

  • ← EarlierCVE-2026-64181Jul 19, 2026 · mm: fix __vm_normal_page() to handle missing support for pmd_special()/pud_special()
    31Monitor
  • ← EarlierCVE-2026-63837Jul 19, 2026 · net: ena: PHC: Check return code before setting timestamp output
    22Monitor
  • Later →CVE-2026-63839Jul 19, 2026 · platform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int()
    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 Linux134c61925e9e9ee0f4fdbab5c3984d5bb024f5f5Vendor (CNA)
Linux Linux15e7b2ac2455995a6af02b9d3da7a432837aaf72Vendor (CNA)
Linux Linux9f1daac27ca28e98c8c0e4450de42bb68d547250Vendor (CNA)
Linux Linuxa62b3e6e42359a79158c134e3cf5c74fe160c3f5Vendor (CNA)
Linux Linuxf9e437cddf6cf9e603bdaefe148c1f4792aaf39cVendor (CNA)
debian:linux6.12.94-1 · Debian:13Package registry (OSV)
opensuse:dtb-aarch646.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-64kb6.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-azure6.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default6.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default-base6.12.0-160000.39.1.160000.2.25 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-docs6.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-kvmsmall6.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-build6.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-qa6.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-rt6.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-source6.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-syms6.12.0-160000.39.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:kernel-64kb6.12.0-160000.39.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-azure6.12.0-160000.39.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-default6.12.0-160000.39.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default-base6.12.0-160000.39.1.160000.2.26 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-docs6.12.0-160000.39.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-kvmsmall6.12.0-160000.39.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-obs-build6.12.0-160000.39.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-obs-qa6.12.0-160000.39.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-rt6.12.0-160000.39.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-source6.12.0-160000.39.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-syms6.12.0-160000.39.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-zfcpdump6.12.0-160000.39.1 · SUSE:Linux Enterprise Server 16.0Package 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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
high · data can be read
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
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

ATT&CK techniques

—

Change log

  1. CVSS— → 7.1
  2. Severity— → high
  3. Fix✗ → ✓

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

References

Show all references (4 more)

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

All records