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NVD / CVE Program· CNA Linux

CVE-2023-52806: ALSA: hda: Fix possible null-ptr-deref when assigning a stream

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: 0.25% (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 2527775616f3638f4fd54649eba8c7b84d5e4250, 25354bae4fc310c3928e8a42fda2d486f67745d7, 43b91df291c8802268ab3cfd8fccfdf135800ed4.

Low priority for now. Upgrade to Linux Linux 2527775616f3638f4fd54649eba8c7b84d5e4250, 25354bae4fc310c3928e8a42fda2d486f67745d7, 43b91df291c8802268ab3cfd8fccfdf135800ed4 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: hda: Fix possible null-ptr-deref when assigning a stream While AudioDSP drivers assign streams exclusively of HOST or LINK type, nothing blocks a user to attempt to assign a COUPLED stream. As supplied substream instance may be a stub, what is the case when code-loading, such scenario ends with null-ptr-deref.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 21, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 17th percentile

Report tools

JSON

Action score

22

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

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

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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.

VendorProduct
linuxlinux kernel

Affected versions

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

  • linux linux kernelbefore 4.14.331
  • linux linux kernel4.15 and later · before 4.19.300
  • linux linux kernel4.20 and later · before 5.4.262
  • linux linux kernel5.5 and later · before 5.10.202
  • linux linux kernel5.11 and later · before 5.15.140
  • linux linux kernel5.16 and later · before 6.1.64
  • linux linux kernel6.2 and later · before 6.5.13
  • linux linux kernel6.6 and later · before 6.6.3

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

    • 4.2affected
    • 14752412721c61d9ac1e8d8fb51d7148cb15f85b and later · before 7de25112de8222fd20564769e6c99dc9f9738a0baffected · git
    • 14752412721c61d9ac1e8d8fb51d7148cb15f85b and later · before 758c7733cb821041f5fd403b7b97c0b95d319323affected · git
    • 14752412721c61d9ac1e8d8fb51d7148cb15f85b and later · before 2527775616f3638f4fd54649eba8c7b84d5e4250affected · git
    • 14752412721c61d9ac1e8d8fb51d7148cb15f85b and later · before 25354bae4fc310c3928e8a42fda2d486f67745d7affected · git
    • 14752412721c61d9ac1e8d8fb51d7148cb15f85b and later · before 631a96e9eb4228ff75fce7e72d133ca81194797eaffected · git
    • 14752412721c61d9ac1e8d8fb51d7148cb15f85b and later · before 43b91df291c8802268ab3cfd8fccfdf135800ed4affected · git
    • 14752412721c61d9ac1e8d8fb51d7148cb15f85b and later · before fe7c1a0c2b25c82807cb46fc3aadbf2664a682b0affected · git
    • 14752412721c61d9ac1e8d8fb51d7148cb15f85b and later · before 4a320da7f7cbdab2098b103c47f45d5061f42eddaffected · git
    • 14752412721c61d9ac1e8d8fb51d7148cb15f85b and later · before f93dc90c2e8ed664985e366aa6459ac83cdab236affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.64-16.1.64-1
Debian:13linuxbefore 6.6.8-16.6.8-1

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-2023-52804May 21, 2024 · fs/jfs: Add validity check for db_maxag and db_agpref
    31Monitor
  • ← EarlierCVE-2023-52805May 21, 2024 · jfs: fix array-index-out-of-bounds in diAlloc
    31Monitor
  • Later →CVE-2023-52807May 21, 2024 · net: hns3: fix out-of-bounds access may occur when coalesce info is read via debugfs
    31Monitor

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 Linux2527775616f3638f4fd54649eba8c7b84d5e4250Vendor (CNA)
Linux Linux25354bae4fc310c3928e8a42fda2d486f67745d7Vendor (CNA)
Linux Linux43b91df291c8802268ab3cfd8fccfdf135800ed4Vendor (CNA)
Linux Linux4a320da7f7cbdab2098b103c47f45d5061f42eddVendor (CNA)
Linux Linux631a96e9eb4228ff75fce7e72d133ca81194797eVendor (CNA)
Linux Linux758c7733cb821041f5fd403b7b97c0b95d319323Vendor (CNA)
Linux Linux7de25112de8222fd20564769e6c99dc9f9738a0bVendor (CNA)
Linux Linuxf93dc90c2e8ed664985e366aa6459ac83cdab236Vendor (CNA)
Linux Linuxfe7c1a0c2b25c82807cb46fc3aadbf2664a682b0Vendor (CNA)
debian:linux6.1.64-1 · 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

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-476 · NULL Pointer Dereference

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.

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

Change log

  1. Fix✗ → ✓

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

References

Show all references (8 more)

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

All records