CVE-2023-52988

Kernel memory corruption via unchecked negative index

Published Mar 27, 2025 · Updated Aug 5, 2026

Improper array-index validation in the VIA HDA codec driver in affected Linux kernel versions allows local users to corrupt kernel memory. The add_secret_dac_path() function treats a negative snd_hda_get_connections() result as an insertion index and writes a codec node before the conn stack array. Low-privileged local access and initialization of an affected VIA HDA codec path are required; the write can corrupt kernel memory or crash the system.

CVSS severity7.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper array-index validation in the VIA HDA codec driver in affected Linux kernel versions allows local users to corrupt kernel memory. The add_secret_dac_path() function treats a negative snd_hda_get_connections() result as an insertion index and writes a codec node before the conn stack array. Low-privileged local access and initialization of an affected VIA HDA codec path are required; the write can corrupt kernel memory or crash the system.

The record

CVE
CVE-2023-52988
Published
Mar 27, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=30b4503378c976cf66201a1e81820519f6bd79ac <1b9256c96220bcdba287eeeb90e7c910c77f8c46
  2. Affected versionversion=30b4503378c976cf66201a1e81820519f6bd79ac <2b557fa635e7487f638c0f030c305870839eeda2
  3. Affected versionversion=30b4503378c976cf66201a1e81820519f6bd79ac <437e50ef6290ac835d526d0e45f466a0aa69ba1b
  4. Affected versionversion=30b4503378c976cf66201a1e81820519f6bd79ac <6e1f586ddec48d71016b81acf68ba9f49ca54db8
  5. Affected versionversion=30b4503378c976cf66201a1e81820519f6bd79ac <b9cee506da2b7920b5ea02ccd8e78a907d0ee7aa
  6. Affected versionversion=30b4503378c976cf66201a1e81820519f6bd79ac <d6870f3800dbb212ae8433183ee82f566d067c6c
  7. Affected versionversion=30b4503378c976cf66201a1e81820519f6bd79ac <f011360ad234a07cb6fbcc720fff646a93a9f0d6
  8. Affected versionversion=3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=30b4503378c976cf66201a1e81820519f6bd79ac <1b9256c96220bcdba287eeeb90e7c910c77f8c46; version=30b4503378c976cf66201a1e81820519f6bd79ac <2b557fa635e7487f638c0f030c305870839eeda2; version=30b4503378c976cf66201a1e81820519f6bd79ac <437e50ef6290ac835d526d0e45f466a0aa69ba1b; version=30b4503378c976cf66201a1e81820519f6bd79ac <6e1f586ddec48d71016b81acf68ba9f49ca54db8; version=30b4503378c976cf66201a1e81820519f6bd79ac <b9cee506da2b7920b5ea02ccd8e78a907d0ee7aa; version=30b4503378c976cf66201a1e81820519f6bd79ac <d6870f3800dbb212ae8433183ee82f566d067c6c; version=30b4503378c976cf66201a1e81820519f6bd79ac <f011360ad234a07cb6fbcc720fff646a93a9f0d6; version=3.1

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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