CVE-2026-74291

Local service interruption via unterminated topology names

Published Aug 15, 2026 · Updated Aug 15, 2026

Out-of-bounds read in Linux kernel ASoC topology parsing allows local users to interrupt service with a malformed topology blob. PCM, DAI, and stream-capability names in fixed-size UAPI arrays reach strlen, string duplication, lookup, and logging operations without bounded termination checks. Exploitation requires local low-privileged access and a path that submits an untrusted ASoC topology blob; no data modification is reported.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux kernel ASoC topology parsing allows local users to interrupt service with a malformed topology blob. PCM, DAI, and stream-capability names in fixed-size UAPI arrays reach strlen, string duplication, lookup, and logging operations without bounded termination checks. Exploitation requires local low-privileged access and a path that submits an untrusted ASoC topology blob; no data modification is reported.

The record

CVE
CVE-2026-74291
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=4.6
  2. Affected versionversion=64527e8a352968bda529f01df1c9dd5fe581ff04 <b7e44d1986d6671342c19b82192189ca5db5dab7
  3. Affected versionversion=64527e8a352968bda529f01df1c9dd5fe581ff04 <ba37b62ed0a443b8e23f53a7477e7f2537fd34c7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=64527e8a352968bda529f01df1c9dd5fe581ff04 <b7e44d1986d6671342c19b82192189ca5db5dab7; version=64527e8a352968bda529f01df1c9dd5fe581ff04 <ba37b62ed0a443b8e23f53a7477e7f2537fd34c7

Published CVSS scores

4.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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