VulnerabilityPublished 16 Sep 2026Updated 30 Oct 2026

CVE-2026-89944: Linux kernel · ASoC: hdac_hda: Fix hlink refcount leak on component registration failure

Source GCVE Database

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Authoritative record:CVE-2026-89944· Low

Not known to be exploited · fixed in e8ea01a0457080b0cc7c69c430c0ab65d84dc377 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 19:20 UTC

Severity

Low

Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in e8ea01a0457080b0cc7c69c430c0ab65d84dc377, cb6b0b1a9d5a61ef841739d42c6211094e9c8e2c, 60b5824ae259ad15f7878e4e763ec31ba4db55f2 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-4wgj-g6wx-2p76

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 6bae5ea9498926440ffc883f3dbceb0adc65e492, < e8ea01a0457080b0cc7c69c430c0ab65d84dc377	Fixed in e8ea01a0457080b0cc7c69c430c0ab65d84dc377
LinuxLinux	Affected ≥ 6bae5ea9498926440ffc883f3dbceb0adc65e492, < cb6b0b1a9d5a61ef841739d42c6211094e9c8e2c	Fixed in cb6b0b1a9d5a61ef841739d42c6211094e9c8e2c
LinuxLinux	Affected ≥ 6bae5ea9498926440ffc883f3dbceb0adc65e492, < 60b5824ae259ad15f7878e4e763ec31ba4db55f2	Fixed in 60b5824ae259ad15f7878e4e763ec31ba4db55f2
LinuxLinux	Affected ≥ 6bae5ea9498926440ffc883f3dbceb0adc65e492, < 7eef9ae3b4ef782557526dd8ba0c206f028d8c2f	Fixed in 7eef9ae3b4ef782557526dd8ba0c206f028d8c2f
LinuxLinux	Affected ≥ 6bae5ea9498926440ffc883f3dbceb0adc65e492, < 6ad4892c4f5cb437a928a02f5b7d37d496aa9268	Fixed in 6ad4892c4f5cb437a928a02f5b7d37d496aa9268
LinuxLinux	Affected ≥ 6bae5ea9498926440ffc883f3dbceb0adc65e492, < 1c2625fbdeb17376f76c57b7669e6aa6500a7149	Fixed in 1c2625fbdeb17376f76c57b7669e6aa6500a7149

AI-suggested

A fix has been implemented in the Linux kernel to ensure proper reference count management. Users should update to the fixed kernel version once available. No additional mitigation is indicated.

Description

A reference count leak vulnerability in the Linux kernel's hdac_hda driver was fixed. The issue occurred when component registration failed during the probe process, causing the link reference count to not be properly decremented. This could lead to resource leaks in the kernel.

Impact

This vulnerability causes a reference count leak in the kernel's audio driver, which may lead to resource exhaustion or instability over time. There is no indication of direct security compromise or exploitation in the wild.

Summary

The Linux kernel's hdac_hda driver had a flaw where hdac_hda_dev_probe() obtained an HDA link reference via snd_hdac_ext_bus_link_get() before registering the ASoC component. If the component registration failed, the function returned without calling snd_hdac_ext_bus_link_put() to release the reference, causing a reference count leak. The fix ensures that snd_hdac_ext_bus_link_put() is always called after the registration attempt, balancing the reference count regardless of success or failure.

References

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