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Linux EUVDEUVD-2026-93299

| CVE-2026-98314
2026-10-06 Linux GHSA-f958-2rwj-98rc
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Monitor Track and reassess. Why: No CVSS yet + weak signal (CWE or non-zero EPSS).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisCVE.org

In the Linux kernel, the following vulnerability has been resolved:

ALSA: pcm: set timer->private_data before registering the PCM timer

snd_pcm_timer_init() calls snd_device_register() to link the new struct snd_timer into the global timer list while it still carries hw.c_resolution = snd_pcm_timer_resolution (and hw.start/hw.stop), and only afterwards sets timer->private_data = substream.

Once the timer is on the list under register_mutex, a concurrent reader can already reach it through the same mutex and invoke these callbacks. /proc/asound/timers does this via c_resolution(), and snd_timer_open()+snd_timer_start() reach start()/stop() the same way. All three dereference timer->private_data, which for this brief window is NULL, giving a NULL-pointer dereference:

substream = timer->private_data; return substream->runtime ? ... // substream is NULL

Move the private_data/private_free assignment before snd_device_register() so the timer is never visible on the list without its private_data set. On the snd_device_register() failure path, private_free() (snd_pcm_timer_free()) can now run, but it only does substream->timer = NULL, which is already NULL at that point since substream->timer is set to the new timer just once, after a successful registration -- so the failure path stays safe.

Affected VersionsENISA

Linux patch: 6.12.112
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d63f5a9f8121fb43c798056d7dd34c58f47185d7
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <27f167e117eca310661fbcbacb352ea08face067
Linux patch: 5.10.271
Linux patch: 7.3-rc4
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e1eee8f16628f8b6bcae0a366fd6a2dd65e71edd
Linux patch: 6.18.54
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1e713f9bb2ac583521f06b0eb4e22440b1e3d078
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <555d168bd98daa46daccc68c908201388c834293
Linux patch: 5.15.222
Linux patch: 7.2.8
Linux patch: 6.6.158
Linux 2.6.12
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <686c7a6af1eea8d2a919303e4c6bbec3de79dbdc
Linux patch: 0
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0b349249d572633d7c8cdeb917623d1676a2b7c3
Linux patch: 6.1.189
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8c869d5cf5affb20994bdbb60e7d46d65c91b55f

Affected Packages

euvd linux no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Lifecycle Timeline

2
Patch available
Oct 06, 2026 - 10:02 EUVD
CVE Published
Oct 06, 2026 - 08:46 cve.org
UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score
0.2%
Top 93% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity Not scored yet
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
No CVSS yet + weak signal (CWE or non-zero EPSS)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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