CVE-2026-80716

Use-after-free via linked PCM stream unlink

Published Aug 28, 2026 · Updated Aug 28, 2026

Use-after-free in the Linux kernel ALSA PCM subsystem allows local users to leave a stack wait entry reachable through linked streams. snd_pcm_drain() conditionally skips finish_wait() after concurrent group unlinking, so runtime->sleep retains an entry after its stack frame is freed. Triggering requires linked PCM streams plus an unlink during a signal or timeout; a later wake traverses the freed frame, but no privilege escalation is established.

CVSS severityUnavailable
Unscored
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel ALSA PCM subsystem allows local users to leave a stack wait entry reachable through linked streams. snd_pcm_drain() conditionally skips finish_wait() after concurrent group unlinking, so runtime->sleep retains an entry after its stack frame is freed. Triggering requires linked PCM streams plus an unlink during a signal or timeout; a later wake traverses the freed frame, but no privilege escalation is established.

The record

CVE
CVE-2026-80716
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=5.1
  2. Affected versionversion=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <1c1b7e8e545ce65e40f65b55c432765e058ea98f
  3. Affected versionversion=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <2940cc3cf43c72126b74ee6376314c195382023a
  4. Affected versionversion=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <3035bb784cea3f338934f5042dd3f35225a51b2e
  5. Affected versionversion=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <c172e4c53321ee6429955295ea133bc3597a3ca9
  6. Affected versionversion=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <db09bc4ab19ce548a078240d2374792523953500
  7. Affected versionversion=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <e8315330e4ec09c0cac625515400e13d0ee22b81
  8. Affected versionversion=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <e8b784a3f4fba3ea9c4d05138ecfa784a069627f
  9. Affected versionversion=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <f495b6c4c8594122918552c9be2b51eb71647cd9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <1c1b7e8e545ce65e40f65b55c432765e058ea98f; version=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <2940cc3cf43c72126b74ee6376314c195382023a; version=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <3035bb784cea3f338934f5042dd3f35225a51b2e; version=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <c172e4c53321ee6429955295ea133bc3597a3ca9; version=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <db09bc4ab19ce548a078240d2374792523953500; version=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <e8315330e4ec09c0cac625515400e13d0ee22b81; version=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <e8b784a3f4fba3ea9c4d05138ecfa784a069627f; version=f57f3df03a8e6010e321fa0258d3e054713c3cb7 <f495b6c4c8594122918552c9be2b51eb71647cd9

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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