CVE-2026-49417Public exploit

Local privilege escalation via stale audio mapping

Published Jun 27, 2026 · Updated Jun 27, 2026

Use-after-free in FreeBSD 14.3 before p15, 14.4 before p6, and 15.0 before p10 allows local users to read and write kernel memory. The dsp_mmap_single() path leaves a VM mapping valid after device closure frees its audio-channel buffer, so reused kernel memory remains exposed through the stale mapping. World-accessible /dev/dsp nodes and an installed audio device provide the required access, enabling full kernel compromise or a kernel crash.

CVSS severity7.0
High
EPSS probability0.13%
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 FreeBSD 14.3 before p15, 14.4 before p6, and 15.0 before p10 allows local users to read and write kernel memory. The dsp_mmap_single() path leaves a VM mapping valid after device closure frees its audio-channel buffer, so reused kernel memory remains exposed through the stale mapping. World-accessible /dev/dsp nodes and an installed audio device provide the required access, enabling full kernel compromise or a kernel crash.

The record

CVE
CVE-2026-49417
Published
Jun 27, 2026
Updated
Jun 27, 2026
Vendor
The FreeBSD Project
Product
FreeBSD
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 27, 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=14.3-RELEASE <p15
  2. Affected versionversion=14.4-RELEASE <p6
  3. Affected versionversion=15.0-RELEASE <p10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The FreeBSD Project · FreeBSDversion=14.3-RELEASE <p15; version=14.4-RELEASE <p6; version=15.0-RELEASE <p10

Published CVSS scores

7.0CISA-ADPCVSS:3.1/AV:L/AC:H/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.

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 exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

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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