CVE-2024-53239

Local privilege escalation via premature 6fire teardown

Published Dec 27, 2024 · Updated Aug 5, 2026

Use-after-free in the ALSA 6fire driver in Linux allows local users to execute code in kernel context during USB device teardown. The USB disconnect callback invokes usb6fire_chip_destroy while snd_card_free_when_closed leaves the card live, freeing runtime objects that later close paths dereference. An unprivileged local account needs access to an ALSA sound device and a 6fire card teardown; reclaimed objects enable kernel-memory reads, writes, indirect calls, or a kernel panic.

CVSS severity7.8
High
EPSS probability0.29%
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 ALSA 6fire driver in Linux allows local users to execute code in kernel context during USB device teardown. The USB disconnect callback invokes usb6fire_chip_destroy while snd_card_free_when_closed leaves the card live, freeing runtime objects that later close paths dereference. An unprivileged local account needs access to an ALSA sound device and a 6fire card teardown; reclaimed objects enable kernel-memory reads, writes, indirect calls, or a kernel panic.

The record

CVE
CVE-2024-53239
Published
Dec 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=2.6.39
  2. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <0df7f4b5cc10f5adf98be0845372e9eef7bb5b09
  3. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <273eec23467dfbfbd0e4c10302579ba441fb1e13
  4. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <57860a80f03f9dc69a34a5c37b0941ad032a0a8c
  5. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <74357d0b5cd3ef544752bc9f21cbeee4902fae6c
  6. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <a0810c3d6dd2d29a9b92604d682eacd2902ce947
  7. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <b754e831a94f82f2593af806741392903f359168
  8. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <b889a7d68d7e76b8795b754a75c91a2d561d5e8c
  9. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <ea8cc56db659cf0ae57073e32a4735ead7bd7ee3
  10. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <f2d06d4e129e2508e356136f99bb20a332ff1a00

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.39; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <0df7f4b5cc10f5adf98be0845372e9eef7bb5b09; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <273eec23467dfbfbd0e4c10302579ba441fb1e13; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <57860a80f03f9dc69a34a5c37b0941ad032a0a8c; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <74357d0b5cd3ef544752bc9f21cbeee4902fae6c; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <a0810c3d6dd2d29a9b92604d682eacd2902ce947; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <b754e831a94f82f2593af806741392903f359168; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <b889a7d68d7e76b8795b754a75c91a2d561d5e8c; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <ea8cc56db659cf0ae57073e32a4735ead7bd7ee3; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <f2d06d4e129e2508e356136f99bb20a332ff1a00

Published CVSS scores

7.8Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/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.

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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-416Use After Free
T1068Exploitation for Privilege Escalation

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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