CVE-2023-54308

Local kernel crash via stale ALSA card

Published Dec 30, 2025 · Updated Dec 30, 2025

Use-after-free in the Linux kernel ymfpci ALSA driver allows local users to crash the kernel after the driver is detached. Because probe still calls snd_card_new() after removal of the matching free path, detachment leaves ALSA device nodes and pointers registered after their backing module memory is freed. An administrator must first detach the driver; a local user with ordinary audio-device access can then open a stale node and trigger an Oops, memory exposure, or kernel-memory corruption.

CVSS severity6.8
Medium
EPSS probability0.15%
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 ymfpci ALSA driver allows local users to crash the kernel after the driver is detached. Because probe still calls snd_card_new() after removal of the matching free path, detachment leaves ALSA device nodes and pointers registered after their backing module memory is freed. An administrator must first detach the driver; a local user with ordinary audio-device access can then open a stale node and trigger an Oops, memory exposure, or kernel-memory corruption.

The record

CVE
CVE-2023-54308
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record 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=5.15
  2. Affected versionversion=c6e6bb5eab7457a938c0405d5ccf319d3ee735c1 <255a81a89501df77379b51a81c7a2e8e7c359bc6
  3. Affected versionversion=c6e6bb5eab7457a938c0405d5ccf319d3ee735c1 <95642872c466030240199ba796a40771c493ed0c
  4. Affected versionversion=c6e6bb5eab7457a938c0405d5ccf319d3ee735c1 <db7d7782677ff998c06997903d5400a0ba91cebb
  5. Affected versionversion=c6e6bb5eab7457a938c0405d5ccf319d3ee735c1 <f33fc1576757741479452255132d6e3aaf558ffe

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=c6e6bb5eab7457a938c0405d5ccf319d3ee735c1 <255a81a89501df77379b51a81c7a2e8e7c359bc6; version=c6e6bb5eab7457a938c0405d5ccf319d3ee735c1 <95642872c466030240199ba796a40771c493ed0c; version=c6e6bb5eab7457a938c0405d5ccf319d3ee735c1 <db7d7782677ff998c06997903d5400a0ba91cebb; version=c6e6bb5eab7457a938c0405d5ccf319d3ee735c1 <f33fc1576757741479452255132d6e3aaf558ffe

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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

T1499Endpoint Denial of Service

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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