CVE-2023-53607

Driver probe interruption via unaligned size assertion

Published Oct 4, 2025 · Updated Oct 4, 2025

Reachable assertion in the Linux kernel ALSA ymfpci driver allows local users to interrupt driver probing on affected Yamaha hardware. In snd_ymfpci_memalloc, the check compared the end of a page-aligned DMA buffer with an unaligned work_size value, so legitimate padding triggered snd_BUG_ON. The ymfpci module and compatible PCI audio hardware must be present; triggering the check produces a kernel warning and prevents successful device initialization, with no reported data exposure or modification.

CVSS severity5.5
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

Reachable assertion in the Linux kernel ALSA ymfpci driver allows local users to interrupt driver probing on affected Yamaha hardware. In snd_ymfpci_memalloc, the check compared the end of a page-aligned DMA buffer with an unaligned work_size value, so legitimate padding triggered snd_BUG_ON. The ymfpci module and compatible PCI audio hardware must be present; triggering the check produces a kernel warning and prevents successful device initialization, with no reported data exposure or modification.

The record

CVE
CVE-2023-53607
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-617
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 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=015af30d373d33548c9afcffbbaaf266459731de
  2. Affected versionversion=05243cf88f7fa5e9dd5659399bc9307ff3fb675f
  3. Affected versionversion=19241a56c5d6e74b32b1fbb1bd3ba7edef421f16
  4. Affected versionversion=4faf4bbc2d600a921052ff45b1b5914d583d9046 <96e34c88000febc83e41aa7db0b0a41676314818
  5. Affected versionversion=5.11
  6. Affected versionversion=5c1733e33c888a3cb7f576564d8ad543d5ad4a9e <32b9bd7cfc2e2d92d595386add4e111b232b351f
  7. Affected versionversion=5c1733e33c888a3cb7f576564d8ad543d5ad4a9e <6be2e7522eb529b41c16d459f33bbdbcddbf5c15
  8. Affected versionversion=5c1733e33c888a3cb7f576564d8ad543d5ad4a9e <81d2a7e93c8322ca6b858f6736d7fc3d034e6c23
  9. Affected versionversion=5c1733e33c888a3cb7f576564d8ad543d5ad4a9e <d0217b09910c081b6471181345ea5b24025edf51
  10. Affected versionversion=f52ac912c14c5bf426c0f9e0c6236dbcdf61664e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=015af30d373d33548c9afcffbbaaf266459731de; version=05243cf88f7fa5e9dd5659399bc9307ff3fb675f; version=19241a56c5d6e74b32b1fbb1bd3ba7edef421f16; version=4faf4bbc2d600a921052ff45b1b5914d583d9046 <96e34c88000febc83e41aa7db0b0a41676314818; version=5.11; version=5c1733e33c888a3cb7f576564d8ad543d5ad4a9e <32b9bd7cfc2e2d92d595386add4e111b232b351f; version=5c1733e33c888a3cb7f576564d8ad543d5ad4a9e <6be2e7522eb529b41c16d459f33bbdbcddbf5c15; version=5c1733e33c888a3cb7f576564d8ad543d5ad4a9e <81d2a7e93c8322ca6b858f6736d7fc3d034e6c23; version=5c1733e33c888a3cb7f576564d8ad543d5ad4a9e <d0217b09910c081b6471181345ea5b24025edf51; version=f52ac912c14c5bf426c0f9e0c6236dbcdf61664e

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion

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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