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Linux KernelOperating system · Linux

CVE-2023-53400

MEDIUM · 5.5 CVSS v3.1 Published 2025-09-18
Fix available
A fix is available. Upgrade to 4.14.316 / 4.19.284 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: Fix Oops by 9.1 surround channel names get_line_out_pfx() may trigger an Oops by overflowing the static array with more than 8 channels. This was reported for MacBookPro 12,1 with Cirrus codec. As a workaround, extend for the 9.1 channels and also fix the potential Oops by unifying the code paths accessing the same array with the proper size check.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:< 4.14.316>= 4.15, < 4.19.284>= 4.20, < 5.4.244>= 5.5, < 5.10.181>= 5.11, < 5.15.113>= 5.16, < 6.1.30>= 6.2, < 6.3.4= 6.4

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 4.14.316 / 4.19.284 / 5.4.244 or later
Fixed in 4.14.3164.19.2845.4.244
Vendor patch git.kernel.org →
Recommended fix High confidence

5.10.181 (or later stable kernel; alternatively 4.14.316, 4.19.284, or 5.4.244 depending on which branch is in use)

  1. Identify the currently running kernel version using `uname -r`
  2. Check if the running kernel version is affected: it is vulnerable if < 4.14.316, or >= 4.15 and < 4.19.284, or >= 4.20 and < 5.4.244, or >= 5.5 and < 5.10.181
  3. For affected kernels, upgrade to a patched version: for 4.14.x line upgrade to >= 4.14.316, for 4.19.x line upgrade to >= 4.19.284, for 5.4.x line upgrade to >= 5.4.244, for 5.10.x line upgrade to >= 5.10.181, or use the latest stable kernel from https://kernel.org/
  4. After kernel upgrade, reboot the system to load the fixed kernel
  5. Verify the fix is applied by checking the kernel version and confirming no Oops occurs when using 9.1 surround sound configurations
Caveat Kernel upgrades may introduce regressions in drivers or features; test in staging environment before production deployment

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-53400 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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