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Linux KernelOperating system · Linux

CVE-2024-57893

MEDIUM · 6.3 CVSS v3.1 Published 2025-01-15
Fix available
A fix is available. Upgrade to 6.1.124 / 6.6.70 or later.
See remediation →
65/100
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: seq: oss: Fix races at processing SysEx messages OSS sequencer handles the SysEx messages split in 6 bytes packets, and ALSA sequencer OSS layer tries to combine those. It stores the data in the internal buffer and this access is racy as of now, which may lead to the out-of-bounds access. As a temporary band-aid fix, introduce a mutex for serializing the process of the SysEx message packets.

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
How this class of weakness works · CWE-362

Two operations that should be atomic can interleave, so an attacker who wins a narrow timing window reaches an inconsistent, exploitable state. These bugs are subtle and easy to miss in review. Fixing them properly means correct locking or atomic operations around the shared resource.

General guidance for the race condition class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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:< 6.1.124>= 6.2, < 6.6.70>= 6.7, < 6.12.9= 6.13

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
High
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/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 6.1.124 / 6.6.70 / 6.12.9 or later
Fixed in 6.1.1246.6.706.12.9
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel version 6.1.124 or higher (for 6.1.x branch), 6.6.70 or higher (for 6.2-6.6.x branch), 6.12.9 or higher (for 6.7-6.12.x branch), or latest stable (6.14+)

  1. Identify the current running kernel version using 'uname -r'
  2. Check your Linux distribution's kernel repository for available versions containing the fix (e.g., 6.1.124, 6.6.70, 6.12.9, or later)
  3. For Debian-based systems: Check https://security.debian.org for updated kernel packages
  4. For RHEL/CentOS systems: Check for errata updates or upgrade via 'yum update'
  5. For Ubuntu systems: Check for HWE kernel updates or use 'apt update && apt upgrade'
  6. After upgrading, reboot the system to load the fixed kernel
  7. Verify the fix is applied by checking the kernel version matches or exceeds: 6.1.124, 6.6.70, or 6.12.9 depending on your major version branch
Caveat Kernel upgrades may require rebuilding third-party kernel modules; ensure compatibility with new kernel version

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-2024-57893 in production — separate from our analysis above.

No notes yet

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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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