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Linux KernelOperating system · Linux

CVE-2023-52457

HIGH · 7.8 CVSS v3.1 Published 2024-02-23
Fix available
A fix is available. Upgrade to 5.4.268 / 5.10.209 or later.
See remediation →
80/100
Remediation priority · High
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: serial: 8250: omap: Don't skip resource freeing if pm_runtime_resume_and_get() failed Returning an error code from .remove() makes the driver core emit the little helpful error message: remove callback returned a non-zero value. This will be ignored. and then remove the device anyhow. So all resources that were not freed are leaked in this case. Skipping serial8250_unregister_port() has the potential to keep enough of the UART around to trigger a use-after-free. So replace the error return (and with it the little helpful error message) by a more useful error message and continue to cleanup.

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-416

Memory is used after it has been freed, so its contents — now potentially attacker-controlled — drive the program's behaviour. With careful heap grooming this becomes code execution. The fix requires disciplined ownership of memory and often a targeted rework of the object lifecycle.

General guidance for the use after free 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:>= 5.4.225, < 5.4.268>= 5.10.156, < 5.10.209>= 5.15.80, < 5.15.148>= 6.0.10, < 6.1.75>= 6.2, < 6.6.14>= 6.7, < 6.7.2

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
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 5.4.268 / 5.10.209 / 5.15.148 or later
Fixed in 5.4.2685.10.2095.15.148
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel 5.4.268, 5.10.209, 5.15.148, or 6.1.75 (or later stable release)

  1. 1. Identify the currently running Linux kernel version using `uname -r`
  2. 2. Check if the running kernel version falls within the affected range: >= 5.4.225 and < 5.4.268, >= 5.10.156 and < 5.10.209, >= 5.15.80 and < 5.15.148, or >= 6.0.10 and < 6.1.75
  3. 3. If affected, update the kernel package to the latest stable release for your distribution
  4. 4. For Ubuntu/Debian: `sudo apt update && sudo apt full-upgrade` then reboot
  5. 5. For RHEL/CentOS: `sudo yum update` then reboot
  6. 6. For Fedora: `sudo dnf upgrade` then reboot
  7. 7. Verify the new kernel version is running after reboot with `uname -r`
Caveat Kernel upgrades may require driver recompilation for out-of-tree modules; ensure critical hardware drivers are compatible

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 $3,200. 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-2023-52457 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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