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CVE Record

CVE-2023-53743: PCI: Free released resource after coalescing

In the Linux kernel, the following vulnerability has been resolved: PCI: Free released resource after coalescing release_resource() doesn't actually free the resource or resource list entry so free the resource list entry to avoid a leak.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel PCI resource-management bug that can leak memory when resources are released after coalescing. The source bundle does not provide a CVSS score, business-impact statement, or exploitation evidence. Treat it as a kernel maintenance risk unless your vendor assigns higher severity.

Executive priority

Handle through routine kernel patch governance unless local exposure is broad or a vendor rates it higher. There is no supplied evidence of active exploitation, but kernel defects can accumulate operational risk when left untracked.

Technical view

The issue is in Linux kernel PCI handling: release_resource() releases a resource but does not free the resource or resource-list entry. The fix frees the released resource-list entry after coalescing to avoid a leak. Public sources list upstream stable commit references but no exploit mechanics.

Likely exposure

Exposure appears limited to Linux systems running kernel versions identified as affected in the CVE record. The bundle does not identify affected distributions, hardware requirements, cloud platforms, or downstream package versions, so organizations should map their kernels through vendor advisories.

Exploitation context

CISA KEV status is false in the supplied bundle, and no cited source reports active exploitation or a public exploit. The available description indicates a resource leak, not privilege escalation or code execution, but operational impact is not fully documented.

Researcher notes

The source evidence is sparse: no CVSS, CWE, exploitability analysis, or distro mapping is provided. Research should focus on confirming affected kernel ranges, backport status, and whether the leak is reachable in practical PCI resource-management paths.

Mitigation direction

  • Check Linux vendor advisories for CVE-2023-53743 coverage.
  • Update affected Linux kernels to vendor-supported fixed releases.
  • Map upstream stable commits to downstream distribution packages.
  • Prioritize faster if vendor guidance rates this above maintenance severity.
  • Monitor KEV and vendor notices for exploitation-status changes.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and images.
  • Compare kernels against vendor CVE-2023-53743 advisories.
  • Confirm deployed packages include the referenced stable fixes.
  • Review kernel update status in golden images and CI base images.
  • Document exceptions where vendor backport status is unclear.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2023-53743 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
5Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux465c195e86f3d0ffd2e250c4b78a5a1f11cc1b0a, b9bd8e34ec97615db4b64e043adf0cd643b16ed4, e54223275ba1bc6f704a6bab015fcd2ae4f72572, e54223275ba1bc6f704a6bab015fcd2ae4f72572, 26277a4250207e630c9a11f4ead4ef6e8441bf1f, 6.1.40, 6.4.5, 5.15.181unaffected
LinuxLinux6.5, 0, 6.1.53, 6.4.16, 6.5.3, 6.6affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.