CVE-2023-53473

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-10-01. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

ext4: improve error handling from ext4_dirhash()

The ext4_dirhash() will *almost* never fail, especially when the hash tree feature was first introduced. However, with the addition of support of encrypted, casefolded file names, that function can most certainly fail today.

So make sure the callers of ext4_dirhash() properly check for failures, and reflect the errors back up to their callers.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

October 1, 2025

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

ext4: improve error handling from ext4_dirhash() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4b3cb1d108bfc2aebb0d7c8a52261a53cf7f5786
generic

ext4: improve error handling from ext4_dirhash() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c1fae027da61fe8e7eb99f7244297e81bc0f1e43
generic

ext4: improve error handling from ext4_dirhash() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/70d579aefa652a06af97e013e3fbbabbe5a43553
generic

ext4: improve error handling from ext4_dirhash() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f68876aeef96ef8b708ab10b9cb47ce0a5adb424
generic

ext4: improve error handling from ext4_dirhash() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b2531936118deb3f479c4fa1bcd787b74b8faa6a

Vendor Advisories for CVE-2023-53473(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-0:5.14.0-427.13.1.el9_42024-04-30redhat
linuxKernel @ 5.15.112osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Data Freshness Timeline

(refreshed 17× in last 7d / 51× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 115 total refreshes for this CVE.

  1. 2026-08-05 19:15 UTCEPSS rescore
  2. 2026-08-05 19:15 UTCEPSS rescore
  3. 2026-08-05 10:19 UTCEG score recompute
  4. 2026-08-05 10:19 UTCVendor advisory
  5. 2026-08-05 10:19 UTCGHSA enrichment
  6. 2026-08-04 10:58 UTCEG score recompute
  7. 2026-08-04 10:58 UTCVendor advisory
  8. 2026-08-04 10:57 UTCGHSA enrichment
  9. 2026-08-04 10:36 UTCEPSS rescore
  10. 2026-08-04 09:30 UTCEG score recompute
  11. 2026-08-04 09:30 UTCVendor advisory
  12. 2026-08-04 09:30 UTCGHSA enrichment
  13. 2026-08-03 10:34 UTCEPSS rescore
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  24. 2026-07-23 18:41 UTCOSV refresh
  25. 2026-07-23 14:16 UTCEPSS rescore
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  1. 2026-07-23 02:29 UTCEG score recompute
  2. 2026-07-22 23:16 UTCEG score recompute
  3. 2026-07-22 14:07 UTCEPSS rescore
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  5. 2026-07-21 15:23 UTCEPSS rescore
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  23. 2026-07-09 19:08 UTCEPSS rescore
  24. 2026-07-08 15:13 UTCEPSS rescore
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  27. 2026-07-06 16:26 UTCEPSS rescore
  28. 2026-07-06 16:26 UTCEPSS rescore
  29. 2026-07-06 13:11 UTCOSV refresh
  30. 2026-07-06 02:22 UTCEPSS rescore
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  32. 2026-07-05 02:29 UTCEPSS rescore
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  54. 2026-06-19 19:24 UTCEPSS rescore
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  56. 2026-06-18 17:51 UTCEPSS rescore
  57. 2026-06-18 01:35 UTCOSV refresh
  58. 2026-06-17 17:51 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2023-53473?
CVE-2023-53473 is a high vulnerability published on October 1, 2025. In the Linux kernel, the following vulnerability has been resolved: ext4: improve error handling from ext4_dirhash() The ext4_dirhash() will almost never fail, especially when the hash tree feature was first introduced. However, with the addition of support of encrypted, casefolded file names, that…
When was CVE-2023-53473 disclosed?
CVE-2023-53473 was first published in the National Vulnerability Database on October 1, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-53473 actively exploited?
CVE-2023-53473 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 94.9% of all scored CVEs.
What is the CVSS score of CVE-2023-53473?
CVE-2023-53473 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-53473?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-53473, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2023-53473

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