CVE-2023-53377

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-09-18. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

cifs: prevent use-after-free by freeing the cfile later

In smb2_compound_op we have a possible use-after-free which can cause hard to debug problems later on.

This was revealed during stress testing with KASAN enabled kernel. Fixing it by moving the cfile free call to a few lines below, after the usage.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

September 18, 2025

Last Modified

August 5, 2026

Advisory Details (4)

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

cifs: prevent use-after-free by freeing the cfile later - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/33f736187d08f6bc822117629f263b97d3df4165
generic

cifs: prevent use-after-free by freeing the cfile later - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d017880782cf71f8820ee4a2002843893176501d
generic

cifs: prevent use-after-free by freeing the cfile later - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b6353518ef8180816e863aa23b06456f395404d6
generic

cifs: prevent use-after-free by freeing the cfile later - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4fe07d55a5461e66a55fbefb57f85ff0facea32b

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 6.1.39—osv

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.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 43× 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 106 total refreshes for this CVE.

  1. 2026-08-07 16:25 UTCEPSS rescore
  2. 2026-08-06 13:45 UTCEPSS rescore
  3. 2026-08-05 19:15 UTCEPSS rescore
  4. 2026-08-05 19:15 UTCEPSS rescore
  5. 2026-08-05 10:19 UTCEG score recompute
  6. 2026-08-05 10:19 UTCGHSA enrichment
  7. 2026-08-04 10:36 UTCEPSS rescore
  8. 2026-08-04 09:31 UTCEG score recompute
  9. 2026-08-04 09:30 UTCGHSA enrichment
  10. 2026-08-03 10:34 UTCEPSS rescore
  11. 2026-08-02 02:25 UTCEPSS rescore
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  19. 2026-07-23 19:41 UTCOSV refresh
  20. 2026-07-23 14:16 UTCEPSS rescore
  21. 2026-07-23 02:29 UTCEG score recompute
  22. 2026-07-22 23:16 UTCEG score recompute
  23. 2026-07-22 14:07 UTCEPSS rescore
  24. 2026-07-22 14:07 UTCEPSS rescore
  25. 2026-07-21 15:23 UTCEPSS rescore
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  1. 2026-07-20 17:06 UTCEPSS rescore
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  6. 2026-07-18 10:03 UTCEPSS rescore
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  17. 2026-07-11 08:26 UTCEPSS rescore
  18. 2026-07-09 19:08 UTCEPSS rescore
  19. 2026-07-08 15:13 UTCEPSS rescore
  20. 2026-07-07 13:45 UTCEPSS rescore
  21. 2026-07-07 13:44 UTCEPSS rescore
  22. 2026-07-06 16:26 UTCEPSS rescore
  23. 2026-07-06 16:26 UTCEPSS rescore
  24. 2026-07-06 14:01 UTCOSV refresh
  25. 2026-07-06 02:22 UTCEPSS rescore
  26. 2026-07-06 02:22 UTCEPSS rescore
  27. 2026-07-04 06:29 UTCEPSS rescore
  28. 2026-07-01 15:05 UTCEPSS rescore
  29. 2026-06-30 23:21 UTCEPSS rescore
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  31. 2026-06-29 14:05 UTCEPSS rescore
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  40. 2026-06-23 21:31 UTCEPSS rescore
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  44. 2026-06-21 14:55 UTCEPSS rescore
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  46. 2026-06-21 01:58 UTCEPSS rescore
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  48. 2026-06-19 19:24 UTCEPSS rescore
  49. 2026-06-19 19:24 UTCEPSS rescore
  50. 2026-06-18 02:14 UTCOSV refresh
  51. 2026-06-17 17:51 UTCEPSS rescore
  52. 2026-06-16 17:51 UTCEPSS rescore
  53. 2026-06-16 17:51 UTCEPSS rescore
  54. 2026-06-15 17:47 UTCEPSS rescore
  55. 2026-06-14 23:16 UTCEPSS rescore
  56. 2026-06-13 22:59 UTCEPSS rescore
  57. 2026-06-13 22:59 UTCEPSS rescore
  58. 2026-06-12 23:11 UTCEPSS rescore
  59. 2026-06-11 13:59 UTCEPSS rescore
  60. 2026-06-10 22:17 UTCEPSS rescore
  61. 2026-06-10 13:21 UTCEPSS rescore
  62. 2026-06-08 14:16 UTCEPSS rescore
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  64. 2026-06-07 15:24 UTCEPSS rescore
  65. 2026-06-07 15:24 UTCEPSS rescore
  66. 2026-06-05 22:46 UTCEPSS rescore
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  68. 2026-06-05 06:09 UTCEPSS rescore
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  70. 2026-06-04 13:11 UTCEPSS rescore
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  72. 2026-06-02 20:12 UTCEPSS rescore
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  74. 2026-06-01 13:51 UTCEPSS rescore
  75. 2026-05-31 22:30 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2023-53377?
CVE-2023-53377 is a high vulnerability published on September 18, 2025. In the Linux kernel, the following vulnerability has been resolved: cifs: prevent use-after-free by freeing the cfile later In smb2compoundop we have a possible use-after-free which can cause hard to debug problems later on. This was revealed during stress testing with KASAN enabled kernel. Fixing…
When was CVE-2023-53377 disclosed?
CVE-2023-53377 was first published in the National Vulnerability Database on September 18, 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-2023-53377 actively exploited?
CVE-2023-53377 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 96.3% of all scored CVEs.
What is the CVSS score of CVE-2023-53377?
CVE-2023-53377 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-53377?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-53377, 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.

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