CVE-2023-53867

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2025-12-24. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2025-205174 (ENISA EUVD) · GHSA-f688-j3hq-jm53 (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

ceph: fix potential use-after-free bug when trimming caps

When trimming the caps and just after the 'session->s_cap_lock' is released in ceph_iterate_session_caps() the cap maybe removed by another thread, and when using the stale cap memory in the callbacks it will trigger use-after-free crash.

We need to check the existence of the cap just after the 'ci->i_ceph_lock' being acquired. And do nothing if it's already removed.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
45th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

December 24, 2025

Last Modified

October 15, 2026

Advisory Details (4)

Auto-updated Nov 7, 2026
Patch available.
Web page

ceph: fix potential use-after-free bug when trimming caps - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ae6e935618d99cdba11eab4714092e7e5f13cf7e
Web page

ceph: fix potential use-after-free bug when trimming caps - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aaf67de78807c59c35bafb5003d4fb457c764800
Web page

ceph: fix potential use-after-free bug when trimming caps - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/448875a73e16ba7d81dec9274ce9d33a12d092fb
Web page

ceph: fix potential use-after-free bug when trimming caps - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2b2515b8095cf2149bef44383a99d5b5677f1831

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:4.18.0-553.el8_102024-05-22redhat
redhatkernel-0:5.14.0-362.8.1.el9_32023-11-07redhat
linuxKernel @ 6.1.28 (fixes >=2.6.34)—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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (498 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.27-1
  • every version up to 6.1.37-1: fixed in 6.1.37-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.3.7-1: fixed in 6.3.7-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.3.7-1: fixed in 6.3.7-1
—

Data Freshness Timeline

(refreshed 21× in last 7d / 98× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 357 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 257 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:30 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  2. 2026-11-12 15:33 UTCVendor advisory
  3. 2026-11-12 15:33 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-11-11 17:44 UTCEchelonGraph re-scored
  5. 2026-11-11 17:44 UTCVendor advisory
  6. 2026-11-11 17:44 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-11-11 16:34 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  8. 2026-11-10 19:54 UTCEchelonGraph re-scored
  9. 2026-11-10 19:54 UTCVendor advisory
  10. 2026-11-10 19:54 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-11-10 16:37 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  12. 2026-11-09 21:57 UTCEchelonGraph re-scored
  13. 2026-11-09 21:57 UTCVendor advisory
  14. 2026-11-09 21:57 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-11-09 16:30 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  16. 2026-11-09 00:08 UTCEchelonGraph re-scored
  17. 2026-11-09 00:08 UTCVendor advisory
  18. 2026-11-09 00:08 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-11-08 16:35 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  20. 2026-11-08 02:18 UTCEchelonGraph re-scored
  21. 2026-11-08 02:18 UTCVendor advisory
  22. 2026-11-08 02:18 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-11-07 16:35 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  24. 2026-11-07 04:26 UTCEchelonGraph re-scored
  25. 2026-11-07 04:26 UTCVendor advisory
Show 75 more
  1. 2026-11-07 04:26 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-11-06 16:31 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  3. 2026-11-06 06:34 UTCEchelonGraph re-scored
  4. 2026-11-06 06:34 UTCVendor advisory
  5. 2026-11-06 06:34 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-11-05 16:33 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  7. 2026-11-05 08:45 UTCEchelonGraph re-scored
  8. 2026-11-05 08:45 UTCVendor advisory
  9. 2026-11-05 08:45 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-11-04 19:25 UTCOSV refresh
  11. 2026-11-04 16:31 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  12. 2026-11-04 10:55 UTCEchelonGraph re-scored
  13. 2026-11-04 10:55 UTCVendor advisory
  14. 2026-11-04 10:55 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-11-03 16:41 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  16. 2026-11-03 13:06 UTCEchelonGraph re-scored
  17. 2026-11-03 13:06 UTCVendor advisory
  18. 2026-11-03 13:06 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-11-02 16:40 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  20. 2026-11-02 15:13 UTCVendor advisory
  21. 2026-11-02 15:12 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-11-01 17:24 UTCEchelonGraph re-scored
  23. 2026-11-01 17:24 UTCVendor advisory
  24. 2026-11-01 17:23 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  26. 2026-10-31 19:33 UTCEchelonGraph re-scored
  27. 2026-10-31 19:33 UTCVendor advisory
  28. 2026-10-31 19:33 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  29. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  30. 2026-10-30 21:44 UTCEchelonGraph re-scored
  31. 2026-10-30 21:44 UTCVendor advisory
  32. 2026-10-30 21:44 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  33. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  34. 2026-10-29 23:55 UTCEchelonGraph re-scored
  35. 2026-10-29 23:55 UTCVendor advisory
  36. 2026-10-29 23:55 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  37. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  38. 2026-10-29 02:06 UTCEchelonGraph re-scored
  39. 2026-10-29 02:06 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  40. 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  41. 2026-10-28 04:15 UTCEchelonGraph re-scored
  42. 2026-10-28 04:15 UTCVendor advisory
  43. 2026-10-28 04:15 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  44. 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  45. 2026-10-27 06:15 UTCEchelonGraph re-scored
  46. 2026-10-27 06:15 UTCVendor advisory
  47. 2026-10-27 06:15 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  49. 2026-10-26 04:20 UTCVendor advisory
  50. 2026-10-26 04:20 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-10-25 17:27 UTCEchelonGraph re-scored
  52. 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  53. 2026-10-25 06:29 UTCEchelonGraph re-scored
  54. 2026-10-25 06:29 UTCVendor advisory
  55. 2026-10-25 06:28 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  56. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  57. 2026-10-24 08:40 UTCEchelonGraph re-scored
  58. 2026-10-24 08:40 UTCVendor advisory
  59. 2026-10-24 08:40 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  61. 2026-10-23 10:51 UTCEchelonGraph re-scored
  62. 2026-10-23 10:51 UTCVendor advisory
  63. 2026-10-23 10:51 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  64. 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  65. 2026-10-22 12:47 UTCEchelonGraph re-scored
  66. 2026-10-22 12:47 UTCVendor advisory
  67. 2026-10-22 12:47 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  68. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  69. 2026-10-21 14:58 UTCEchelonGraph re-scored
  70. 2026-10-21 14:58 UTCVendor advisory
  71. 2026-10-21 14:58 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  72. 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  73. 2026-10-20 16:23 UTCVendor advisory
  74. 2026-10-20 16:22 UTCGHSA enrichmentGHSA-f688-j3hq-jm53 · GitHub severity CRITICAL · GitHub CVSS 9.8
  75. 2026-10-19 17:51 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2023-53867?
CVE-2023-53867 is a critical-severity vulnerability; its CVE record was published on December 24, 2025. In the Linux kernel, the following vulnerability has been resolved: ceph: fix potential use-after-free bug when trimming caps When trimming the caps and just after the 'session->s_cap_lock' is released in ceph_iterate_session_caps() the cap maybe removed by another thread, and when using the stale…
When was the CVE record for CVE-2023-53867 published?
The CVE record for CVE-2023-53867 was published on December 24, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 15, 2026; the record at its source may have been updated since.
Is CVE-2023-53867 actively exploited?
CVE-2023-53867 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-53867?
CVE-2023-53867 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2023-53867?
A fix for CVE-2023-53867 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-53867 are linked in the Vendor Advisories panel on this page.

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