CVE-2023-53867

CRITICAL

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 re...

Affects 1 product across 3 vendors.

CVSS 3.19.8
EPSS0.5%
Percentile44th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
◆ AI Analysis — automated analysis, not human-reviewed

A use-after-free vulnerability exists in the Linux kernel's Ceph subsystem when trimming caps, which could lead to a crash due to the use of stale memory.

BSID: BS-2025-GLOBAL-032720-I • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: MEDIUM

Is this CVE in your environment?

BreachSpider monitors your ICS/OT environment for vulnerabilities like this one. No agents or network access required. Free to start.

Check My Environment →
Frequently Asked Questions
What is CVE-2023-53867?
A use-after-free vulnerability exists in the Linux kernel's Ceph subsystem when trimming caps, which could lead to a crash due to the use of stale memory.
What is the CVSS score for CVE-2023-53867?
CVE-2023-53867 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 0.5%.
Is CVE-2023-53867 actively exploited?
No confirmed active exploitation of CVE-2023-53867 as of 2026-10-17.
How do I remediate CVE-2023-53867?
Priority: MEDIUM.
What systems are affected by CVE-2023-53867?
CVE-2023-53867 affects Ceph; Kernel; Linux Linux.
Vulnerability Details
CVE IDCVE-2023-53867
BSIDBS-2025-GLOBAL-032720-I BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2025-12-24
Last Modified2026-10-15
ICS Relevance0%
SourceNVD
Official Description

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.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

The vulnerability occurs when the 'session->s_cap_lock' is released in ceph_iterate_session_caps(), allowing another thread to remove the cap. Subsequent use of this cap in callbacks results in a use-after-free condition.

Exploitation Likelihood: MEDIUM

Affected Products
VendorProductAffected Versions
Ceph — —
Kernel — —
Linux Linux 2.6.34
Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 296 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash01415a376866074cc104267819bdf18f69b7b01eeb367419a1782126759513d5cbee6fa38a05848a29e284d248d7345cddf2dac6627f8e31e19160cab3afc5c8
Related CVEs affecting Ceph
CVE-2025-68285 9.8 In the Linux kernel, the following vulnerability has been resolved: libceph:... CVE-2025-40362 8.8 In the Linux kernel, the following vulnerability has been resolved: ceph: fi... CVE-2020-1716 8.8 A flaw was found in the ceph-ansible playbook where it contained hardcoded pa... CVE-2018-10861 8.1 A flaw was found in the way ceph mon handles user requests. Any authenticated... CVE-2024-48916 8.1 Ceph is a distributed object, block, and file storage platform. In versions 1...
View all Ceph CVEs →

Critical Severity - Know Your Exposure

A CVSS 9.8 vulnerability in your ICS environment cannot wait. BreachSpider maps critical CVEs to your specific assets and tells you what to fix first.

Create a free account →