CVE-2022-49109

Service interruption via leaked CephFS inode references

Published Feb 26, 2025 · Updated Aug 12, 2026

Inode reference leakage in Linux allows local users to interrupt CephFS clients by reaching ceph_get_snapdir() error paths. The function returns ENOTDIR after ceph_get_inode() acquires a reference, without calling iput() or discard_new_inode() on two error exits. The path requires an affected kernel acting as a CephFS client, and repeated triggers retain inode references until service is interrupted.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Inode reference leakage in Linux allows local users to interrupt CephFS clients by reaching ceph_get_snapdir() error paths. The function returns ENOTDIR after ceph_get_inode() acquires a reference, without calling iput() or discard_new_inode() on two error exits. The path requires an affected kernel acting as a CephFS client, and repeated triggers retain inode references until service is interrupted.

The record

CVE
CVE-2022-49109
Published
Feb 26, 2025
Updated
Aug 12, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=3e10a15ffc8d77f05e655d14fd48c0b790dede35 <322794d3355c33adcc4feace0045d85a8e4ed813
  2. Affected versionversion=3e10a15ffc8d77f05e655d14fd48c0b790dede35 <3ae7163598c611a8892698e0c056fe794e52b44b
  3. Affected versionversion=3e10a15ffc8d77f05e655d14fd48c0b790dede35 <9cd21981dedfb4fe9f344529e4be35727cb10940
  4. Affected versionversion=3e10a15ffc8d77f05e655d14fd48c0b790dede35 <b2d9bb3f06abddefdfa740b0a604575b6797e1bf
  5. Affected versionversion=5.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3e10a15ffc8d77f05e655d14fd48c0b790dede35 <322794d3355c33adcc4feace0045d85a8e4ed813; version=3e10a15ffc8d77f05e655d14fd48c0b790dede35 <3ae7163598c611a8892698e0c056fe794e52b44b; version=3e10a15ffc8d77f05e655d14fd48c0b790dede35 <9cd21981dedfb4fe9f344529e4be35727cb10940; version=3e10a15ffc8d77f05e655d14fd48c0b790dede35 <b2d9bb3f06abddefdfa740b0a604575b6797e1bf; version=5.13

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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