CVE-2024-50179

Local kernel crash via CephFS direct-read assertion

Published Nov 8, 2024 · Updated May 11, 2026

A faulty assertion in affected Linux kernel CephFS releases from 4.2 allows local users to crash the system through direct-I/O reads. The ceph_dirty_folio path executes BUG_ON(ci->i_wr_ref == 0) while a direct-I/O read dirties pages without holding the Fw capability reference. Triggering the assertion requires local access to a mounted CephFS filesystem and causes an availability-only kernel crash.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A faulty assertion in affected Linux kernel CephFS releases from 4.2 allows local users to crash the system through direct-I/O reads. The ceph_dirty_folio path executes BUG_ON(ci->i_wr_ref == 0) while a direct-I/O read dirties pages without holding the Fw capability reference. Triggering the assertion requires local access to a mounted CephFS filesystem and causes an availability-only kernel crash.

The record

CVE
CVE-2024-50179
Published
Nov 8, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 8, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.2
  2. Affected versionversion=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <11ab19d48ab877430eed0c7d83810970bbcbc4f6
  3. Affected versionversion=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <126b567a2ef65fc38a71d832bf1216c56816f231
  4. Affected versionversion=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <74b302ebad5b43ac17460fa58092d892a3cba6eb
  5. Affected versionversion=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <9d4f619153bab7fa59736462967821d6521a38cb
  6. Affected versionversion=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <c08dfb1b49492c09cf13838c71897493ea3b424e
  7. Affected versionversion=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <c26c5ec832dd9e9dcd0a0a892a485c99889b68f0
  8. Affected versionversion=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <ea98284fc4fb05f276737d2043b02b62be5a8dfb
  9. Affected versionversion=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <f55e003d261baa7c57d51ae5c8ec1f5c26a35c89
  10. Affected versionversion=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <f863bfd0a2c6c99011c62ea71ac04f8e78707da9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <11ab19d48ab877430eed0c7d83810970bbcbc4f6; version=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <126b567a2ef65fc38a71d832bf1216c56816f231; version=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <74b302ebad5b43ac17460fa58092d892a3cba6eb; version=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <9d4f619153bab7fa59736462967821d6521a38cb; version=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <c08dfb1b49492c09cf13838c71897493ea3b424e; version=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <c26c5ec832dd9e9dcd0a0a892a485c99889b68f0; version=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <ea98284fc4fb05f276737d2043b02b62be5a8dfb; version=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <f55e003d261baa7c57d51ae5c8ec1f5c26a35c89; version=5dda377cf0a6bd43f64a3c1efb670d7c668e7b29 <f863bfd0a2c6c99011c62ea71ac04f8e78707da9

Published CVSS scores

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

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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