CVE-2024-27032

Kernel panic or deadlock via failed block reservation

Published May 1, 2024 · Updated May 23, 2026

Denial of service in Linux f2fs recovery allows local users to crash or hang the kernel through induced block-allocation failure. When f2fs_reserve_new_block() returns -ENOSPC under FAULT_BLOCK injection, recovery reaches a BUG_ON or retries block reservation without a bound. The path requires an f2fs recovery operation with FAULT_BLOCK enabled; the consequence is a kernel panic or an indefinite recovery loop.

CVSS severity6.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux f2fs recovery allows local users to crash or hang the kernel through induced block-allocation failure. When f2fs_reserve_new_block() returns -ENOSPC under FAULT_BLOCK injection, recovery reaches a BUG_ON or retries block reservation without a bound. The path requires an f2fs recovery operation with FAULT_BLOCK enabled; the consequence is a kernel panic or an indefinite recovery loop.

The record

CVE
CVE-2024-27032
Published
May 1, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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?

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

  1. Affected versionversion=2a7b12d4705bc308cf18eae2b69ec8db34881cc3 <8844b2f8a3f0c428b74672f9726f9950b1a7764c
  2. Affected versionversion=4.19.307 <4.20
  3. Affected versionversion=5.10.210 <5.11
  4. Affected versionversion=5.15.149 <5.16
  5. Affected versionversion=5.4.269 <5.5
  6. Affected versionversion=6.1.77 <6.1.83
  7. Affected versionversion=6.6.16 <6.6.23
  8. Affected versionversion=6.7.4 <6.7.11
  9. Affected versionversion=6.8
  10. Affected versionversion=80c69f576ff39d6ae8a6e2107da3dc03b533759c
  11. Affected versionversion=956fa1ddc132e028f3b7d4cf17e6bfc8cb36c7fd <21ec68234826b1b54ab980a8df6e33c74cfbee58
  12. Affected versionversion=956fa1ddc132e028f3b7d4cf17e6bfc8cb36c7fd <f26091a981318b5b7451d61f99bc073a6af8db67
  13. Affected versionversion=9fceaf8182d453639cddb7f4a6877a1e1564de39
  14. Affected versionversion=b1020a546779139eec5d930e15ce534c1101b89c <fe4de493572a4263554903bf9c3afc5c196e15f0
  15. Affected versionversion=b29cc6e29b5e6037e1bcd2b2ac67b7d89acd194c <d034810d02a5af8eb74debe29877dcaf5f00fdd1
  16. Affected versionversion=b4fb0807a1d60f8642a5fd62bd659cd6052eaf97
  17. Affected versionversion=bc1fb291f36dd1d9d667241d9fe30b835dbb8ee8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2a7b12d4705bc308cf18eae2b69ec8db34881cc3 <8844b2f8a3f0c428b74672f9726f9950b1a7764c; version=4.19.307 <4.20; version=5.10.210 <5.11; version=5.15.149 <5.16; version=5.4.269 <5.5; version=6.1.77 <6.1.83; version=6.6.16 <6.6.23; version=6.7.4 <6.7.11; version=6.8; version=80c69f576ff39d6ae8a6e2107da3dc03b533759c; version=956fa1ddc132e028f3b7d4cf17e6bfc8cb36c7fd <21ec68234826b1b54ab980a8df6e33c74cfbee58; version=956fa1ddc132e028f3b7d4cf17e6bfc8cb36c7fd <f26091a981318b5b7451d61f99bc073a6af8db67; version=9fceaf8182d453639cddb7f4a6877a1e1564de39; version=b1020a546779139eec5d930e15ce534c1101b89c <fe4de493572a4263554903bf9c3afc5c196e15f0; version=b29cc6e29b5e6037e1bcd2b2ac67b7d89acd194c <d034810d02a5af8eb74debe29877dcaf5f00fdd1; version=b4fb0807a1d60f8642a5fd62bd659cd6052eaf97; version=bc1fb291f36dd1d9d667241d9fe30b835dbb8ee8

Published CVSS scores

6.3CISA-ADPCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/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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