CVE-2024-1048

Local denial of service via orphaned temporary files

Published Feb 6, 2024 · Updated Nov 20, 2025

Temporary-file cleanup failure in Red Hat Enterprise Linux 8 and 9 allows local users to exhaust /boot filesystem inodes. The SUID grub2-set-bootflag utility writes new grubenv content to a temporary file but does not remove it when termination occurs before rename. A low-privilege local account can repeatedly trigger reliable SIGXFSZ termination until the affected filesystem cannot create new files.

CVSS severity3.3
Low
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Temporary-file cleanup failure in Red Hat Enterprise Linux 8 and 9 allows local users to exhaust /boot filesystem inodes. The SUID grub2-set-bootflag utility writes new grubenv content to a temporary file but does not remove it when termination occurs before rename. A low-privilege local account can repeatedly trigger reliable SIGXFSZ termination until the affected filesystem cannot create new files.

The record

CVE
CVE-2024-1048
Published
Feb 6, 2024
Updated
Nov 20, 2025
Vendor
Red Hat
Product
Red Hat Enterprise Linux 8
Classifications
CWE-459, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Red Hat · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.

Published CVSS scores

3.3Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-459Incomplete Cleanup
T1499.001OS Exhaustion Flood

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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