CVE-2022-48257

Local service interruption via predictable temporary log paths

Published Jan 13, 2023 · Updated Nov 4, 2025

Temporary-file race in Eternal Terminal 6.2.1 allows local users to prevent etserver or etclient startup via precreated log paths. etserver and etclient derive /tmp log names from timestamps with only minute or second granularity, then open those attacker-predictable paths. Exploitation requires local access and precise precreation; common Linux symlink protections limit overwrite effects, but path collisions can still stop the processes from starting.

CVSS severity5.3
Medium
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Temporary-file race in Eternal Terminal 6.2.1 allows local users to prevent etserver or etclient startup via precreated log paths. etserver and etclient derive /tmp log names from timestamps with only minute or second granularity, then open those attacker-predictable paths. Exploitation requires local access and precise precreation; common Linux symlink protections limit overwrite effects, but path collisions can still stop the processes from starting.

The record

CVE
CVE-2022-48257
Published
Jan 13, 2023
Updated
Nov 4, 2025
Vendor
Fedora Project
Product
Fedora Linux
Classifications
CWE-732, T1489
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 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?

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

  1. Affected versionversion=38
  2. Affected versionversion=39
  3. Affected versionversion=40

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Fedora Project · Fedora Linuxversion=38; version=39; version=40
Eternal Terminal Project · Eternal Terminalversion=6.2.1

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1489Service Stop

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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