CVE-2025-9001Public exploitNetwork attack vector

Remote client crash via unbounded stack allocation

Published Aug 15, 2025 · Updated Aug 15, 2025

Stack-based buffer overflow in Lemon OS nightly-2024-07-12 allows remote attackers to crash the steal HTTP client via a crafted response. HTTPGet parses an untrusted chunkSize from a chunked response and uses it directly as the length of a variable-length stack array, so a large value exhausts the process stack. Reachability requires a Lemon OS user to direct steal to an attacker-controlled HTTP server; demonstrated impact is a SIGSEGV process crash, and attempts to gain execution control failed.

CVSS severity7.5
High
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Lemon OS nightly-2024-07-12 allows remote attackers to crash the steal HTTP client via a crafted response. HTTPGet parses an untrusted chunkSize from a chunked response and uses it directly as the length of a variable-length stack array, so a large value exhausts the process stack. Reachability requires a Lemon OS user to direct steal to an attacker-controlled HTTP server; demonstrated impact is a SIGSEGV process crash, and attempts to gain execution control failed.

The record

CVE
CVE-2025-9001
Published
Aug 15, 2025
Updated
Aug 15, 2025
Vendor
Lemon OS Project
Product
Lemon OS
Classifications
CWE-121, CWE-787, CWE-119, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=nightly-2024-07-12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Lemon OS Project · Lemon OSversion=nightly-2024-07-12

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
5.0VulDBAV:N/AC:L/Au:N/C:N/I:N/A:P

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499.004Application or System Exploitation

Public exploit references

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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