A heap overflow in the ifsbreakup() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a… (CVE-2026-38754)
A heap overflow vulnerability exists in the ifsbreakup() function within shell/ash.c of Busybox version 1.38.0. This flaw allows an attacker to cause a Denial of Service (DoS) by supplying crafted input to the affected function. The vulnerability is identified as CWE-122 (Heap-based Buffer Overflow) and CWE-125 (Out-of-bounds Read). No patch or remediation information is currently provided.
AI Analysis
Technical Summary
Busybox v1.38.0 contains a heap overflow vulnerability in the ifsbreakup() function located in shell/ash.c. This vulnerability can be triggered by an attacker providing specially crafted input, leading to a Denial of Service condition. The issue relates to improper handling of memory buffers, classified under CWE-122 and CWE-125. The CVSS 3.1 base score vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and an impact limited to availability (DoS) with no confidentiality or integrity impact.
Potential Impact
Successful exploitation results in a Denial of Service (DoS) condition, impacting the availability of the Busybox shell component. There is no indication of confidentiality or integrity compromise. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted input with the affected Busybox version. Monitor vendor channels for updates.
A heap overflow in the ifsbreakup() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a… (CVE-2026-38754)
Description
A heap overflow vulnerability exists in the ifsbreakup() function within shell/ash.c of Busybox version 1.38.0. This flaw allows an attacker to cause a Denial of Service (DoS) by supplying crafted input to the affected function. The vulnerability is identified as CWE-122 (Heap-based Buffer Overflow) and CWE-125 (Out-of-bounds Read). No patch or remediation information is currently provided.
CVSS v3.1
Score 7.5high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Busybox v1.38.0 contains a heap overflow vulnerability in the ifsbreakup() function located in shell/ash.c. This vulnerability can be triggered by an attacker providing specially crafted input, leading to a Denial of Service condition. The issue relates to improper handling of memory buffers, classified under CWE-122 and CWE-125. The CVSS 3.1 base score vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and an impact limited to availability (DoS) with no confidentiality or integrity impact.
Potential Impact
Successful exploitation results in a Denial of Service (DoS) condition, impacting the availability of the Busybox shell component. There is no indication of confidentiality or integrity compromise. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted input with the affected Busybox version. Monitor vendor channels for updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-jj7c-h3wm-vjfw
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-38754"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a5e79eb2a4a8d59899bb3da
Added to database: 07/20/2026, 19:41:31 UTC
Last enriched: 07/20/2026, 19:46:33 UTC
Last updated: 07/31/2026, 19:24:50 UTC
Views: 12
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.