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CVE-2026-38752· NVD / CVE Program· CNA mitre

A stack overflow in the evaluate() function (editors/awk.c) of BusyBox commit 371fe9 allows attackers to cause a Denial of Service (DoS) via

Noroxi assessment

Priority: Monitor (action score 11/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.20% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: azl3 busybox 1.36.1-24 on Azure Linux 3.0 1.36.1-25; azl3 busybox 1.36.1-26 on Azure Linux 3.0 1.36.1-26.

Low priority for now. Upgrade to azl3 busybox 1.36.1-24 on Azure Linux 3.0 1.36.1-25; azl3 busybox 1.36.1-26 on Azure Linux 3.0 1.36.1-26 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A stack overflow in the evaluate() function (editors/awk.c) of BusyBox commit 371fe9 allows attackers to cause a Denial of Service (DoS) via supplying a crafted AWK script.

LowCVSS 2.9 · v3.1—No exploit Fix available
Published
Jul 15, 2026
Updated
Jul 20, 2026
EPSS
0.2% · 10th percentile

Report tools

JSON

Action score

11

Monitor

Low priority for now.

CVSS
11 / 40 · 2.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · mitre
2.9
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-38752

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
busyboxbusybox

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • busybox busybox2024-07-13

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mitre). Independent of NVD's CPE analysis and usually ahead of it.

  • BusyBox BusyBox

    • 1.00 and later · up to and including 1.38.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12busyboxall versions—
Debian:14busyboxbefore 1:1.38.0-31:1.38.0-3
openSUSE:Leap 16.0busyboxbefore 1.37.0-160000.7.11.37.0-160000.7.1
openSUSE:Tumbleweedbusyboxbefore 1.38.0-2.11.38.0-2.1
Red Hat:hummingbird:1busyboxbefore 0:1.37.0-8.2.hum10:1.37.0-8.2.hum1
Red Hat:hummingbird:1busybox-petitbootbefore 0:1.37.0-8.2.hum10:1.37.0-8.2.hum1
Red Hat:hummingbird:1busybox-sharedbefore 0:1.37.0-8.2.hum10:1.37.0-8.2.hum1
SUSE:Linux Enterprise Module for Basesystem 15 SP7busyboxbefore 1.37.0-150700.18.21.11.37.0-150700.18.21.1
SUSE:Linux Enterprise Server 16.0busyboxbefore 1.37.0-160000.7.11.37.0-160000.7.1
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5busyboxbefore 1.35.0-10.9.11.35.0-10.9.1
SUSE:Linux Micro 6.0busyboxbefore 1.36.1-5.11.36.1-5.1

Same product

busybox: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-1000517BusyBox project BusyBox wget version prior to commit 8e2174e9bd836e53c8b9c6e00d1bc6e2a718686e contains a Buffer Overflow vulnerability in Bu
    49Plan
  • CVE-2016-2148Heap-based buffer overflow in the DHCP client (udhcpc) in BusyBox before 1.25.0 allows remote attackers to have unspecified impact via vecto
    47Plan
  • CVE-2022-48174There is a stack overflow vulnerability in ash.c:6030 in busybox before 1.35.
    40Plan
  • CVE-2021-42377An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafte
    40Plan
  • CVE-2017-16544In the add_match function in libbb/lineedit.c in BusyBox through 1.27.2, the tab autocomplete feature of the shell, used to get a list of fi
    37Monitor
  • CVE-2022-28391BusyBox through 1.35.0 allows remote attackers to execute arbitrary code if netstat is used to print a DNS PTR record's value to a VT compat
    36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 busybox 1.36.1-24 on Azure Linux 3.01.36.1-25 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 busybox 1.36.1-26 on Azure Linux 3.01.36.1-26 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:busybox1:1.38.0-3 · Debian:14Package registry (OSV)
opensuse:busybox1.38.0-2.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:busybox0:1.37.0-8.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:busybox-petitboot0:1.37.0-8.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:busybox-shared0:1.37.0-8.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
suse:busybox1.36.1-5.1 · SUSE:Linux Micro 6.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-387550 days apartA heap overflow in the evalcommand() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via suppl
    11Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-674 · Uncontrolled Recursion

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records