Staging Environment: Content and features may be unstable or change without notice.
Advisory details: pypa / pywasm3/PYSEC-2025-186
Advisory ID pypa/pywasm3/PYSEC-2025-186
Aliases CVE-2025-6272
GHSA-rrmw-gv85-w824
PYSEC-2025-186
Summary A vulnerability has been found in wasm3 0.5.0 and classified as problematic. This vulnerability affects the function MarkSlotAllocated of the file source/m3_compile.c. The manipulation leads to out-of-bounds write. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.
Status Published
Exploitability 0.5
Weighted Severity 1.7
Risk 0.8
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
cvssv4 1.9 https://github.com/pypa/advisory-database/blob/main/vulns/pywasm3/PYSEC-2025-186.yaml
Reference id Reference type URL
https://github.com/advisories/GHSA-rrmw-gv85-w824
531 Bug https://github.com/wasm3/wasm3/issues/531
?ctiid.313276 Other https://vuldb.com/?ctiid.313276
?id.313276 Advisory https://vuldb.com/?id.313276
?submit.593008 Advisory https://vuldb.com/?submit.593008
wasm3_crash.txt Exploit https://github.com/user-attachments/files/19516600/wasm3_crash.txt
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Found at https://github.com/pypa/advisory-database/blob/main/vulns/pywasm3/PYSEC-2025-186.yaml
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-23T16:16:58Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2025/6xxx/CVE-2025-6272.json

Source Advisory: vulnrichment/CVE-2025-6272

View SSVC decision tree 
[{'Exploitation': 'poc'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]