CVE-2026-13573

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.17% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 6.3% of scored records. A rank, not a probability.

NVD base score

1.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS 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

NVD analysis status

Deferred. NVD last modified this record on 2026-10-25.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-06-29 14:00Z4 MO AGO

Last updated

2026-07-07 14:32Z3 MO AGO

Reserved

2026-06-28

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 4.8)

CNA CVSS 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

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-121Stack-based Buffer OverflowVariant
• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base

Data version

5.2

Document digest

431d62e39a4d5435758e86cb9536b9c61b38cc9a94416e6bbcaee306c597e95d

• vuldb.comVDB-374581 | llvm llvm-project ValueSymbolTable ValueSymbolTable.cpp insert stack-based overflowhttps://vuldb.com/vuln/374581vdb-entrytechnical-description
• vuldb.comVDB-374581 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/374581/ctisignaturepermissions-required
• vuldb.comCVE-2026-13573 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-13573third-party-advisory
• vuldb.comSubmit #844457 | LLVM LLVM Project commit 3b3a3c2 Stack-based Buffer Overflowhttps://vuldb.com/submit/844457third-party-advisory
• github.comhttps://github.com/llvm/llvm-project/issues/199187issue-tracking
• github.comhttps://github.com/user-attachments/files/28141697/poc.zipbroken-linkexploit
• github.comhttps://github.com/llvm/llvm-project/product