CVE-2026-53706Public exploitNetwork attack vectorHinoki check available

Unsafe program admission via unchecked ALU32 pointer arithmetic

Published Sep 2, 2026 · Updated Sep 3, 2026

Incorrect calculation in PREVAIL before 0.2.4 allows remote attackers to admit unsafe eBPF programs through verification. The ADD and SUB arms in src/ir/assertions.cpp accept pointer-typed ALU32 destinations without checking is64, while the transformer preserves the pointer type after zero-extension discards its upper half. Exploitation requires access to the verifier CLI or library API; admitted programs can crash or produce incorrect runtime results.

CVSS severity8.8
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Incorrect calculation in PREVAIL before 0.2.4 allows remote attackers to admit unsafe eBPF programs through verification. The ADD and SUB arms in src/ir/assertions.cpp accept pointer-typed ALU32 destinations without checking is64, while the transformer preserves the pointer type after zero-extension discards its upper half. Exploitation requires access to the verifier CLI or library API; admitted programs can crash or produce incorrect runtime results.

The record

CVE
CVE-2026-53706
Published
Sep 2, 2026
Updated
Sep 3, 2026
Vendor
vbpf
Product
PREVAIL
Classifications
CWE-682
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record 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=< 0.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

vbpf · PREVAILversion=< 0.2.4

Published CVSS scores

8.8GitHub Security AdvisoriesCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-682Incorrect Calculation

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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