CVE-2022-29486Network attack vector

Privilege escalation via unbounded expression length scan

Published Nov 11, 2022 · Updated Feb 5, 2025

Buffer over-read in Hyperscan before 5.4.0 allows remote attackers to gain privileges via a crafted regular-expression input. The addExpression routine in src/compiler/compiler.cpp calls unbounded strlen on the supplied expression before enforcing the configured pattern-length limit, permitting a read past an unterminated buffer. Reachability requires a consuming application to pass network-derived expression data and user interaction; Intel limits the reported consequence to an integrity change.

CVSS severity4.3
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer over-read in Hyperscan before 5.4.0 allows remote attackers to gain privileges via a crafted regular-expression input. The addExpression routine in src/compiler/compiler.cpp calls unbounded strlen on the supplied expression before enforcing the configured pattern-length limit, permitting a read past an unterminated buffer. Reachability requires a consuming application to pass network-derived expression data and user interaction; Intel limits the reported consequence to an integrity change.

The record

CVE
CVE-2022-29486
Published
Nov 11, 2022
Updated
Feb 5, 2025
Vendor
Topcon Positioning Systems, Inc.
Product
Hyperscan
Classifications
CWE-119, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Feb 5, 2025Record 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=all versions downloaded before 04/29/2022

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Topcon Positioning Systems, Inc. · Hyperscanversion=all versions downloaded before 04/29/2022

Published CVSS scores

4.3Intel CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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