Intel Hyperscan: Heap-based buffer overflow allows local denial of service
Summary
A heap-based buffer overflow in Intel Hyperscan, a regex matching library, affects versions before v5.4.2.1. A local, authenticated or unauthenticated user with low complexity access may crash the affected application, causing a denial of service. The attack requires specific attack conditions and passive user interaction, and confidentiality impact is none.
Affected
- Intel Hyperscan before v5.4.2.1
- Downstream products that embed Hyperscan: unknown
Fixed in
- Hyperscan v5.4.2.1 (according to the CVE wording; not yet verified against the Intel advisory)
Workaround
Unknown. No vendor-published workaround found.
- Inventory hosts and appliances that run Hyperscan
- Restrict local shell and account access on those systems
Exploitation
- No known exploitation reported as of 10 Nov 2026 (third-party tracker)
- No public proof of concept found
Our recommendation
- Inventory systems and products that embed Hyperscan, including IDS, IPS, DPI and firewall products
- Ask your product vendors whether they are affected and when they will ship fixes
- Apply the vendor update once it is confirmed for your product; prioritise IDS, IPS and firewall hosts where local users have access
- Limit local access to trusted users and monitor for suspicious crashes or restarts
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Intel advisory INTEL-SA-01511 intel.com
- Intel security advisory index www.intel.com
- Hyperscan product repository github.com
- CVE record mirror (Strix) www.strix.ai
- Exploitation status tracker (OffSeq) radar.offseq.com
- Sibling CVE-2026-28730 tracker (fix version) radar.offseq.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 15:38.
Original description (NVD)
Heap-based buffer overflow for some Hyperscan before version v5.4.2.1 within Ring 3: User Applications may allow a denial of service. Unprivileged software adversary with an unauthenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires passive user interaction. The potential vulnerability may impact the confidentiality (none), integrity (low) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
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