Intel Hyperscan: Out-of-bounds read causing denial of service
Summary
Intel Hyperscan versions before v5.4.2.1 contain an out-of-bounds read (CWE-125). A local, unauthenticated and unprivileged process can trigger it to crash or disrupt software that uses the library, causing a denial of service. No user interaction is needed, but attack requirements must be present. The CNA scores a low confidentiality impact, no integrity impact and a high availability impact. Hyperscan is embedded in products such as DPI, IDS, IPS and firewall software, so the exposure depends on those products.
Affected
- Intel Hyperscan before v5.4.2.1
- Downstream products that embed Hyperscan: Unknown.
Fixed in
- Hyperscan v5.4.2.1 or later (implied by the CNA data; not confirmed on the vendor advisory page reviewed)
Workaround
Unknown.
Exploitation
- No public proof-of-concept found
- No evidence of exploitation in the wild found; not listed in CISA KEV as far as found
Our recommendation
- Inventory installed products that use Hyperscan, such as security appliances, DPI/IDS/IPS tools and applications
- Ask the vendors when they ship a build with Hyperscan v5.4.2.1 or later and apply it
- Restrict local access on affected hosts to trusted users and processes until a fix is installed
- Check Intel advisory INTEL-SA-01511 for updates
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Intel advisory INTEL-SA-01511 intel.com
- Strix CVE record CVE-2026-40424 www.strix.ai
- Hyperscan project on GitHub github.com
- Intel security center www.intel.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, 15:33.
Original description (NVD)
Out-of-bounds read 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 no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (none) 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.
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