Intel Multi-Buffer Crypto for IPSec out-of-bounds write

Summaryinfo

A vulnerability, which was classified as problematic, was found in Intel Multi-Buffer Crypto for IPSec. Affected by this vulnerability is an unknown functionality. Such manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2026-35683. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability was found in Intel Multi-Buffer Crypto for IPSec (affected version not known). It has been rated as problematic. Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is integrity, and availability. CVE summarizes:

Out-of-bounds write for some Intel(R) Multi-Buffer Crypto for IPSec 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 (none), integrity (low) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

The advisory is available at intel.com. This vulnerability is handled as CVE-2026-35683 since 04/11/2026. The exploitation is known to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 11/10/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Intel

Name

• Multi-Buffer Crypto for IPSec

License

• commercial

Website

• Vendor: https://www.intel.com/

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