SB2026032601 - Splunk Universal Forwarder update for third-party components

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Type confusion (CVE-ID: CVE-2026-22796)

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a type confusion error within the PKCS7_digest_from_attributes() function. A remote attacker can pass specially crafted PKCS#7 data to the application, trigger a type confusion error and perform a denial of service attack.

2) Stack-based buffer overflow (CVE-ID: CVE-2025-15467)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when parsing CMS AuthEnvelopedData structures that use AEAD ciphers such as AES-GCM, the IV (Initialization Vector) encoded in the ASN.1 parameters. A remote attacker can supply a specially crafted CMS message with an oversized IV, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

3) NULL pointer dereference (CVE-ID: CVE-2026-22795)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when parsing PKCS#12 file. A remote attacker can pass a specially crafted PKCS#12 file to the application and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://advisory.splunk.com/advisories/SVD-2026-0314