SB20260816458 - Improper input validation in Linux kernel microsoft mana driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: CVE-2026-72065)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows an attacker with physical access to cause a denial of service.

The vulnerability exists due to improper input validation in the mana RX completion queue handling in mana_process_rx_cqe() when processing packet length values reported by the NIC. An attacker with physical access can supply an invalid packet length via a malicious or compromised NIC device to cause a denial of service.

The reported packet length is supplied by the NIC device and is not sufficiently validated before skb processing.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/282c5214ca4eb3799158c76782646e86d2945d1b
• https://git.kernel.org/stable/c/2e276b14b6d378372bf0152df89286cbe7632fb0
• https://git.kernel.org/stable/c/2e2a83b4998af4384e677d3b2ac08565274279bf
• https://git.kernel.org/stable/c/6080189291d958604dcefe513a13900835ac982f
• https://git.kernel.org/stable/c/6d13eaa13341a8f80aaf86f78591e1b1d393711d