CVE-2026-98323

9.8 CRITICAL

Published 2026-10-06 · Updated 2026-10-07

AI risk analysis

Summary: This vulnerability allows an attacker to perform an out-of-bounds write by manipulating the RDMA header copy process, potentially leading to kernel memory corruption or arbitrary code execution.
Exploitability: Exploitation requires control over the RDMA network and precise timing to overwrite critical kernel structures. Precondition is the presence of an extended DDP/RDMAP header across multiple TCP callbacks.
Blast radius: If exploited, the vulnerability could lead to full system compromise, including potential RCE, data exfiltration, or denial of service.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the Linux kernel version 6.1.15 or later.

rdmakernelmemory-corruptionexploit

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Bound fragmented header copies by the remaining length siw_get_hdr() can receive an extended DDP/RDMAP header across more than one TCP callback. The first callback may receive most of the header, while the next one still limits the copy to hdrlen - MIN_DDP_HDR instead of the number of missing bytes. This makes the destination move past the end of the header and overwrite the receive state, including fpdu_part_rcvd. A later callback can then use a negative fpdu_part_rcvd value as a copy offset, which creates an OOB write. Use the number of header bytes already received when calculating the next copy length.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

Related CVEs

Related by shared AI tags and CWE weakness class. Browse the full archive.