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.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00184.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/262dcd809723723ed8a4e05437ec7e9c21a8f17e cve-icon cve-icon
https://git.kernel.org/stable/c/2c6fbcf4bfac0b2b186acc8d91154c0fa24468a7 cve-icon cve-icon
https://git.kernel.org/stable/c/8628f8ebf41669302513fb3f0bf0eba38b226742 cve-icon cve-icon
https://git.kernel.org/stable/c/9ff797e516dbc1ecb73701ec4c24055712d44411 cve-icon cve-icon
https://git.kernel.org/stable/c/af9f5b474a260ad23ffb9793d716a5e3bbce3b48 cve-icon cve-icon
https://git.kernel.org/stable/c/b72dcfb9bf1f0f0147cda03dc59e4002a315067f cve-icon cve-icon
https://git.kernel.org/stable/c/e6bdfdf3bcb02d0d626a45e8c98b7e63d2fddf9d cve-icon cve-icon
https://git.kernel.org/stable/c/eb4d7a946970469b3ab0c762432bf161d5b0836c cve-icon cve-icon
History

Tue, 06 Oct 2026 13:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
CWE-787

Tue, 06 Oct 2026 09:00:00 +0000

Type Values Removed Values Added
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.
Title RDMA/siw: Bound fragmented header copies by the remaining length
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-10-06T08:46:17.150Z

Reserved: 2026-09-25T10:25:14.340Z

Link: CVE-2026-98323

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-06T09:18:24.403

Modified: 2026-10-06T09:18:24.403

Link: CVE-2026-98323

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-06T17:00:04Z

Weaknesses