CVE-2026-98323 Linux kernel RDMA/siw - Out of Bounds Write

Linux kernel RDMA/siw contains an out-of-bounds write caused by incorrect header copy length calculation in siw_get_hdr(), letting attackers trigger memory corruption via fragmented extended DDP/RDMAP headers, exploit requires crafted TCP packets.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.56% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Write
Impact
Out Of Bounds Rw
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
6 October 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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