CVE-2026-90414 Linux Kernel IB/isert - Out-of-Bounds Read

Linux kernel IB/isert contains an out-of-bounds read vulnerability caused by accepting PDUs declaring more data than actually received, letting remote initiators cause memory corruption, exploit requires a malicious initiator after login.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.51% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Read
Impact
Denial Of Service, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the patch that validates PDU lengths against actual received data.

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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