CVE-2026-90011 Linux Kernel scsi target iscsi - Out of Bounds Read

Linux kernel scsi target iscsi contains a buffer overflow caused by insufficient allocation for a NUL terminator in login payload buffer, letting unauthenticated initiators potentially read adjacent memory, exploit requires iscsi portal configured for CHAP authentication.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.82% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version with the fix allocating an extra byte for NUL terminator.

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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