CVE-2026-99154

In the Linux kernel, the following vulnerability has been resolved:

scsi: libiscsi: Reject a negative task index from parse pdu itt

A transport that implements parse pdu itt hands libiscsi an index taken from the PDU, and both lookups bound it from above only:

if (i >= session->cmds max)

i and cmds max are both int, so a negative index passes and session->cmds[i] is read from before the array.

be2iscsi produces one. beiscsi parse pdu() assigns the raw tag,

*index = (int)itt;

and beiscsi complete pdu() forwards an unsolicited NOP-In from the hardware async ring without replacing its ITT, so the value is the target's. It also reports the session's own age rather than the one in the tag, which leaves the age comparison in iscsi verify itt() with nothing to reject.

Bound the index from below in both lookups.