Live › vulnerability › CVE-2026-99154
Go to dashboardThe Linux kernel's libiscsi accepted a negative task index from a transport's PDU parser, so the driver read session command memory before the array. A target sending a crafted unsolicited NOP-In on a be2iscsi adapter can trigger this out-of-bounds read.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-28 11:32 UTC. All times on this page are UTC.
Only hosts that use iSCSI initiator sessions through the be2iscsi driver are exposed, since the bad index comes from that driver's handling of the target's ITT. Systems without be2iscsi hardware or without iSCSI sessions can likely skip it.
No product ranges from the sources yet.
uname -r and compare against the fixed kernel builds in your distribution's advisorybe2iscsi module is loaded with lsmod | grep be2iscsiEach row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
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