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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.51% probability · 44th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS moved from 0.2% on 29 October 2026 to 0.5% on 3 November 2026.
References
- https://git.kernel.org/stable/c/0eb06ebbbecb122f0df9a1f7f623f5255be741ed
- https://git.kernel.org/stable/c/24bd9ba431b2daa263f3551bc2f09f6b4487f5ae
- https://git.kernel.org/stable/c/35b60549a956237488c89a2d85352e026e7d55b7
- https://git.kernel.org/stable/c/6200fb2de579f268742a77b0f3d823cb0a8b1947
- https://git.kernel.org/stable/c/6cadfa6f1f5896632d4223d3b7addb2a29fea74e
- https://git.kernel.org/stable/c/8ee2a09a1dbb257c9e828ad2497f8e4832dfb142
- https://git.kernel.org/stable/c/e896a97f336c5edfc13066b57ed431cb3f64e68c
- https://git.kernel.org/stable/c/f8fabe1fe044f86abc42194b8f86dfd70212115f
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.