VulnerabilityPublished 28 Oct 2026

CVE-2026-99154: Linux kernel · scsi: libiscsi: Reject a negative task index from parse_pdu_itt

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in 35b60549a956237488c89a2d85352e026e7d55b7 : update Linux kernel when convenient.

Data as of 28 Oct 2026, 10:58 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

Patch: Available – fixed in 35b60549a956237488c89a2d85352e026e7d55b7, 8ee2a09a1dbb257c9e828ad2497f8e4832dfb142, 6cadfa6f1f5896632d4223d3b7addb2a29fea74e

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to 35b60549a956237488c89a2d85352e026e7d55b7, 8ee2a09a1dbb257c9e828ad2497f8e4832dfb142 or 6cadfa6f1f5896632d4223d3b7addb2a29fea74e.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ bfead3b2cb4607c71831423c3ee97d22cd0c9dcb, < 35b60549a956237488c89a2d85352e026e7d55b7	Fixed in 35b60549a956237488c89a2d85352e026e7d55b7
LinuxLinux	Affected ≥ bfead3b2cb4607c71831423c3ee97d22cd0c9dcb, < 8ee2a09a1dbb257c9e828ad2497f8e4832dfb142	Fixed in 8ee2a09a1dbb257c9e828ad2497f8e4832dfb142
LinuxLinux	Affected ≥ bfead3b2cb4607c71831423c3ee97d22cd0c9dcb, < 6cadfa6f1f5896632d4223d3b7addb2a29fea74e	Fixed in 6cadfa6f1f5896632d4223d3b7addb2a29fea74e
LinuxLinux	Affected =2.6.33	Fixed in–

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.

References

Community reviews

Loading reviews…