7.5 High

In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi: Validate the task named by a management response…

CVE-2026-99152

In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi: Validate the task named by a management response iscsicompletepdu() fetches the task for five response types from one place and checks only that the index resolved: case ISCSIOPLOGOUTRSP: case ISCSIOPLOGINRSP: case ISCSIOPTEXTRSP: case ISCSIOPSCSITMFUNCRSP: case ISCSIOPNOOPIN: task = iscsiitttotask(conn, hdr->itt); if (!task) return ISCSIERRBADITT; iscsiitttotask() bounds the index against cmdsmax and looks at nothing else, so a target can name any slot in the pool, including one that has never been used. task->conn is then NULL, and both iscsinopoutrsp() and iscsicompletetask() dereference it. One unsolicited NOP-In is enough; a Text Response carrying the same ITT crashes in iscsicompletetask() instead. Require the task to be in flight and not a SCSI command, the way iscsiitttoctask() does for the command opcodes. [ 6.298634] Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN NOPTI [ 6.298642] KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] [ 6.298652] CPU: 1 UID: 0 PID: 111 Comm: iscsistart Not tainted…

Assessment

CVSS: 7.5 (v3.1)
Severity: High
EPSS: 0.18% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 28 October 2026
Last updated: 31 October 2026
Affected: Linux
Assigner: Linux

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

At the source

EUVD (ENISA)

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