Bug 2541036 (CVE-2026-97951)

Summary: CVE-2026-97951 kernel: scsi: target: iscsi: Fix hang for aborted WRITE_PENDING commands
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's iSCSI (Internet Small Computer Systems Interface) target subsystem. A remote client can trigger a Denial of Service (DoS) by sending remaining data packets for a write request that was aborted by a device reset command. Because the subsystem fails to signal completion for the canceled operation, the worker thread hangs indefinitely, resulting in a thread deadlock.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-09-25 10:44:46 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: target: iscsi: Fix hang for aborted WRITE_PENDING commands

When a LUN_RESET aborts a WRITE command that is in the
TRANSPORT_WRITE_PENDING state, the target core sets CMD_T_ABORTED and
waits for the frontend to finish processing.

If the initiator subsequently sends the remaining dataout PDUs,
__iscsit_check_dataout_hdr() catches the payload, stops the dataout
timer if the sequence is final and finally dumps the data.  However, the
iSCSI target doesn't trigger the completion process for these aborted
commands. Because of this, the abort path hangs indefinitely in
target_put_cmd_and_wait(), leading to a deadlocked target worker thread.

Fix this by explicitly calling target_complete_cmd() when the final
dataout PDU is received for an aborted WRITE command.
target_complete_cmd() detects the CMD_T_ABORTED flag and cleanly routes
the command into target_abort_work, allowing the abort completion to
successfully unblock.
Comment 1 gkamathe 2026-09-30 02:04:56 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97951.mbox