CVE-2026-89861

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Hold vport reference in qla24xx_report_id_acquisition() In the format 1 path, the virtual port is located on ha->vp_list while holding vport_slock, but the lock is dropped before vp is used: qla_update_host_map() is called and VP_IDX_ACQUIRED/REGISTER_FC4_NEEDED/ REGISTER_FDMI_NEEDED are set on vp. No reference is taken across that window, so a concurrent qla24xx_deallocate_vp_id() can tear the vport down and free it, leading to a use-after-free. Take a vport reference (vref_count) under vport_slock when the matching vp is found, and drop it after the last use of vp. qla24xx_deallocate_vp_id() waits for vref_count to reach zero before unlinking and freeing the vport, so the pointer stays valid. This matches the reference idiom already used by the other ha->vp_list traversals.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/267533b28ddf2c9223d30ad7e6960fa9e936428e
https://git.kernel.org/stable/c/47272152a13d202d98496208f9bf382c1cf4d4fb
https://git.kernel.org/stable/c/4b7f0a95bfeb1d3673da4c29bbe9872a61bc1a69
https://git.kernel.org/stable/c/793cedee296fd819bfadc2a7ec4d52faf9c09a0a
https://git.kernel.org/stable/c/d09ef32af1e05d79f29b460521a20bc4e6fd2ecf
https://git.kernel.org/stable/c/d556f899964d184e6cb788f3fa9dcddcafe1ab2d
https://git.kernel.org/stable/c/f6b3bcc7cb2f4c37464958b9fd97dc7f185ea297
https://git.kernel.org/stable/c/f8d2eb510c063a8ca79a5dc766a4303d3925fe83

Configurations

No configuration.

History

16 Sep 2026, 15:18

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.1

Information

Published : 2026-09-16 11:16

Updated : 2026-09-16 15:18

NVD link : CVE-2026-89861

Mitre link : CVE-2026-89861

CVE.ORG link : CVE-2026-89861

JSON object : View

Products Affected

No product.

CWE

No CWE.

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No reference is taken across that\nwindow, so a concurrent qla24xx_deallocate_vp_id() can tear the vport\ndown and free it, leading to a use-after-free.\n\nTake a vport reference (vref_count) under vport_slock when the matching\nvp is found, and drop it after the last use of\nvp. qla24xx_deallocate_vp_id() waits for vref_count to reach zero before\nunlinking and freeing the vport, so the pointer stays valid. This\nmatches the reference idiom already used by the other ha->vp_list\ntraversals."}], "lastModified": "2026-09-16T15:18:13.917", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}