High

CVE-2026-89861 — scsi: qla2xxx: Hold vport reference in qla24xx_report_id_acquisition()

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.

Published Sep 16, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Linux

CVSS base

8.1

High · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136 and < d09ef32af1e05d79f29b460521a20bc4e6fd2ecf≥ 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136 and < 4b7f0a95bfeb1d3673da4c29bbe9872a61bc1a69≥ 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136 and < 267533b28ddf2c9223d30ad7e6960fa9e936428e≥ 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136 and < f8d2eb510c063a8ca79a5dc766a4303d3925fe83≥ 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136 and < f6b3bcc7cb2f4c37464958b9fd97dc7f185ea297≥ 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136 and < 47272152a13d202d98496208f9bf382c1cf4d4fb≥ 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136 and < d556f899964d184e6cb788f3fa9dcddcafe1ab2d≥ 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136 and < 793cedee296fd819bfadc2a7ec4d52faf9c09a0a and 1 more version 2.6.23	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
8.1	CVSS 3.1	High	2.2	5.9	416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
8.1	CVSS 3.1	High	—	—	Linux via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 8.1
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 16, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/4b7f0a95bfeb1d3673da4c29bbe9872a61bc1a69
NIST National Vulnerability Database
git.kernel.org/stable/c/267533b28ddf2c9223d30ad7e6960fa9e936428e
NIST National Vulnerability Database
git.kernel.org/stable/c/f6b3bcc7cb2f4c37464958b9fd97dc7f185ea297
NIST National Vulnerability Database
git.kernel.org/stable/c/f8d2eb510c063a8ca79a5dc766a4303d3925fe83
NIST National Vulnerability Database
git.kernel.org/stable/c/d09ef32af1e05d79f29b460521a20bc4e6fd2ecf
NIST National Vulnerability Database
git.kernel.org/stable/c/793cedee296fd819bfadc2a7ec4d52faf9c09a0a
NIST National Vulnerability Database
git.kernel.org/stable/c/d556f899964d184e6cb788f3fa9dcddcafe1ab2d
NIST National Vulnerability Database
git.kernel.org/stable/c/47272152a13d202d98496208f9bf382c1cf4d4fb
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 15h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 15h
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-89861 is "scsi: qla2xxx: Hold vport reference in qla24xx_report_id_acquisition()", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.1 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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