CVE-2026-89844 scsi: qla2xxx: Hold vport_slock for host map update in report ID acquisition
A race condition in the qla2xxx SCSI driver can corrupt internal data structures, potentially leading to system instability or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89844?
CVE-2026-89844 is a high-severity vulnerability in Linux, published on 16 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Hold vport_slock for host map update in report ID acquisition
qla24xx_report_id_acquisition() format-1 handling drops vport_slock after taking the vport reference and then calls qla_update_host_map() without the lock. That reaches qla_update_vp_map(), which mutates the ha->host_map btree via btree_insert32()/btree_update32()/btree_remove32() and is documented to require vport_slock to be held by the caller. Running it unlocked can race concurrent host_map updates and corrupt the btree.
The format-2 path in the same function already wraps its host_map update (SET_AL_PA) in vport_slock; the format-1 path is the lone outlier.
Hold vport_slock across the format-1 qla_update_host_map() call to honor the documented locking contract. The vref_count taken in the loop keeps the vport valid, so this only adds the missing host_map serialization.
Which versions are affected by CVE-2026-89844?
How do I fix CVE-2026-89844?
Apply the vendor's patch.
Is CVE-2026-89844 being exploited?
There is no known exploitation of CVE-2026-89844 in the wild and no public exploit code.
Sources
Also known as AZL-101205, BELL-CVE-2026-89844, DEBIAN-CVE-2026-89844, GHSA-8hj3-p94r-f47v, UBUNTU-CVE-2026-89844.