CVE-2026-89862 scsi: qla2xxx: Fix BSG job leak on validate flash image error path
A resource leak in the qla2xxx SCSI driver allows local attackers to exhaust block layer resources, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89862?
CVE-2026-89862 is a denial of service 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: Fix BSG job leak on validate flash image error path
qla28xx_validate_flash_image() returns QLA_SUCCESS (0) unconditionally, telling the FC BSG transport (fc_bsg_host_dispatch()) that the driver owns and will complete the request. But bsg_job_done() is guarded by "if (!rval)", so on the error path (rval == -EINVAL) neither the driver nor the transport completes the job. The request dangles until it times out, leaking block layer resources.
Commit c2c68225b145 ("scsi: qla2xxx: Fix bsg_done() causing double free") added the "if (!rval)" guard to a batch of BSG handlers. That is correct for handlers that also return the error code (the transport then completes the job once via fail_host_msg), but this function returns QLA_SUCCESS unconditionally, so the guard turned a correct single completion into a leak.
Always call bsg_job_done(): bsg_reply->result is DID_OK and the error is reported in vendor_rsp[0], and since the function returns 0 the transport will not complete the job a second time.
Which versions are affected by CVE-2026-89862?
How do I fix CVE-2026-89862?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-89862 being exploited?
There is no known exploitation of CVE-2026-89862 in the wild and no public exploit code.
Sources
Also known as AZL-101271, BELL-CVE-2026-89862, DEBIAN-CVE-2026-89862, GHSA-pqg5-73mw-qfjw, UBUNTU-CVE-2026-89862.