In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry()
qla2x00_error_entry() reads ha->req_q_map[que] twice: once for the NULL
check and again when assigning it to req. The map slot is cleared by
qla25xx_free_req_que() (ha->req_q_map[que_id] = NULL under mq_lock)
during queue teardown, while the response-queue interrupt that drives
qla2x00_error_entry() is still registered (the IRQ is released later in
qla25xx_free_rsp_que()). If the slot is set to NULL between the two
reads, req becomes NULL and is dereferenced.
Read the slot once into req and NULL-check the local before use. mq_lock
is a mutex and cannot be taken from interrupt context, so the single
read plus local check is the appropriate fix for the reported NULL
dereference.
CVSS
No CVSS.
References
Configurations
No configuration.
History
No history.
Information
Published : 2026-09-16 11:16
Updated : 2026-09-16 11:16
NVD link : CVE-2026-89845
Mitre link : CVE-2026-89845
CVE.ORG link : CVE-2026-89845
JSON object : View
Products Affected
No product.
CWE
No CWE.