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CVE-2026-89845

Unknown

Last modified

CVE-2026-89845 is a vulnerability of currently unknown severity. 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()).

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b, < c845f2597787ef70159a32566669e308b2807a56; >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b, < fe04b31e386aee4cc3a18f07462af146037dc389; >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b, < 1b995cf4157465357d66ba096e7cdaafab9972e7; >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b, < d79376fbd2a076de82c1cd8aa0b600b300c75a44; >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b, < 1c90b74e484ba48f31944fe04963d99e01ac3767; >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b, < 5dd9bec8004ba93cee8b689bf54ce294f59e5e3c; >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b, < 35124cfa9898b2088ee72859e573e0876aff66fc; >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b, < deb8abde83a799d2501f3977f6d6051000253f5e
LinuxLinux3.4

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89845?
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.
How severe is CVE-2026-89845?
Severity scoring for CVE-2026-89845 is pending analysis.
How do I fix CVE-2026-89845?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST