scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
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- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 7 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking qla25xx_free_req_que() and qla25xx_free_rsp_que() have two pre-existing bugs exposed on the error path of qla25xx_create_{req,rsp}_que(): 1. When dma_alloc_coherent() fails during queue creation, the error path calls the free function with req->ring / rsp->ring still NULL (from kzalloc). The unconditional dma_free_coherent() with a NULL cpu_addr is undefined behavior and can panic. 2. The free functions clear req_qid_map / rsp_qid_map under vport_lock, but the create functions protect the same bitmaps with mq_lock. This provides no mutual exclusion. Additionally, the create error path clears the bit and releases mq_lock before calling the free function, creating a window where another thread can allocate the same que_id and have its ha->req_q_map entry clobbered by the subsequent lockless NULL assignment in the free function. Fix by: - Guarding dma_free_coherent() with a NULL check on the ring pointer. - Using mq_lock (the lock held by all creators) in the free functions to atomically NULL the map entry and clear the bitmap bit. - Removing the now-redundant clear_bit blocks from the create error paths since the free functions handle it atomically.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.29 and later | 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.112, 6.18.53, 7.2.7, 7.3 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.29 and later Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.112, 6.18.53, 7.2.7, 7.3 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.112, 6.18.53, 7.2.7, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-97537
- 2026-10-03 Alias added: GHSA-46xm-fghf-r34f
- 2026-10-03 Fix available: Linux/Linux@56e25d716833604fd5bff388e472f290bfe793aa, Linux/[email protected] · CNA
- 2026-10-03 1 new reference · CNA
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-21 Fix available: Linux/Linux@2e6f60adf609c77e828f64e0cd371920bef91c12, Linux/[email protected] · CNA
- 2026-10-21 1 new reference · CNA
- 2026-10-30 Fix available: Linux/[email protected], Linux/[email protected], Linux/[email protected] +3 · CNA
- 2026-10-30 3 new references · CNA
- 2026-11-06 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/b65e3a82f77b7a63e386623d2ea70d2b5580295a
- https://git.kernel.org/stable/c/a9ff85886425355c72749be6090758aa19a89f16
- https://git.kernel.org/stable/c/81ee4df2a488f0909f7ff563e88a0e0099485a8b
- https://git.kernel.org/stable/c/2e6f60adf609c77e828f64e0cd371920bef91c12
- https://git.kernel.org/stable/c/56e25d716833604fd5bff388e472f290bfe793aa
- https://git.kernel.org/stable/c/f35cb67f2092b49d7949065dd56895ed47238f22
- https://git.kernel.org/stable/c/94fc0c5b45de2bf3a691619bcfd10b9a49fc647e
- https://git.kernel.org/stable/c/34a40e0dff940ac5eba494a69b553ea571e24873
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Sources
- CVE-2026-97537 · CVE Program
- CVE-2026-97537 · NVD
- FIRST EPSS
- GHSA-46xm-fghf-r34f · GitHub Advisory Database · CC BY 4.0
- CVE-2026-97537 · Red Hat security data · CC BY 4.0
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