scsi: qla2xxx: Zero SFP DMA buffer in FRU/I2C bsg handlers
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: Zero SFP DMA buffer in FRU/I2C bsg handlers The FRU and I2C bsg handlers stage their transfer in a DMA_POOL_SIZE (256-byte) bounce buffer obtained from dma_pool_alloc(), which does not zero the allocation. They initialize only a few leading bytes before handing the buffer to qla2x00_write_sfp(). qla2x00_write_sfp() can override the transfer length with a user-supplied value: if (len == 1) opt |= BIT_0; if (opt & BIT_0) len = *sfp; *sfp is the first byte of the (user-controlled) payload, so len can grow up to 255. The device then DMA-reads len bytes from the 256-byte pool buffer. Since only a small prefix was written (e.g. MAX_FRU_SIZE == 36 bytes for a FRU version, one byte for a FRU status register), the hardware reads past the initialized region and writes up to ~219 bytes of stale DMA-pool heap memory to the device flash. Allocate the buffer with dma_pool_zalloc() in all five FRU/I2C handlers so any bytes beyond the initialized data are zero rather than stale heap contents.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5, 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-2026-89865
- 2026-10-03 Alias added: GHSA-rqfh-jqm9-82qm
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-04 Affected versions changed · Red Hat
- 2026-11-04 CVSS score added · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/a476377a66897549dd49bee319f4df66623417b7
- https://git.kernel.org/stable/c/09703bc7c0be3a7a155b0ff5f21f6765ba3f519c
- https://git.kernel.org/stable/c/97c45c75f5cdec96b1a4fba8b1d55d0dd01af1e8
- https://git.kernel.org/stable/c/84bde5ce4038d9ad811e5c994305bbfcbd7a9f79
- https://git.kernel.org/stable/c/581590f560b74399151b3cbc88574424c2f3d2dc
- https://git.kernel.org/stable/c/b157256c28086c434afd70cc78bf9b4d8caf1276
- https://git.kernel.org/stable/c/a5501c42256235523c4dddf799f032dfbf4f4c77
- https://git.kernel.org/stable/c/b47d4a1547d9ef21b2e9d1a739fe2204d4be05dc
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Sources
- CVE-2026-89865 · CVE Program
- CVE-2026-89865 · NVD
- FIRST EPSS
- GHSA-rqfh-jqm9-82qm · GitHub Advisory Database · CC BY 4.0
- CVE-2026-89865 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences