CVE-2026-89843

unknown

EUVD alias: EUVD-2026-80443

Assigned by CNA: linux

Published 2026-09-16 · Modified 2026-09-16

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Zero-init bsg stack buffers to avoid info leak Several bsg handlers stage their request/reply in an uninitialized 256-byte on-stack buffer (uint8_t bsg[DMA_POOL_SIZE]) and fill it via sg_copy_to_buffer(), which only copies as many bytes as the user-supplied request payload. When the request is shorter than the structure, the remainder of the buffer is left holding stale stack data. qla2x00_read_fru_status() and qla2x00_read_i2c() then copy the full structure back to the reply payload with sg_copy_from_buffer(), leaking the uninitialized stack bytes to user space. The write/update paths do not copy the buffer back, but can feed uninitialized fields to the device. Zero the stack buffer at declaration in all five handlers, mirroring the heap kzalloc() approach, so short requests can no longer expose stale memory.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

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References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.