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CVE-2026-89853
scsi: qla2xxx: Fix FCE trace use-after-free during firmware dump
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix FCE trace use-after-free during firmware dump qla2x00_free_fce_trace() freed and cleared ha->fce while holding only fce_mutex. The firmware-dump consumers qla27xx_fwdt_entry_t264() and qla25xx_copy_fce() read ha->fce (NULL check followed by a copy of the buffer) under hardware_lock and never take fce_mutex. A debugfs FCE disable could therefore free the DMA buffer between a dump's NULL check and its copy, resulting in a use-after-free. Unpublish ha->fce under hardware_lock, then release the lock and free the DMA buffer (dma_free_coherent() may sleep). A concurrent dump either completes its check and copy with the buffer still valid, or observes ha->fce == NULL and skips it.

Details
INFO

Published Date :

Sept. 16, 2026, 11:16 a.m.

Last Modified :

Sept. 16, 2026, 11:16 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-89853 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Address use-after-free by properly managing DMA buffer access during firmware dumps.
  • Unpublish ha->fce under hardware_lock.
  • Release hardware_lock.
  • Free the DMA buffer.
  • Apply kernel patches.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-89853.

URL Resource
https://git.kernel.org/stable/c/41ef7edde27ac87d55ffc703da44e78aa8c2e896
https://git.kernel.org/stable/c/423487f03e325b8665d20a2a3171fe012b1a4fa9
https://git.kernel.org/stable/c/53298efcbbb0f0438366d45cb7ed7e6d93dd5531
https://git.kernel.org/stable/c/6003e79148eca73d7cafb076f5be47e234d543d0
https://git.kernel.org/stable/c/7bd308cd893e8cce023d03a40a2f0adccaff0175
https://git.kernel.org/stable/c/8e7a26931b6111583cfeaf49c068f26524dc3af2
https://git.kernel.org/stable/c/edc464a4fc96e2720d166e7cc7e7a6827b086760
https://git.kernel.org/stable/c/ef9b89f6c92274c3670403fd06130ca25f685050
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-89853 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-89853 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-89853 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-89853 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Sep. 16, 2026

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix FCE trace use-after-free during firmware dump qla2x00_free_fce_trace() freed and cleared ha->fce while holding only fce_mutex. The firmware-dump consumers qla27xx_fwdt_entry_t264() and qla25xx_copy_fce() read ha->fce (NULL check followed by a copy of the buffer) under hardware_lock and never take fce_mutex. A debugfs FCE disable could therefore free the DMA buffer between a dump's NULL check and its copy, resulting in a use-after-free. Unpublish ha->fce under hardware_lock, then release the lock and free the DMA buffer (dma_free_coherent() may sleep). A concurrent dump either completes its check and copy with the buffer still valid, or observes ha->fce == NULL and skips it.
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/89xxx/CVE-2026-89853.json">CVE-2026-89853</a>
    Added Reference https://git.kernel.org/stable/c/41ef7edde27ac87d55ffc703da44e78aa8c2e896
    Added Reference https://git.kernel.org/stable/c/423487f03e325b8665d20a2a3171fe012b1a4fa9
    Added Reference https://git.kernel.org/stable/c/53298efcbbb0f0438366d45cb7ed7e6d93dd5531
    Added Reference https://git.kernel.org/stable/c/6003e79148eca73d7cafb076f5be47e234d543d0
    Added Reference https://git.kernel.org/stable/c/7bd308cd893e8cce023d03a40a2f0adccaff0175
    Added Reference https://git.kernel.org/stable/c/8e7a26931b6111583cfeaf49c068f26524dc3af2
    Added Reference https://git.kernel.org/stable/c/edc464a4fc96e2720d166e7cc7e7a6827b086760
    Added Reference https://git.kernel.org/stable/c/ef9b89f6c92274c3670403fd06130ca25f685050
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
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