CVE-2026-89853

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.

CVSS

No CVSS.

References

Link	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

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-16 11:16

Updated : 2026-09-16 11:16

NVD link : CVE-2026-89853

Mitre link : CVE-2026-89853

CVE.ORG link : CVE-2026-89853

JSON object : View

Products Affected

No product.

CWE

No CWE.

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The firmware-dump consumers qla27xx_fwdt_entry_t264() and\nqla25xx_copy_fce() read ha->fce (NULL check followed by a copy of the\nbuffer) under hardware_lock and never take fce_mutex. A debugfs FCE\ndisable could therefore free the DMA buffer between a dump's NULL check\nand its copy, resulting in a use-after-free.\n\nUnpublish ha->fce under hardware_lock, then release the lock and free\nthe DMA buffer (dma_free_coherent() may sleep). A concurrent dump either\ncompletes its check and copy with the buffer still valid, or observes\nha->fce == NULL and skips it."}], "lastModified": "2026-09-16T11:16:53.040", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}