CVE-2026-89853

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.

References

• 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