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.

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References

Other 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 https://git.kernel.org/stable/c/8e7a26931b6111583cfeaf49c068f26524dc3af2 https://git.kernel.org/stable/c/edc464a4fc96e2720d166e7cc7e7a6827b086760 https://git.kernel.org/stable/c/ef9b89f6c92274c3670403fd06130ca25f685050

Frequently Asked Questions

What is 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.

How do I check if I'm vulnerable to CVE-2026-89853? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-89853

Description

References

Other References

Frequently Asked Questions

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