NULL Pointer Dereference in Linux Kernel's dm-integrity Device

CVE-2026-99087

What is CVE-2026-99087?

A vulnerability in the Linux kernel's dm-integrity device related to a NULL pointer dereference has been addressed. When the SB_FLAG_DIRTY_BITMAP flag is set and the device is activated in 'R' mode, the dm_integrity_resume function may crash due to an invalid journal read attempt. This issue has been mitigated by updating the dm-integrity logic to prevent writes during 'R' mode activation, enhancing overall system stability.

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