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              "value": "AV:L - The UAF is reached only through the local write() syscall path (gfs2_file_write_iter \u2192 iomap_file_buffered_write \u2192 gfs2_iomap_begin) on a locally-mounted GFS2 filesystem; it is not exposed to any network protocol.\nAC:L - The bug triggers when the freed dibh page is reclaimed before the inline memcpy; this memory-reclaim window is attacker-influenceable through memory pressure and by stalling copy_from_iter, and per UAF guidance such races are Low.\nPR:L - Triggering only requires writing a small amount of data to a stuffed file on an already-mounted GFS2 filesystem, achievable by a basic unprivileged local user with write access to any file.\nUI:N - The attacker performs the write themselves; in the normal scenario of an already-mounted GFS2 cluster filesystem no separate victim action is required.\nS:U - The corruption stays within the kernel\u0027s own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - A use-after-free gives the attacker control over the contents of the freed/reallocated page, which per kernel UAF guidance can be leveraged toward arbitrary kernel memory disclosure.\nI:H - The UAF performs a memcpy of attacker-controlled file data into a freed and potentially reallocated kernel page, enabling corruption of adjacent kernel objects and an arbitrary-write primitive.\nA:H - Writing into freed memory corrupts kernel state and reliably causes an oops/panic, as evidenced by the KASAN use-after-free report."
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    "dateReserved": "2026-05-13T15:03:33.090Z",
    "dateUpdated": "2026-09-15T12:04:29.229Z",
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