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CVE-2026-53059 is an integer-truncation vulnerability in the Linux kernel device-mapper logging component. In create_log_context(), the local region_count variable is a 32-bit unsigned integer, although dm_sector_div_up() returns a 64-bit sector_t. A sufficiently large target length combined with a small region size produces a region count exceeding UINT_MAX. Truncation causes undersized allocations for the clean_bits, sync_bits, and recovering_bits bitmaps. Subsequent log operations use indices from the full region space, causing out-of-bounds access to vmalloc-allocated kernel memory. A reproduction using a large mirror target demonstrates a kernel crash in core_in_sync.
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A Linux kernel device-mapper logging vulnerability caused by truncating a 64-bit region count to 32 bits. This results in undersized bitmap allocations and subsequent out-of-bounds writes to kernel heap memory. The content provides a kernel-crash reproducer and assigns a CVSS v3 score of 7.8. Although reproduction commands are included, the plugin explicitly reports that no known exploits are available.
An out-of-bounds write in the Linux kernel device-mapper log component caused by a region_count overflow. It affects Rocky Linux 10.2 kernel packages and has available exploit code according to the plugin.
A Linux kernel device-mapper log out-of-bounds write vulnerability caused by a region_count overflow. It is the CVE used as the source for the advisory's listed CVSS scores.
Linux kernel device-mapper log out-of-bounds write caused by region-count overflow.
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Cross-references every affected SKU, including bundled OEM variants.
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