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CVE-2026-53059 is a Linux kernel vulnerability in the device-mapper log component, specifically in create_log_context() in drivers/md/dm-log.c. The flaw arises because the local variable region_count was declared as a 32-bit unsigned int while dm_sector_div_up() returns a 64-bit sector_t. On sufficiently large device-mapper targets with a small region size, the computed region count can exceed UINT_MAX and be truncated when stored in the 32-bit variable. The truncated value is then used to calculate bitset_size, causing the clean_bits, sync_bits, and recovering_bits bitsets to be allocated substantially smaller than required for the true number of regions. Subsequent log operations, including log_set_bit, log_clear_bit, and log_test_bit, use region indices derived from the full untruncated region space and can write past the end of the vmalloc-allocated kernel heap buffers. This results in kernel heap memory corruption and can trigger crashes such as faults in core_in_sync().
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No public exploit code observed for this vulnerability.
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18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel device-mapper log vulnerability involving an out-of-bounds write caused by region_count overflow.
A Linux kernel device-mapper log vulnerability involving an out-of-bounds write due to region_count overflow.
A Linux kernel device-mapper log vulnerability involving an out-of-bounds write caused by region_count overflow.
A Linux kernel device-mapper log vulnerability causing an out-of-bounds write due to region_count overflow.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.