https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 16:44:30 +0000 https://vulnerability.circl.lu/vuln/cve-2026-72105 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>dm-log: fix a bitset_size overflow on 32bit machines</p> <p>Commit c20e36b7631d (&#34;dm log: fix out-of-bounds write due to region_count overflow&#34;) made sure that region_count could fit in an unsigned int. But the bitmap memory isn&#39;t allocated based on region_count. It uses bitset_size (a size_t variable). The first step of calculating bitset_size is to set it to region_count, rounded up to a multiple of BITS_PER_LONG. If region_size is less than BITS_PER_LONG smaller than UINT_MAX, it will get rounded up to 2^32. On a 32bit architecture, this will make bitset_size wrap around to 0 and fail, despite region_count being valid.</p> <p>Since bitset_size gets divided by 8, it can hold any valid region_count. It just needs a special case to handle the rollover. If it is 0, the value rolled over, and bitset size should be set to the number of bytes needed to hold 2^32 bits.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>dm-log: fix a bitset_size overflow on 32bit machines</p> <p>Commit c20e36b7631d (&#34;dm log: fix out-of-bounds write due to region_count overflow&#34;) made sure that region_count could fit in an unsigned int. But the bitmap memory isn&#39;t allocated based on region_count. It uses bitset_size (a size_t variable). The first step of calculating bitset_size is to set it to region_count, rounded up to a multiple of BITS_PER_LONG. If region_size is less than BITS_PER_LONG smaller than UINT_MAX, it will get rounded up to 2^32. On a 32bit architecture, this will make bitset_size wrap around to 0 and fail, despite region_count being valid.</p> <p>Since bitset_size gets divided by 8, it can hold any valid region_count. It just needs a special case to handle the rollover. If it is 0, the value rolled over, and bitset size should be set to the number of bytes needed to hold 2^32 bits.</p> https://vulnerability.circl.lu/vuln/cve-2026-72105