{"apiVersion":"1.0","identifier":"CVE-2026-72105","description":"In the Linux kernel, the following vulnerability has been resolved: dm-log: fix a bitset_size overflow on 32bit machines Commit c20e36b7631d (-dm log: fix out-of-bounds write due to region_count overflow-) made sure that region_count could fit in an unsigned int. But the bitmap memory isn-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. 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.","publishedAt":"2026-08-15T06:21:24","lastModifiedAt":"2026-08-17T06:18:09","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72105","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00169,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72105","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72105","en":"https://www.redsauce.net/en/cves/CVE-2026-72105","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72105","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72105","de":"https://www.redsauce.net/de/cves/CVE-2026-72105","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72105","el":"https://www.redsauce.net/el/cves/CVE-2026-72105"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72105"}}