{"apiVersion":"1.0","identifier":"CVE-2026-72225","description":"In the Linux kernel, the following vulnerability has been resolved: jbd2: fix integer underflow in jbd2_journal_initialize_fast_commit() jbd2_journal_initialize_fast_commit() validates journal capacity by checking (journal->j_last - num_fc_blks < JBD2_MIN_JOURNAL_BLOCKS). Both j_last and num_fc_blks are unsigned, so when num_fc_blks exceeds j_last the subtraction wraps to a large value, bypassing the bounds check. The resulting underflow corrupts j_last, j_fc_first, and j_free, leading to journal abort. Fix by checking num_fc_blks against j_last before the subtraction, returning -EFSCORRUPTED.","publishedAt":"2026-08-15T06:21:41","lastModifiedAt":"2026-08-23T13:16:41","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72225","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00177,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72225","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72225","en":"https://www.redsauce.net/en/cves/CVE-2026-72225","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72225","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72225","de":"https://www.redsauce.net/de/cves/CVE-2026-72225","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72225","el":"https://www.redsauce.net/el/cves/CVE-2026-72225"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72225"}}