{"id":"CVE-2023-53450","title":"ext4: remove a BUG_ON in ext4_mb_release_group_pa()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: remove a BUG_ON in ext4_mb_release_group_pa()\n\nIf a malicious fuzzer overwrites the ext4 superblock while it is\nmounted such that the s_first_data_block is set to…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= c9de560ded61faa5b754137b7753da252391c55a < d5bf8f7fb3ee3d99d1303ceb54599ea0599a4a5b","Linux >= c9de560ded61faa5b754137b7753da252391c55a < ef16d8a1798db1a1604ac44ca1bd73ec6bebf483","Linux >= c9de560ded61faa5b754137b7753da252391c55a < 185062a21976fbc38f2efd296951b02c4500cf65","Linux >= c9de560ded61faa5b754137b7753da252391c55a < b0fc279de4bf17e1710bb7e83906538ff8f11111","Linux >= c9de560ded61faa5b754137b7753da252391c55a < 978e5e9111af18741449b81fefd531a622dd969a","Linux >= c9de560ded61faa5b754137b7753da252391c55a < d87a4e4094c9879fc8acdff8ce59fdffa979c8e0","Linux >= c9de560ded61faa5b754137b7753da252391c55a < bf2a16eb4e6d06124bd8436d4546f61539a65f29","Linux >= c9de560ded61faa5b754137b7753da252391c55a < 53c14e7cc2257191ba15425c15638fc4f8abb92b","Linux >= c9de560ded61faa5b754137b7753da252391c55a < 463808f237cf73e98a1a45ff7460c2406a150a0b","Linux 2.6.25"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:20:53.399256Z"},"published":"2025-10-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:31:09.229Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53450","references":[{"url":"https://git.kernel.org/stable/c/d5bf8f7fb3ee3d99d1303ceb54599ea0599a4a5b"},{"url":"https://git.kernel.org/stable/c/ef16d8a1798db1a1604ac44ca1bd73ec6bebf483"},{"url":"https://git.kernel.org/stable/c/185062a21976fbc38f2efd296951b02c4500cf65"},{"url":"https://git.kernel.org/stable/c/b0fc279de4bf17e1710bb7e83906538ff8f11111"},{"url":"https://git.kernel.org/stable/c/978e5e9111af18741449b81fefd531a622dd969a"},{"url":"https://git.kernel.org/stable/c/d87a4e4094c9879fc8acdff8ce59fdffa979c8e0"},{"url":"https://git.kernel.org/stable/c/bf2a16eb4e6d06124bd8436d4546f61539a65f29"},{"url":"https://git.kernel.org/stable/c/53c14e7cc2257191ba15425c15638fc4f8abb92b"},{"url":"https://git.kernel.org/stable/c/463808f237cf73e98a1a45ff7460c2406a150a0b"}],"tags":["cve.org"],"epss":0.00163,"epssPercentile":0.05561,"ingestedAt":"2026-11-05T22:38:31.795Z","slug":"CVE-2023-53450","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\next4: remove a BUG_ON in ext4_mb_release_group_pa()\n\nIf a malicious fuzzer overwrites the ext4 superblock while it is\nmounted such that the s_first_data_block is set to a very large\nnumber, the calculation of the block group can underflow, and trigger\na BUG_ON check.  Change this to be an ext4_warning so that we don't\ncrash the kernel.\n\n## Affected\n\n- `Linux >= c9de560ded61faa5b754137b7753da252391c55a < d5bf8f7fb3ee3d99d1303ceb54599ea0599a4a5b`\n- `Linux >= c9de560ded61faa5b754137b7753da252391c55a < ef16d8a1798db1a1604ac44ca1bd73ec6bebf483`\n- `Linux >= c9de560ded61faa5b754137b7753da252391c55a < 185062a21976fbc38f2efd296951b02c4500cf65`\n- `Linux >= c9de560ded61faa5b754137b7753da252391c55a < b0fc279de4bf17e1710bb7e83906538ff8f11111`\n- `Linux >= c9de560ded61faa5b754137b7753da252391c55a < 978e5e9111af18741449b81fefd531a622dd969a`\n- `Linux >= c9de560ded61faa5b754137b7753da252391c55a < d87a4e4094c9879fc8acdff8ce59fdffa979c8e0`\n- `Linux >= c9de560ded61faa5b754137b7753da252391c55a < bf2a16eb4e6d06124bd8436d4546f61539a65f29`\n- `Linux >= c9de560ded61faa5b754137b7753da252391c55a < 53c14e7cc2257191ba15425c15638fc4f8abb92b`\n- `Linux >= c9de560ded61faa5b754137b7753da252391c55a < 463808f237cf73e98a1a45ff7460c2406a150a0b`\n- `Linux 2.6.25`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}