{"id":"CVE-2026-98879","title":"isofs: handle set_blocksize failures","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nisofs: handle set_blocksize failures\n\nisofs uses buffer_heads, which don't handle block size > PAGE_SIZE well.\nWithout this, mounting we will hit the\n\n        BUG_ON(of…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6db7f0ba365786304558db6a3d52013ae176e03e","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 61f277bf35f533b602984f0e55900111fe52f31a","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cebde6d88e34396c29f2f001d90e921677cc17d6","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 28d1f6aa14f5924e36602b7a31c9141d34de0b9c","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9c97e3b1152d3092581745189f5d2f04c6404ef9","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9584ab6283721e5aab485c79bd06c2f78d89e55c","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 25ef4c4d9f0e96fb89c0ae0d7127c3f12a31bc32","Linux < 5.10.271","Linux < 5.15.222","Linux < 6.1.189","Linux < 6.6.158","Linux < 6.12.111","Linux < 6.18.53","Linux (all versions)"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T11:37:28.048Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98879","references":[{"url":"https://git.kernel.org/stable/c/6db7f0ba365786304558db6a3d52013ae176e03e"},{"url":"https://git.kernel.org/stable/c/61f277bf35f533b602984f0e55900111fe52f31a"},{"url":"https://git.kernel.org/stable/c/cebde6d88e34396c29f2f001d90e921677cc17d6"},{"url":"https://git.kernel.org/stable/c/28d1f6aa14f5924e36602b7a31c9141d34de0b9c"},{"url":"https://git.kernel.org/stable/c/9c97e3b1152d3092581745189f5d2f04c6404ef9"},{"url":"https://git.kernel.org/stable/c/9584ab6283721e5aab485c79bd06c2f78d89e55c"},{"url":"https://git.kernel.org/stable/c/25ef4c4d9f0e96fb89c0ae0d7127c3f12a31bc32"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T13:24:55.581Z","slug":"CVE-2026-98879","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nisofs: handle set_blocksize failures\n\nisofs uses buffer_heads, which don't handle block size > PAGE_SIZE well.\nWithout this, mounting we will hit the\n\n        BUG_ON(offset >= folio_size(folio));\n\nin folio_set_bh on the first __bread_gfp call.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6db7f0ba365786304558db6a3d52013ae176e03e`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 61f277bf35f533b602984f0e55900111fe52f31a`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cebde6d88e34396c29f2f001d90e921677cc17d6`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 28d1f6aa14f5924e36602b7a31c9141d34de0b9c`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9c97e3b1152d3092581745189f5d2f04c6404ef9`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9584ab6283721e5aab485c79bd06c2f78d89e55c`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 25ef4c4d9f0e96fb89c0ae0d7127c3f12a31bc32`\n- `Linux < 5.10.271`\n- `Linux < 5.15.222`\n- `Linux < 6.1.189`\n- `Linux < 6.6.158`\n- `Linux < 6.12.111`\n- `Linux < 6.18.53`\n- `Linux (all versions)`\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":[]}