{"id":"CVE-2024-39482","summary":"bcache: fix variable length array abuse in btree_iter","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbcache: fix variable length array abuse in btree_iter\n\nbtree_iter is used in two ways: either allocated on the stack with a\nfixed size MAX_BSETS, or from a mempool with a dynamic size based on the\nspecific cache set. Previously, the struct had a fixed-length array of\nsize MAX_BSETS which was indexed out-of-bounds for the dynamically-sized\niterators, which causes UBSAN to complain.\n\nThis patch uses the same approach as in bcachefs's sort_iter and splits\nthe iterator into a btree_iter with a flexible array member and a\nbtree_iter_stack which embeds a btree_iter as well as a fixed-length\ndata array.","modified":"2026-04-16T04:37:15.970880178Z","published":"2024-07-05T06:55:10.599Z","related":["SUSE-SU-2024:2802-1","SUSE-SU-2024:2894-1","SUSE-SU-2024:2896-1","SUSE-SU-2024:2939-1","SUSE-SU-2024:2947-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39482.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0c31344e22dd8d6b1394c6e4c41d639015bdc671"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2c3d7b03b658dc8bfa6112b194b67b92a87e081b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5a1922adc5798b7ec894cd3f197afb6f9591b023"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6479b9f41583b013041943c4602e1ad61cec8148"},{"type":"WEB","url":"https://git.kernel.org/stable/c/934e1e4331859183a861f396d7dfaf33cb5afb02"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39482.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-39482"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cafe563591446cf80bfbc2fe3bc72a2e36cf1060"},{"fixed":"2c3d7b03b658dc8bfa6112b194b67b92a87e081b"},{"fixed":"5a1922adc5798b7ec894cd3f197afb6f9591b023"},{"fixed":"934e1e4331859183a861f396d7dfaf33cb5afb02"},{"fixed":"6479b9f41583b013041943c4602e1ad61cec8148"},{"fixed":"0c31344e22dd8d6b1394c6e4c41d639015bdc671"},{"fixed":"3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-39482.json"}}],"schema_version":"1.7.5"}