{"id":"CVE-2024-39482","revision":"649497eeabc14c60bf82a4a4907421e4","records":[{"revision":"649497eeabc14c60bf82a4a4907421e4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-39482","aliases":[],"title":"bcache: fix variable length array abuse in btree_iter","description":"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.","state":0,"publishedAt":"2024-07-05T06:55:10.599+00:00","modifiedAt":"2026-10-15T00:44:17.063+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/md/bcache/bset.c\",\n                        \"drivers/md/bcache/bset.h\",\n                        \"drivers/md/bcache/btree.c\",\n                        \"drivers/md/bcache/super.c\",\n                        \"drivers/md/bcache/sysfs.c\",\n                        \"drivers/md/bcache/writeback.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"cafe563591446cf80bfbc2fe3bc72a2e36cf1060\",\n                            \"lessThan\": \"2c3d7b03b658dc8bfa6112b194b67b92a87e081b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cafe563591446cf80bfbc2fe3bc72a2e36cf1060\",\n                            \"lessThan\": \"5a1922adc5798b7ec894cd3f197afb6f9591b023\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cafe563591446cf80bfbc2fe3bc72a2e36cf1060\",\n                            \"lessThan\": \"934e1e4331859183a861f396d7dfaf33cb5afb02\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cafe563591446cf80bfbc2fe3bc72a2e36cf1060\",\n                            \"lessThan\": \"6479b9f41583b013041943c4602e1ad61cec8148\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cafe563591446cf80bfbc2fe3bc72a2e36cf1060\",\n                            \"lessThan\": \"0c31344e22dd8d6b1394c6e4c41d639015bdc671\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cafe563591446cf80bfbc2fe3bc72a2e36cf1060\",\n                            \"lessThan\": \"3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/md/bcache/bset.c\",\n                        \"drivers/md/bcache/bset.h\",\n                        \"drivers/md/bcache/btree.c\",\n                        \"drivers/md/bcache/super.c\",\n                        \"drivers/md/bcache/sysfs.c\",\n                        \"drivers/md/bcache/writeback.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.10\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.10\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.221\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.162\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.94\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.34\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.9.5\",\n                            \"lessThanOrEqual\": \"6.9.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.10\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/2c3d7b03b658dc8bfa6112b194b67b92a87e081b","https://git.kernel.org/stable/c/5a1922adc5798b7ec894cd3f197afb6f9591b023","https://git.kernel.org/stable/c/934e1e4331859183a861f396d7dfaf33cb5afb02","https://git.kernel.org/stable/c/6479b9f41583b013041943c4602e1ad61cec8148","https://git.kernel.org/stable/c/0c31344e22dd8d6b1394c6e4c41d639015bdc671","https://git.kernel.org/stable/c/3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-39482","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-39482","identifiers":["CVE-2024-39482"]},"retained":false,"historicalAffected":[]}],"coverage":[]}