{"id":"CVE-2024-49850","state":"PUBLISHED","title":"bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos\n\nIn case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL\nreferencing a non-existing BTF type, function bpf_core_calc_relo_insn\nwould cause a null pointer deference.\n\nFix this by adding a proper check upper in call stack, as malformed\nrelocation records could be passed from user space.\n\nSimplest reproducer is a program:\n\n    r0 = 0\n    exit\n\nWith a single relocation record:\n\n    .insn_off = 0,          /* patch first instruction */\n    .type_id = 100500,      /* this type id does not exist */\n    .access_str_off = 6,    /* offset of string \"0\" */\n    .kind = BPF_CORE_TYPE_ID_LOCAL,\n\nSee the link for original reproducer or next commit for a test case.","publishedAt":"2024-10-21T12:18:44.098Z","updatedAt":"2026-05-11T20:40:25.766Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"74753e1462e77349525daf9eb60ea21ed92d3a97","status":"affected","lessThan":"dc7ce14f00bcd50641f2110b7a32aa6552e0780f","versionType":"git"},{"version":"74753e1462e77349525daf9eb60ea21ed92d3a97","status":"affected","lessThan":"2288b54b96dcb55bedebcef3572bb8821fc5e708","versionType":"git"},{"version":"74753e1462e77349525daf9eb60ea21ed92d3a97","status":"affected","lessThan":"584cd3ff792e1edbea20b2a7df55897159b0be3e","versionType":"git"},{"version":"74753e1462e77349525daf9eb60ea21ed92d3a97","status":"affected","lessThan":"e7e9c5b2dda29067332df2a85b0141a92b41f218","versionType":"git"},{"version":"74753e1462e77349525daf9eb60ea21ed92d3a97","status":"affected","lessThan":"3d2786d65aaa954ebd3fcc033ada433e10da21c4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/btf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.113","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.54","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.13","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11.2","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/btf.c"]}],"references":["https://git.kernel.org/stable/c/dc7ce14f00bcd50641f2110b7a32aa6552e0780f","https://git.kernel.org/stable/c/2288b54b96dcb55bedebcef3572bb8821fc5e708","https://git.kernel.org/stable/c/584cd3ff792e1edbea20b2a7df55897159b0be3e","https://git.kernel.org/stable/c/e7e9c5b2dda29067332df2a85b0141a92b41f218","https://git.kernel.org/stable/c/3d2786d65aaa954ebd3fcc033ada433e10da21c4","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:56.516Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/49xxx/CVE-2024-49850.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-49850","state":"PUBLISHED","datePublished":"2024-10-21T12:18:44.098Z","dateUpdated":"2026-05-11T20:40:25.766Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-10-21T12:17:06.015Z"},"containers":{"cna":{"title":"bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos\n\nIn case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL\nreferencing a non-existing BTF type, function bpf_core_calc_relo_insn\nwould cause a null pointer deference.\n\nFix this by adding a proper check upper in call stack, as malformed\nrelocation records could be passed from user space.\n\nSimplest reproducer is a program:\n\n    r0 = 0\n    exit\n\nWith a single relocation record:\n\n    .insn_off = 0,          /* patch first instruction */\n    .type_id = 100500,      /* this type id does not exist */\n    .access_str_off = 6,    /* offset of string \"0\" */\n    .kind = BPF_CORE_TYPE_ID_LOCAL,\n\nSee the link for original reproducer or next commit for a test 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