{"id":"CVE-2026-72110","summary":"bpf,fork: wipe -\u003ebpf_storage before bailouts that access it","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf,fork: wipe -\u003ebpf_storage before bailouts that access it\n\nCurrently, copy_process() can bail out to free_task() before p-\u003ebpf_storage\nhas been initialized, with this call graph (shown here for the\n!CONFIG_MEMCG case):\n\ncopy_process\n  dup_task_struct\n    arch_dup_task_struct\n      [copies the entire task_struct, including -\u003ebpf_storage member]\n  [RLIMIT_NPROC check fails]\n  delayed_free_task\n    free_task\n      bpf_task_storage_free\n        rcu_dereference(task-\u003ebpf_storage)\n        bpf_local_storage_destroy\n\nIn this case, the nascent task's -\u003ebpf_storage member that\nbpf_local_storage_destroy() operates on is a plain copy of the parent's\n-\u003ebpf_storage pointer, not a real initialized pointer.\nThis leads to badness (kernel hangs, UAF).\n\nThis is reachable as long as the process calling fork() has been inserted\ninto a task storage map.","modified":"2026-08-18T03:56:20.389007519Z","published":"2026-08-15T05:52:51.805Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72110.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/43f0005f81b8ce3be962d653cde8db9022f1e9b0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9b51a6155d14389876916726430da30eabb1d4ed"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9cff220ddb65b022cc668bb652200742476e744c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c4f626ddf2350652ad2f79daf1f10847f3f6eabd"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72110.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72110"},{"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":"a10787e6d58c24b51e91c19c6d16c5da89fcaa4b"},{"fixed":"c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74"},{"fixed":"9cff220ddb65b022cc668bb652200742476e744c"},{"fixed":"c4f626ddf2350652ad2f79daf1f10847f3f6eabd"},{"fixed":"43f0005f81b8ce3be962d653cde8db9022f1e9b0"},{"fixed":"9b51a6155d14389876916726430da30eabb1d4ed"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72110.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.13.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72110.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}