{"id":"CVE-2026-72110","title":"bpf,fork: wipe ->bpf_storage before bailouts that access it","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf,fork: wipe ->bpf_storage before bailouts that access it\n\nCurrently, copy_process() can bail out to free_task() before p->bpf_storage\nhas been initialized, with this…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < 7df67a4799067a59e6a2d53f8059a6be6e73e678","Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < aff686efd38728e06daf12417a0d7ed454ce4cff","Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74","Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < 9cff220ddb65b022cc668bb652200742476e744c","Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < c4f626ddf2350652ad2f79daf1f10847f3f6eabd","Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < 43f0005f81b8ce3be962d653cde8db9022f1e9b0","Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < 9b51a6155d14389876916726430da30eabb1d4ed","Linux 5.13"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:41:35.831908Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:44:56.143Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72110","references":[{"url":"https://git.kernel.org/stable/c/7df67a4799067a59e6a2d53f8059a6be6e73e678"},{"url":"https://git.kernel.org/stable/c/aff686efd38728e06daf12417a0d7ed454ce4cff"},{"url":"https://git.kernel.org/stable/c/c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74"},{"url":"https://git.kernel.org/stable/c/9cff220ddb65b022cc668bb652200742476e744c"},{"url":"https://git.kernel.org/stable/c/c4f626ddf2350652ad2f79daf1f10847f3f6eabd"},{"url":"https://git.kernel.org/stable/c/43f0005f81b8ce3be962d653cde8db9022f1e9b0"},{"url":"https://git.kernel.org/stable/c/9b51a6155d14389876916726430da30eabb1d4ed"}],"tags":["cve.org"],"epss":0.00169,"epssPercentile":0.05786,"ingestedAt":"2026-10-16T19:46:24.433Z","slug":"CVE-2026-72110","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf,fork: wipe ->bpf_storage before bailouts that access it\n\nCurrently, copy_process() can bail out to free_task() before p->bpf_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 ->bpf_storage member]\n  [RLIMIT_NPROC check fails]\n  delayed_free_task\n    free_task\n      bpf_task_storage_free\n        rcu_dereference(task->bpf_storage)\n        bpf_local_storage_destroy\n\nIn this case, the nascent task's ->bpf_storage member that\nbpf_local_storage_destroy() operates on is a plain copy of the parent's\n->bpf_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.\n\n## Affected\n\n- `Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < 7df67a4799067a59e6a2d53f8059a6be6e73e678`\n- `Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < aff686efd38728e06daf12417a0d7ed454ce4cff`\n- `Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74`\n- `Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < 9cff220ddb65b022cc668bb652200742476e744c`\n- `Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < c4f626ddf2350652ad2f79daf1f10847f3f6eabd`\n- `Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < 43f0005f81b8ce3be962d653cde8db9022f1e9b0`\n- `Linux >= a10787e6d58c24b51e91c19c6d16c5da89fcaa4b < 9b51a6155d14389876916726430da30eabb1d4ed`\n- `Linux 5.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}