{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72110","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-09T03:40:39.906Z","datePublished":"2026-08-15T05:52:51.805Z","dateUpdated":"2026-08-23T12:46:50.580Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-23T12:46:50.580Z"},"descriptions":[{"lang":"en","value":"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 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."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached via fork()/clone()/clone3() into copy_process() and free_task()->bpf_task_storage_free(); per kernel guidance BPF/fork paths are Local and no network-facing handler can drive this early-bailout teardown.\nAC:L - The attacker controls all conditions: dup_task_struct copies parent ->bpf_storage, then they can deterministically force early copy_process failure (setrlimit(RLIMIT_NPROC) plus fork, fork-until-EAGAIN, or nr_threads exhaustion) to hit bpf_local_storage_destroy on the copied pointer.\nPR:L - Exploitation needs only a local process already inserted into a BPF task storage map (sched_ext/tracing BPF on servers, or BPF loaded via user-namespace CAP_BPF/unprivileged BPF); fork itself needs no real-root capability, so PR:L per user-namespace guidance.\nUI:N - No victim action is required; the attacker triggers the failed fork on a process they run and control the bailout timing themselves.\nS:U - Impact is in-kernel UAF/heap corruption and denial of service on the parent task's BPF local storage; this is standard kernel memory corruption without VM, container, or IOMMU boundary crossing.\nC:H - Destroying the parent's live bpf_local_storage via the child's stale ->bpf_storage pointer is a use-after-free; freed bpf_local_storage/bpf_local_storage_elem objects can be reclaimed for arbitrary kernel memory disclosure per UAF guidance.\nI:H - bpf_local_storage_destroy() unlinks and frees parent storage still referenced by the live forking task, enabling heap grooming and attacker-controlled writes over freed BPF local storage structures for privilege escalation.\nA:H - The fix commit reports kernel hangs and UAF; tearing down active BPF task local storage during failed fork can oops, panic, or deadlock the system, satisfying High availability impact for kernel crashes/UAF."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/fork.c"],"versions":[{"version":"a10787e6d58c24b51e91c19c6d16c5da89fcaa4b","lessThan":"7df67a4799067a59e6a2d53f8059a6be6e73e678","status":"affected","versionType":"git"},{"version":"a10787e6d58c24b51e91c19c6d16c5da89fcaa4b","lessThan":"aff686efd38728e06daf12417a0d7ed454ce4cff","status":"affected","versionType":"git"},{"version":"a10787e6d58c24b51e91c19c6d16c5da89fcaa4b","lessThan":"c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74","status":"affected","versionType":"git"},{"version":"a10787e6d58c24b51e91c19c6d16c5da89fcaa4b","lessThan":"9cff220ddb65b022cc668bb652200742476e744c","status":"affected","versionType":"git"},{"version":"a10787e6d58c24b51e91c19c6d16c5da89fcaa4b","lessThan":"c4f626ddf2350652ad2f79daf1f10847f3f6eabd","status":"affected","versionType":"git"},{"version":"a10787e6d58c24b51e91c19c6d16c5da89fcaa4b","lessThan":"43f0005f81b8ce3be962d653cde8db9022f1e9b0","status":"affected","versionType":"git"},{"version":"a10787e6d58c24b51e91c19c6d16c5da89fcaa4b","lessThan":"9b51a6155d14389876916726430da30eabb1d4ed","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/fork.c"],"versions":[{"version":"5.13","status":"affected"},{"version":"0","lessThan":"5.13","status":"unaffected","versionType":"semver"},{"version":"5.15.217","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.184","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.40","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.5","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"5.15.217"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.184"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.2"}]}]}],"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"}],"title":"bpf,fork: wipe ->bpf_storage before bailouts that access it","x_generator":{"engine":"bippy-1.2.0"}}}}