277 lines
15 KiB
JSON
277 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-72110",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-09T03:40:39.906Z",
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"datePublished": "2026-08-15T05:52:51.805Z",
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"dateUpdated": "2026-10-16T18:44:56.143Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-23T12:46:50.580Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"kernel/fork.c"
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],
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"versions": [
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{
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"version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
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"lessThan": "7df67a4799067a59e6a2d53f8059a6be6e73e678",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
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"lessThan": "aff686efd38728e06daf12417a0d7ed454ce4cff",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
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"lessThan": "c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
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"lessThan": "9cff220ddb65b022cc668bb652200742476e744c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
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"lessThan": "c4f626ddf2350652ad2f79daf1f10847f3f6eabd",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
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"lessThan": "43f0005f81b8ce3be962d653cde8db9022f1e9b0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
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"lessThan": "9b51a6155d14389876916726430da30eabb1d4ed",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"kernel/fork.c"
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],
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"versions": [
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{
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"version": "5.13",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.13",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.217",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.184",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.145",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.97",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.40",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "5.15.217"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "6.1.184"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "6.12.97"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "7.2"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/7df67a4799067a59e6a2d53f8059a6be6e73e678"
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},
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{
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"url": "https://git.kernel.org/stable/c/aff686efd38728e06daf12417a0d7ed454ce4cff"
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},
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{
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"url": "https://git.kernel.org/stable/c/c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74"
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},
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{
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"url": "https://git.kernel.org/stable/c/9cff220ddb65b022cc668bb652200742476e744c"
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},
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{
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"url": "https://git.kernel.org/stable/c/c4f626ddf2350652ad2f79daf1f10847f3f6eabd"
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},
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{
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"url": "https://git.kernel.org/stable/c/43f0005f81b8ce3be962d653cde8db9022f1e9b0"
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},
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{
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"url": "https://git.kernel.org/stable/c/9b51a6155d14389876916726430da30eabb1d4ed"
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}
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],
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"title": "bpf,fork: wipe ->bpf_storage before bailouts that access it",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-72110",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T18:41:35.831908Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T18:44:56.143Z"
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}
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}
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]
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}
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} |