317 lines
16 KiB
JSON
317 lines
16 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-2026-74305",
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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": "2026-08-15T05:44:03.882Z",
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"datePublished": "2026-08-15T05:58:06.654Z",
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"dateUpdated": "2026-10-16T18:55:31.883Z"
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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": "2026-08-17T05:45:39.394Z"
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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: Tighten cgroup storage cookie checks for prog arrays\n\nThe fix in commit abad3d0bad72 (\"bpf: Fix oob access in cgroup local\nstorage\") is still incomplete. The prog-array compatibility check\ntreats a program with no cgroup storage as compatible with any stored\nstorage cookie. This allows a storage-less program to bridge a tail\ncall chain between an entry program and a storage-using callee even\nthough cgroup local storage at runtime still follows the caller's\ncontext, that is, A -> B(no storage) -> C(storage) path.\n\nRequiring exact cookie equality would break the legitimate case of a\nstorage-less leaf program being tail called from a storage-using one.\nInstead, only accept a zero storage cookie if the program cannot\nperform tail calls itself. This keeps A -> B(no storage) working\nwhile rejecting the A -> B(no storage) -> C(storage) bridge."
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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 - Exploitation requires local bpf() syscalls to load cgroup BPF programs/maps, populate a prog array, attach or test-run them; per kernel guidance BPF/cgroup hooks are Local even when later triggered by sockets or packets.\nAC:L - The attacker fully controls crafting programs A/B/C, prog-array insertion order, and triggering the cgroup hook or BPF_PROG_TEST_RUN; no race or victim-dependent state is required to reach the mismatched-storage OOB path.\nPR:L - Reaching the buggy compatibility check needs only local BPF privileges (CAP_BPF or unprivileged BPF where enabled) plus cgroup attach/test-run access obtainable by unprivileged users in delegated cgroups or user namespaces, not init-namespace root.\nUI:N - The attacker loads, wires, and triggers the malicious BPF program chain itself (e.g., creating a socket or using BPF_PROG_TEST_RUN); no action by another user or administrator is required.\nS:U - The out-of-bounds cgroup local storage access corrupts kernel heap memory within the same kernel security domain and enables local privilege escalation, not a cross-boundary VM, IOMMU, or sandbox escape.\nC:H - Tail-called program C obtains a pointer from bpf_get_local_storage() backed by entry program A's smaller cgroup storage while verifier-approved helpers perform larger accesses, yielding controllable out-of-bounds kernel heap reads.\nI:H - The returned cgroup storage pointer is writable map memory, and size-mismatched helper copies (e.g., bpf_map_update_elem/copy_map_value_long) enable controllable out-of-bounds heap writes exploitable for kernel corruption and code execution.\nA:H - The heap out-of-bounds read/write can corrupt adjacent kernel objects and readily trigger kernel oops/panic or denial of service, as demonstrated by the cgroup_storage_oob selftest expecting KASAN reports without the fix."
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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/bpf/core.c"
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],
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"versions": [
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{
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"version": "c1c74584b9b4043c52e41fec415226e582d266a3",
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"lessThan": "87177497cca90bf4fcfb759eb898560eb5b46a10",
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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": "66da7cee78590259b400e51a70622ccd41da7bb2",
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"lessThan": "1c762d28698483ce7c372091f34d86e4d4828652",
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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": "7acfa07c585e3d7a64654d38f0a5c762877d0b9b",
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"lessThan": "eb73056ce2a6f101ddd3bdba89af6b24ebffff85",
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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": "41688d1fc5d163a6c2c0e95c0419e2cb31a44648",
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"lessThan": "9ca06849c4239aa2d580c54651f8588c51cb398b",
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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": "abad3d0bad72a52137e0c350c59542d75ae4f513",
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"lessThan": "46fbafe3d2d569d828e8d24a7dbe1659f63685cf",
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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": "abad3d0bad72a52137e0c350c59542d75ae4f513",
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"lessThan": "cb22dc79528eb26a46d346c3118dbd6b14c70609",
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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": "abad3d0bad72a52137e0c350c59542d75ae4f513",
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"lessThan": "10627ddc0167aab5c1c390a10ef461e9937aba08",
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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": "19341d5c59e8c7e8528e40f8663e99d67810473c",
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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": "5.15.192",
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"lessThan": "5.15.212",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.1.151",
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"lessThan": "6.1.178",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.6.105",
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"lessThan": "6.6.145",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.12.46",
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"lessThan": "6.12.97",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.16.1",
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"lessThan": "6.17",
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"status": "affected",
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"versionType": "semver"
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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/bpf/core.c"
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],
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"versions": [
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{
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"version": "6.17",
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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": "6.17",
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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": "5.15.212",
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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": "6.1.178",
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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": "5.15.192",
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"versionEndExcluding": "5.15.212"
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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": "6.1.151",
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"versionEndExcluding": "6.1.178"
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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": "6.6.105",
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"versionEndExcluding": "6.6.145"
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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": "6.12.46",
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"versionEndExcluding": "6.12.97"
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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": "6.17",
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"versionEndExcluding": "6.18.40"
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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": "6.17",
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"versionEndExcluding": "7.1.5"
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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": "6.17",
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"versionEndExcluding": "7.2"
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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": "6.16.1"
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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/87177497cca90bf4fcfb759eb898560eb5b46a10"
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},
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{
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"url": "https://git.kernel.org/stable/c/1c762d28698483ce7c372091f34d86e4d4828652"
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},
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{
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"url": "https://git.kernel.org/stable/c/eb73056ce2a6f101ddd3bdba89af6b24ebffff85"
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},
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{
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"url": "https://git.kernel.org/stable/c/9ca06849c4239aa2d580c54651f8588c51cb398b"
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},
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{
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"url": "https://git.kernel.org/stable/c/46fbafe3d2d569d828e8d24a7dbe1659f63685cf"
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},
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{
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"url": "https://git.kernel.org/stable/c/cb22dc79528eb26a46d346c3118dbd6b14c70609"
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},
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{
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"url": "https://git.kernel.org/stable/c/10627ddc0167aab5c1c390a10ef461e9937aba08"
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}
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],
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"title": "bpf: Tighten cgroup storage cookie checks for prog arrays",
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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-2026-74305",
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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": "2026-10-16T18:52:53.092866Z"
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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": "2026-10-16T18:55:31.883Z"
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}
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}
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]
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}
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} |