159 lines
8.0 KiB
JSON
159 lines
8.0 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-2026-64261",
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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": "2026-07-19T15:36:31.774Z",
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"datePublished": "2026-07-25T08:49:11.999Z",
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"dateUpdated": "2026-08-17T04:52:14.647Z"
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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": "2026-08-17T04:52:14.647Z"
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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\nfuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues\n\nfuse_uring_async_stop_queues() might run when the last reference\non ring->queue_refs was already dropped.\n\nIn order to avoid an early destruction a reference on struct fuse_conn\nis now taken before starting fuse_uring_async_stop_queues() and that\nreference is only released when that delayed work queue terminates."
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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 vulnerability is reached locally through IORING_OP_URING_CMD on a FUSE or CUSE device and connection teardown; no network path invokes it.\nAC:L - The attacker controls ring-entry creation or cancellation and closing the final channel, allowing both sides of the race to be driven and retried.\nPR:L - The vulnerable io_uring handler has no capability check, and a basic user can access a delegated FUSE/CUSE device; FUSE also supports unprivileged user-namespace mounts.\nUI:N - The attacker can create the connection, issue concurrent io_uring operations, and initiate teardown without any separate victim action.\nS:U - Exploitation compromises the same host kernel security authority; this is standard local kernel privilege escalation rather than a VM or IOMMU boundary escape.\nC:H - The stale delayed worker accesses reclaimed kmalloc-192 ring, queue, and list objects, allowing heap replacement to turn the UAF into kernel-memory disclosure primitives.\nI:H - The worker performs list and synchronization operations through freed, reclaimable pointers, making arbitrary writes or control-flow hijacking and kernel code execution defensible.\nA:H - The bug has produced a KASAN slab-use-after-free in asynchronous queue teardown and can cause a kernel oops, panic, or unrecoverable list corruption."
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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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"fs/fuse/dev_uring.c"
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],
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"versions": [
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{
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"version": "4a9bfb9b6850fec0685447aed280533cf980de70",
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"lessThan": "23a356e0bd96c8d5fb3ddff069f692bf10cab5c1",
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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": "4a9bfb9b6850fec0685447aed280533cf980de70",
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"lessThan": "95d7f50aff2a5f71557263ff25b97b2951f32bf8",
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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": "4a9bfb9b6850fec0685447aed280533cf980de70",
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"lessThan": "d351da75066955144515cb2f9aa959f24a04287a",
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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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"fs/fuse/dev_uring.c"
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],
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"versions": [
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{
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"version": "6.14",
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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": "6.14",
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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": "6.18.39",
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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": "7.1.4",
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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": "6.14",
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"versionEndExcluding": "6.18.39"
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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": "6.14",
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"versionEndExcluding": "7.1.4"
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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": "6.14",
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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/23a356e0bd96c8d5fb3ddff069f692bf10cab5c1"
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},
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{
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"url": "https://git.kernel.org/stable/c/95d7f50aff2a5f71557263ff25b97b2951f32bf8"
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},
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{
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"url": "https://git.kernel.org/stable/c/d351da75066955144515cb2f9aa959f24a04287a"
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}
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],
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"title": "fuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues",
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"x_generator": {
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} |