143 lines
7.2 KiB
JSON
143 lines
7.2 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-2026-80946",
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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": "2026-08-26T14:34:25.803Z",
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"datePublished": "2026-09-11T19:42:17.576Z",
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"dateUpdated": "2026-10-19T08:45:30.291Z"
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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": "2026-10-19T08:45:30.291Z"
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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: copy request headers via a stack buffer for io-uring\n\nThe fuse-io-uring transport copies req->in.h out to the ring in\nfuse_uring_copy_to_ring() and req->out.h back in fuse_uring_commit().\nBoth headers live inside the fuse_request slab object, whose cache\n(fuse_req_cachep) is created without a usercopy whitelist, so copying\nthem directly to/from userspace trips CONFIG_HARDENED_USERCOPY and\npanics:\n\n usercopy: Kernel memory exposure attempt detected from SLUB object\n 'fuse_request' (offset 56, size 40)!\n kernel BUG at mm/usercopy.c:102!\n Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\n RIP: 0010:usercopy_abort (mm/usercopy.c:90)\n Call Trace:\n __check_heap_object (mm/slub.c:8268)\n __check_object_size (mm/usercopy.c:197 mm/usercopy.c:258 mm/usercopy.c:223)\n copy_header_to_ring (fs/fuse/dev_uring.c:618)\n fuse_uring_prepare_send (fs/fuse/dev_uring.c:776 fs/fuse/dev_uring.c:785)\n fuse_uring_send_in_task (fs/fuse/dev_uring.c:1306)\n tctx_task_work_run (io_uring/tw.c:96)\n task_work_run (kernel/task_work.c:233)\n io_run_task_work (io_uring/tw.h:84)\n io_cqring_wait (io_uring/wait.c:278)\n __do_sys_io_uring_enter (io_uring/io_uring.c:2685)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n\nBounce both headers through an on-stack copy so the usercopy touches\nstack memory, not the slab object."
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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": "c090c8abae4b6b77a1bee116aa6c385456ebef96",
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"lessThan": "194d0fb0ea4720535ff3168c9d04c7632cec7071",
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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": "c090c8abae4b6b77a1bee116aa6c385456ebef96",
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"lessThan": "a47a416ff68d706dc3327ab583f86b9ee757358b",
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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": "c090c8abae4b6b77a1bee116aa6c385456ebef96",
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"lessThan": "fd10f40af314f07b6d6e028b1ca25c8b49903aab",
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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": "6.18.51",
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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": "7.2.4",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "6.18.51"
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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": "7.2.4"
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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": "7.3"
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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/194d0fb0ea4720535ff3168c9d04c7632cec7071"
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},
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{
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"url": "https://git.kernel.org/stable/c/a47a416ff68d706dc3327ab583f86b9ee757358b"
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},
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{
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"url": "https://git.kernel.org/stable/c/fd10f40af314f07b6d6e028b1ca25c8b49903aab"
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}
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],
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"title": "fuse: copy request headers via a stack buffer for io-uring",
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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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}
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} |