The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.
[
{
"id": "CVE-2016-6198-0142c5ca",
"target": {
"function": "vfs_rename",
"file": "fs/namei.c"
},
"signature_version": "v1",
"signature_type": "Function",
"deprecated": false,
"digest": {
"length": 2710.0,
"function_hash": "176251676786224064157905206971745351168"
},
"source": "https://github.com/torvalds/linux/commit/9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca"
},
{
"id": "CVE-2016-6198-16d61762",
"target": {
"file": "include/linux/dcache.h"
},
"signature_version": "v1",
"signature_type": "Line",
"deprecated": false,
"digest": {
"line_hashes": [
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],
"threshold": 0.9
},
"source": "https://github.com/torvalds/linux/commit/54d5ca871e72f2bb172ec9323497f01cd5091ec7"
},
{
"id": "CVE-2016-6198-917f3c4c",
"target": {
"file": "fs/namei.c"
},
"signature_version": "v1",
"signature_type": "Line",
"deprecated": false,
"digest": {
"line_hashes": [
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},
"source": "https://github.com/torvalds/linux/commit/9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca"
},
{
"id": "CVE-2016-6198-eb1ca7f6",
"target": {
"file": "fs/open.c"
},
"signature_version": "v1",
"signature_type": "Line",
"deprecated": false,
"digest": {
"line_hashes": [
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"threshold": 0.9
},
"source": "https://github.com/torvalds/linux/commit/54d5ca871e72f2bb172ec9323497f01cd5091ec7"
},
{
"id": "CVE-2016-6198-fe57db5e",
"target": {
"function": "vfs_open",
"file": "fs/open.c"
},
"signature_version": "v1",
"signature_type": "Function",
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"digest": {
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}
]