248 lines
13 KiB
JSON
248 lines
13 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-2025-68245",
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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": "2025-12-16T13:41:40.264Z",
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"datePublished": "2025-12-16T14:21:22.348Z",
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"dateUpdated": "2026-05-11T21:49:38.460Z"
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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": "2026-05-11T21:49:38.460Z"
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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\nnet: netpoll: fix incorrect refcount handling causing incorrect cleanup\n\ncommit efa95b01da18 (\"netpoll: fix use after free\") incorrectly\nignored the refcount and prematurely set dev->npinfo to NULL during\nnetpoll cleanup, leading to improper behavior and memory leaks.\n\nScenario causing lack of proper cleanup:\n\n1) A netpoll is associated with a NIC (e.g., eth0) and netdev->npinfo is\n allocated, and refcnt = 1\n - Keep in mind that npinfo is shared among all netpoll instances. In\n this case, there is just one.\n\n2) Another netpoll is also associated with the same NIC and\n npinfo->refcnt += 1.\n - Now dev->npinfo->refcnt = 2;\n - There is just one npinfo associated to the netdev.\n\n3) When the first netpolls goes to clean up:\n - The first cleanup succeeds and clears np->dev->npinfo, ignoring\n refcnt.\n - It basically calls `RCU_INIT_POINTER(np->dev->npinfo, NULL);`\n - Set dev->npinfo = NULL, without proper cleanup\n - No ->ndo_netpoll_cleanup() is either called\n\n4) Now the second target tries to clean up\n - The second cleanup fails because np->dev->npinfo is already NULL.\n * In this case, ops->ndo_netpoll_cleanup() was never called, and\n the skb pool is not cleaned as well (for the second netpoll\n instance)\n - This leaks npinfo and skbpool skbs, which is clearly reported by\n kmemleak.\n\nRevert commit efa95b01da18 (\"netpoll: fix use after free\") and adds\nclarifying comments emphasizing that npinfo cleanup should only happen\nonce the refcount reaches zero, ensuring stable and correct netpoll\nbehavior."
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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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"net/core/netpoll.c"
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],
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"versions": [
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{
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"version": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
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"lessThan": "8e6a50edad11e3e1426e4c29e7aa6201f3468ac2",
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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": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
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"lessThan": "9b0bb18b4b9dc017c1825a2c5e763615e34a1593",
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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": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
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"lessThan": "890472d6fbf062e6de7fdd56642cb305ab79d669",
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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": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
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"lessThan": "4afd4ebbad52aa146838ec23082ba393e426a2bb",
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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": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
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"lessThan": "c645693180a98606c430825223d2029315d85e9d",
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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": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
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"lessThan": "c79a6d9da29219616b118a3adce9a14cd30f9bd0",
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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": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
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"lessThan": "9a51b5ccd1c79afec1c03a4e1e6688da52597556",
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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": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
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"lessThan": "49c8d2c1f94cc2f4d1a108530d7ba52614b874c2",
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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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"net/core/netpoll.c"
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],
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"versions": [
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{
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"version": "3.17",
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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": "3.17",
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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": "5.4.302",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.247",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.197",
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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": "6.1.159",
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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": "6.6.117",
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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": "6.12.59",
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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": "6.17.9",
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"lessThanOrEqual": "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": "6.18",
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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": "3.17",
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"versionEndExcluding": "5.4.302"
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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": "3.17",
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"versionEndExcluding": "5.10.247"
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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": "3.17",
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"versionEndExcluding": "5.15.197"
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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": "3.17",
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"versionEndExcluding": "6.1.159"
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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": "3.17",
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"versionEndExcluding": "6.6.117"
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},
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{
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.12.59"
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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": "3.17",
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"versionEndExcluding": "6.17.9"
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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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}
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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/8e6a50edad11e3e1426e4c29e7aa6201f3468ac2"
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},
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{
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"url": "https://git.kernel.org/stable/c/9b0bb18b4b9dc017c1825a2c5e763615e34a1593"
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},
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{
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"url": "https://git.kernel.org/stable/c/890472d6fbf062e6de7fdd56642cb305ab79d669"
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},
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{
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"url": "https://git.kernel.org/stable/c/4afd4ebbad52aa146838ec23082ba393e426a2bb"
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},
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{
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"url": "https://git.kernel.org/stable/c/c645693180a98606c430825223d2029315d85e9d"
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},
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{
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"url": "https://git.kernel.org/stable/c/c79a6d9da29219616b118a3adce9a14cd30f9bd0"
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},
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{
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"url": "https://git.kernel.org/stable/c/9a51b5ccd1c79afec1c03a4e1e6688da52597556"
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},
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{
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"url": "https://git.kernel.org/stable/c/49c8d2c1f94cc2f4d1a108530d7ba52614b874c2"
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}
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],
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"title": "net: netpoll: fix incorrect refcount handling causing incorrect cleanup",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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} |