226 lines
12 KiB
JSON
226 lines
12 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-2026-80992",
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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": "2026-08-26T14:34:25.811Z",
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"datePublished": "2026-09-11T19:42:48.855Z",
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"dateUpdated": "2026-10-19T08:46:16.688Z"
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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": "2026-10-19T08:46:16.688Z"
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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: ravb: avoid dereferencing an invalid PTP clock\n\nThe PTP clock is unavailable before the first open, so querying its\nindex can dereference a NULL pointer. Registration failures can also\nleave an error pointer in priv->ptp.clock.\n\nCache the PHC index separately and report -1 while no clock is\nregistered. Normalize registration errors to NULL and preserve the\nstatic timestamping capabilities."
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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 - ravb_get_ts_info() is reached only via local SIOCETHTOOL ETHTOOL_GET_TS_INFO, ethtool netlink TSINFO_GET, SO_TIMESTAMPING BIND_PHC, or taprio setup on the ravb netdev. Received Ethernet/PTP packets never enter this path.\nAC:L - ethtool timestamp-info on a never-opened ravb interface deterministically calls ptp_clock_index(NULL), and after a normal open/close ravb_ptp_stop() leaves a dangling priv->ptp.clock that the same query dereferences. The attacker does not need a race or a rare config.\nPR:L - ETHTOOL_GET_TS_INFO is on the ethtool ioctl allow-list that skips CAP_NET_ADMIN, and ETHTOOL_MSG_TSINFO_GET has no GENL admin flag, so an unprivileged local user can trigger it. Interface cycling is privileged, but the down/never-opened state exists after normal system management.\nUI:N - The attacker issues the ethtool ioctl/netlink query (or SO_TIMESTAMPING BIND_PHC) directly against the existing ravb netdev. No separate victim action is required.\nS:U - The defect is in the ravb kernel Ethernet/PTP driver and impacts the same kernel. It is not a guest-to-host, IOMMU, or other cross-authority boundary bypass.\nC:H - After ndo_stop, ravb_ptp_stop() unregisters and kfree's struct ptp_clock via ptp_clock_release() but leaves priv->ptp.clock set, so a later ptp_clock_index() is a kernel heap UAF read. Kernel scoring treats UAFs as high confidentiality because freed-object reuse can yield disclosure primitives.\nI:H - The get_ts_info hit is a stale read of ptp_clock.index, but after close the object is a freed heap ptp_clock. Kernel scoring treats that UAF as high integrity impact because heap reuse can be leveraged toward write or control-flow primitives.\nA:H - Before first open, ptp_clock_index(NULL) oopses; a failed ptp_clock_register() leaves an ERR_PTR that is also dereferenced; and the post-close dangling pointer is a UAF that can panic. Any of these kernel crashes is high availability impact."
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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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"drivers/net/ethernet/renesas/ravb.h",
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"drivers/net/ethernet/renesas/ravb_main.c",
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"drivers/net/ethernet/renesas/ravb_ptp.c"
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],
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"versions": [
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{
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"version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
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"lessThan": "29ffd972531f8e6e0edf4ea3496190acff9fc9c2",
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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": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
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"lessThan": "bf3308416a2be85dcc9965b614a745b40beeff14",
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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": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
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"lessThan": "fc710f89a644e030a7ca15343176ca862fd61b9d",
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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": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
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"lessThan": "8d4d06d6e2b501cb8e30ed3b1924c470358e8052",
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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": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
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"lessThan": "0aaa53936419cf0c19c670387fc6d431e042a1b6",
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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": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
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"lessThan": "1f77af0aaf277413ff32f6ff8c2c4282bd64c897",
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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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"drivers/net/ethernet/renesas/ravb.h",
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"drivers/net/ethernet/renesas/ravb_main.c",
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"drivers/net/ethernet/renesas/ravb_ptp.c"
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],
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"versions": [
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{
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"version": "4.2",
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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": "4.2",
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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": "6.1.188",
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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": "6.6.157",
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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": "6.12.109",
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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": "6.18.50",
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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": "4.2",
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"versionEndExcluding": "6.1.188"
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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": "4.2",
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"versionEndExcluding": "6.6.157"
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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": "4.2",
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"versionEndExcluding": "6.12.109"
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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": "4.2",
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"versionEndExcluding": "6.18.50"
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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": "4.2",
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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": "4.2",
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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/29ffd972531f8e6e0edf4ea3496190acff9fc9c2"
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},
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{
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"url": "https://git.kernel.org/stable/c/bf3308416a2be85dcc9965b614a745b40beeff14"
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},
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{
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"url": "https://git.kernel.org/stable/c/fc710f89a644e030a7ca15343176ca862fd61b9d"
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},
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{
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"url": "https://git.kernel.org/stable/c/8d4d06d6e2b501cb8e30ed3b1924c470358e8052"
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},
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{
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"url": "https://git.kernel.org/stable/c/0aaa53936419cf0c19c670387fc6d431e042a1b6"
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},
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{
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"url": "https://git.kernel.org/stable/c/1f77af0aaf277413ff32f6ff8c2c4282bd64c897"
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}
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],
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"title": "net: ravb: avoid dereferencing an invalid PTP clock",
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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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} |