205 lines
9.8 KiB
JSON
205 lines
9.8 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-2026-23437",
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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": "2026-01-13T15:37:46.017Z",
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"datePublished": "2026-04-03T15:15:22.048Z",
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"dateUpdated": "2026-10-19T18:35:43.629Z"
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},
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:21:45.565Z"
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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: shaper: protect late read accesses to the hierarchy\n\nWe look up a netdev during prep of Netlink ops (pre- callbacks)\nand take a ref to it. Then later in the body of the callback\nwe take its lock or RCU which are the actual protections.\n\nThis is not proper, a conversion from a ref to a locked netdev\nmust include a liveness check (a check if the netdev hasn't been\nunregistered already). Fix the read cases (those under RCU).\nWrites needs a separate change to protect from creating the\nhierarchy after flush has already run."
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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 vulnerable code is reached through local Generic Netlink `net-shaper` requests, not by remote network packets.\nAC:L - This is a race, but a local attacker can repeatedly issue read requests while causing or waiting for netdevice teardown; the vulnerable window is directly exercised by concurrent Netlink/device-lifetime activity.\nPR:L - The affected `GET` and dump read paths do not require `GENL_ADMIN_PERM`; a basic local user can open a Generic Netlink socket and issue these requests.\nUI:N - No victim user action is required once the attacker can send the Netlink requests.\nS:U - The bug affects kernel networking state within the same kernel security authority and does not cross a VM, IOMMU, or comparable boundary.\nC:H - The bug is a use-after-free of the net shaper hierarchy/shaper objects, and freed kernel heap contents may be exposed or shaped into useful read primitives.\nI:H - Use-after-free of kernel heap objects is memory corruption and may be exploitable through heap reuse for control-flow or data corruption.\nA:H - The stale hierarchy pointer can be dereferenced after teardown, making kernel oops/panic or other denial of service likely."
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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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"net/shaper/shaper.c"
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],
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"versions": [
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{
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"version": "4b623f9f0f59652ea71fcb27d60b4c3b65126dbb",
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"lessThan": "581eee0890a8bde44f1fb78ad3e70502a897d583",
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"status": "affected",
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{
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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/shaper/shaper.c"
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],
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"versions": [
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{
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"version": "6.13",
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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": "6.13",
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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": "6.18.20",
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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": "6.19.10",
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"lessThanOrEqual": "6.19.*",
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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": "7.0",
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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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"versionStartIncluding": "6.13",
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"versionEndExcluding": "6.18.20"
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/581eee0890a8bde44f1fb78ad3e70502a897d583"
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},
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{
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"url": "https://git.kernel.org/stable/c/348758ba74e6a348299965b16a97cfb817545cc0"
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},
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{
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"url": "https://git.kernel.org/stable/c/0f9ea7141f365b4f27226898e62220fb98ef8dc6"
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}
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],
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"title": "net: shaper: protect late read accesses to the hierarchy",
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-23437",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:08:04.357382Z"
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}
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}
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}
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-662",
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"description": "CWE-662 Improper Synchronization"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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