356 lines
17 KiB
JSON
356 lines
17 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-2022-48742",
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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": "2024-06-20T11:09:39.054Z",
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"datePublished": "2024-06-20T11:13:26.653Z",
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"dateUpdated": "2026-08-05T08:52:04.588Z"
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},
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},
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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\nrtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()\n\nWhile looking at one unrelated syzbot bug, I found the replay logic\nin __rtnl_newlink() to potentially trigger use-after-free.\n\nIt is better to clear master_dev and m_ops inside the loop,\nin case we have to replay it."
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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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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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{
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"lang": "en",
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"value": "AV:L - Triggered via RTM_NEWLINK on a local netlink/rtnetlink socket (syscall), not by remote packet processing.\nAC:L - An attacker who can issue concurrent RTM_NEWLINK operations controls both sides of the module-load unlock/replay window; CONFIG_MODULES is common and no external victim state is required.\nPR:L - RTM_NEWLINK requires CAP_NET_ADMIN checked via netlink_net_capable() against the socket netns user_ns, which an unprivileged process can obtain with user+net namespaces (unshare -Urn).\nUI:N - Exploitation needs no victim action beyond the attacker’s own netlink requests.\nS:U - Impact is privilege escalation within the same kernel authority; this is not a VM/IOMMU/sandbox boundary cross.\nC:H - Stale m_ops is a use-after-free on link-ops/module memory, which can be leveraged for arbitrary kernel reads.\nI:H - UAF of m_ops can divert control through stale function pointers (e.g. slave_changelink), enabling corruption and code execution.\nA:H - Use-after-free of master link ops reliably causes kernel oops/panic even when not fully turned into code execution."
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}
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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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} |