552 lines
25 KiB
JSON
552 lines
25 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-2022-48754",
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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": "2024-06-20T11:09:39.057Z",
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"datePublished": "2024-06-20T11:13:34.561Z",
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"dateUpdated": "2026-08-05T08:52:08.868Z"
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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": "2026-08-05T08:52:08.868Z"
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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\nphylib: fix potential use-after-free\n\nCommit bafbdd527d56 (\"phylib: Add device reset GPIO support\") added call\nto phy_device_reset(phydev) after the put_device() call in phy_detach().\n\nThe comment before the put_device() call says that the phydev might go\naway with put_device().\n\nFix potential use-after-free by calling phy_device_reset() before\nput_device()."
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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 path is phy_detach(), reached via local netdev admin (ndo_stop/ifdown → phy_disconnect) or local driver teardown/phylink/SFP paths, not via remotely received packets or protocols.\nAC:L - This is a use-after-free on a code path the attacker can invoke directly; when put_device drops the final reference (the case the surrounding comment and attach refcounting were written for), phy_device_reset() reliably touches freed phydev memory with no additional chance conditions.\nPR:L - Triggering requires CAP_NET_ADMIN to bring down or otherwise detach a PHY-backed interface, which is available to an unprivileged user via user namespaces/containers that have been given such a netdev, not only full init-namespace root.\nUI:N - No separate victim action is required; the attacker who can perform the netdev/driver operation triggers the bug themselves.\nS:U - Impact stays within the local kernel/host authority; this is a standard kernel UAF privilege-escalation class issue, not a VM/sandbox/IOMMU boundary escape.\nC:H - Use-after-free of struct phy_device lets an attacker reclaim and control the object contents, enabling arbitrary kernel read primitives via the subsequent reset_gpio/reset_ctrl use.\nI:H - The same UAF enables heap spraying and corruption of the freed phy_device so that mdio_device_reset()'s gpiod/reset_control calls become arbitrary write/control-flow primitives.\nA:H - Use-after-free of a kernel device object can cause kernel oops/panic even without full exploitation, so availability impact is high."
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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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"drivers/net/phy/phy_device.c"
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{
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"version": "0",
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"version": "5.16.5",
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"status": "unaffected",
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{
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"version": "5.17",
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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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"cpeApplicability": [
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"references": [
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"url": "https://git.kernel.org/stable/c/67d271760b037ce0806d687ee6057edc8afd4205"
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{
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}
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],
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"title": "phylib: fix potential use-after-free",
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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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{
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"type": "CWE",
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"cweId": "CWE-416",
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"lang": "en",
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"description": "CWE-416 Use After Free"
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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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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 8.4,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-25T15:12:03.815461Z",
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"id": "CVE-2022-48754",
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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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"role": "CISA Coordinator",
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"version": "2.0.3"
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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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"dateUpdated": "2024-06-25T15:26:05.300Z"
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}
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