143 lines
7.6 KiB
JSON
143 lines
7.6 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-2026-98563",
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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": "2026-09-25T10:25:14.357Z",
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"datePublished": "2026-10-18T15:18:30.158Z",
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"dateUpdated": "2026-10-19T09:21:47.748Z"
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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": "2026-10-19T09:21:47.748Z"
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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: phylink: record the PHY only once bringup cannot fail\n\nphylink_bringup_phy() stores the PHY in pl->phydev before its last\nfallible step: on a MAC whose phylink ops implement LPI,\nphy_eee_rx_clock_stop() can fail with a real MDIO error. The callers\nunwind with phy_detach(), which knows nothing about pl->phydev, so a\npointer to a PHY that is no longer attached outlives the failed\nconnect.\n\nWhat that costs depends on how the caller got here.\nphylink_connect_phy() goes through phylink_attach_phy(), which refuses\nto attach while pl->phydev is set, turning a transient MDIO error into\na permanent -EBUSY. The SFP path is worse than that: sfp_sm_probe_phy()\nanswers the failure with phy_device_remove() and phy_device_free(), and\nit assigns sfp->mod_phy only past that error return, so nothing clears\npl->phydev and it is left pointing at a freed phy_device that\nphylink_resolve() and the ethtool helpers go on reading.\nphylink_fwnode_phy_connect() has no such check, so a later connect\noverwrites the stale pointer and hides the problem. A disconnect does\nnot: phylink_disconnect_phy() hands that pointer to phy_disconnect(),\nand the second phy_detach() on the same PHY drops references the first\none already released.\n\nFound while making a DSA port survive a PHY whose driver arrives after\nthe switch probes: keeping the port across a failed connect and\nretrying is what makes this window reachable.\n\nPublish the pointer after the last call that can fail instead of\nunwinding it afterwards. Nothing between the two points reads\npl->phydev, and the registration that follows cannot fail:\nphy_request_interrupt() falls back to polling on its own. The PHY-side\nstate keeps the order it had, so no MDIO operation moves relative to\nanother."
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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/phy/phylink.c"
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],
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"versions": [
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{
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"version": "03abf2a7c65451e663b078b0ed1bfa648cd9380f",
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"lessThan": "4e7a4af364c2048bafb213bf0ef4a89dcbe1bfd4",
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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": "03abf2a7c65451e663b078b0ed1bfa648cd9380f",
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"lessThan": "671a68654a9d319d7f0d53a6321db3d9b391bdef",
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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": "03abf2a7c65451e663b078b0ed1bfa648cd9380f",
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"lessThan": "a940003f44e7e441c228151dd212642152700ec8",
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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/phy/phylink.c"
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],
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"versions": [
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{
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"version": "6.14",
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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": "6.14",
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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": "6.18.55",
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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": "7.2.9",
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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": "6.14",
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"versionEndExcluding": "6.18.55"
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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": "6.14",
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"versionEndExcluding": "7.2.9"
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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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"versionStartIncluding": "6.14",
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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/4e7a4af364c2048bafb213bf0ef4a89dcbe1bfd4"
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},
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{
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"url": "https://git.kernel.org/stable/c/671a68654a9d319d7f0d53a6321db3d9b391bdef"
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},
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{
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"url": "https://git.kernel.org/stable/c/a940003f44e7e441c228151dd212642152700ec8"
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}
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],
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"title": "net: phylink: record the PHY only once bringup cannot fail",
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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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} |