{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53232", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.393Z", "datePublished": "2026-06-25T08:39:30.527Z", "dateUpdated": "2026-08-05T12:34:23.514Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:34:23.514Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: phy: clean the sfp upstream if phy probing fails\n\nSashiko reported that we don't call sfp_bus_del_upstream() in the probe\nfailure path, so let's add it, otherwise the sfp-bus is left with a\ndangling 'upstream' field, that may be used later on during SFP events.\n\nThis issue existed before the generic phylib sfp support, back when\ndrivers were calling phy_sfp_probe themselves." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The stale upstream pointer is dereferenced from SFP cage events such as module presence and LOS/link changes, which can be driven by a directly connected SFP link partner. It is not reachable through ordinary routed network packets or an unprivileged syscall path.\nAC:L - Once an affected PHY/SFP configuration has hit the failed-probe state, later SFP events reliably call the stale upstream callbacks. There is no attacker-won race or complex timing requirement in the event path.\nPR:N - An adjacent physical/link-layer attacker does not need kernel privileges or authentication to trigger SFP signal events. No CAP_NET_ADMIN or user-namespace route is required for that trigger path.\nUI:N - After the system is in the vulnerable failed-probe state, exploitation is triggered by SFP events without a victim user performing an action. The attacker can induce the relevant link/module event directly.\nS:U - The affected code and resulting impact are within the Linux kernel networking/PHY security authority. There is no VM, IOMMU, or separate-scope boundary crossing.\nC:H - The bug leaves a dangling `phy_device` upstream pointer that later SFP callbacks dereference, creating a kernel use-after-free style condition. Kernel UAF conditions are treated as capable of exposing arbitrary kernel memory.\nI:H - The stale pointer callbacks read and write fields through the freed or invalid `phy_device` and may reach attacker-influenced object contents after reuse. Kernel UAF memory corruption is treated as potentially enabling arbitrary write or code execution.\nA:H - Even without full exploitation, dereferencing the dangling upstream pointer during SFP events can crash or oops the kernel. Kernel crashes are high availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/phy/phy_device.c" ], "versions": [ { "version": "298e54fa810e027f1b0800d789eb862592721f08", "lessThan": "12fb84dc4dc8eb47ebe2b27f7de6255a4a205e1b", "status": "affected", "versionType": "git" }, { "version": "298e54fa810e027f1b0800d789eb862592721f08", "lessThan": "9326b654f90a09eadeb796c82801a5609d57f0c8", "status": "affected", "versionType": "git" }, { "version": "298e54fa810e027f1b0800d789eb862592721f08", "lessThan": "3a254779c169954fe23328a1db51f67be374f913", "status": "affected", "versionType": "git" }, { "version": "298e54fa810e027f1b0800d789eb862592721f08", "lessThan": "0b27701ce93161d7bbf4b25fa20ca59963b0e20c", "status": "affected", "versionType": "git" }, { "version": "298e54fa810e027f1b0800d789eb862592721f08", "lessThan": "48774e87bbaa0056819d4b52301e4692e50e3252", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/phy/phy_device.c" ], "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.94", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.143" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.94" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.36" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.0.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/12fb84dc4dc8eb47ebe2b27f7de6255a4a205e1b" }, { "url": "https://git.kernel.org/stable/c/9326b654f90a09eadeb796c82801a5609d57f0c8" }, { "url": "https://git.kernel.org/stable/c/3a254779c169954fe23328a1db51f67be374f913" }, { "url": "https://git.kernel.org/stable/c/0b27701ce93161d7bbf4b25fa20ca59963b0e20c" }, { "url": "https://git.kernel.org/stable/c/48774e87bbaa0056819d4b52301e4692e50e3252" } ], "title": "net: phy: clean the sfp upstream if phy probing fails", "x_generator": { "engine": "bippy-1.2.0" } } } }