| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethtool: netlink: Allow NULL nlattrs when getting a phy_device\n\nethnl_req_get_phydev() is used to lookup a phy_device, in the case an\nethtool netlink command targets a specific phydev within a netdev's\ntopology.\n\nIt takes as a parameter a const struct nlattr *header that's used for\nerror handling :\n\n if (!phydev) {\n NL_SET_ERR_MSG_ATTR(extack, header,\n \"no phy matching phyindex\");\n return ERR_PTR(-ENODEV);\n }\n\nIn the notify path after a ->set operation however, there's no request\nattributes available.\n\nThe typical callsite for the above function looks like:\n\n\tphydev = ethnl_req_get_phydev(req_base, tb[ETHTOOL_A_XXX_HEADER],\n\t\t\t\t info->extack);\n\nSo, when tb is NULL (such as in the ethnl notify path), we have a nice\ncrash.\n\nIt turns out that there's only the PLCA command that is in that case, as\nthe other phydev-specific commands don't have a notification.\n\nThis commit fixes the crash by passing the cmd index and the nlattr\narray separately, allowing NULL-checking it directly inside the helper." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/ethtool/cabletest.c", |
| "net/ethtool/linkstate.c", |
| "net/ethtool/netlink.c", |
| "net/ethtool/netlink.h", |
| "net/ethtool/phy.c", |
| "net/ethtool/plca.c", |
| "net/ethtool/pse-pd.c", |
| "net/ethtool/stats.c", |
| "net/ethtool/strset.c" |
| ], |
| "versions": [ |
| { |
| "version": "c15e065b46dc4e19837275b826c1960d55564abd", |
| "lessThan": "639c70352958735addbba5ae7dd65985da96e061", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "c15e065b46dc4e19837275b826c1960d55564abd", |
| "lessThan": "1f458fa42c29144cef280e05bc49fc21b873d897", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "c15e065b46dc4e19837275b826c1960d55564abd", |
| "lessThan": "637399bf7e77797811adf340090b561a8f9d1213", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/ethtool/cabletest.c", |
| "net/ethtool/linkstate.c", |
| "net/ethtool/netlink.c", |
| "net/ethtool/netlink.h", |
| "net/ethtool/phy.c", |
| "net/ethtool/plca.c", |
| "net/ethtool/pse-pd.c", |
| "net/ethtool/stats.c", |
| "net/ethtool/strset.c" |
| ], |
| "versions": [ |
| { |
| "version": "6.12", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "6.12", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.19", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.13.7", |
| "lessThanOrEqual": "6.13.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14", |
| "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": "6.12", |
| "versionEndExcluding": "6.12.19" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.12", |
| "versionEndExcluding": "6.13.7" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.12", |
| "versionEndExcluding": "6.14" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/639c70352958735addbba5ae7dd65985da96e061" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/1f458fa42c29144cef280e05bc49fc21b873d897" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/637399bf7e77797811adf340090b561a8f9d1213" |
| } |
| ], |
| "title": "net: ethtool: netlink: Allow NULL nlattrs when getting a phy_device", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-21921", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
