{"api_version":"1","generated_at":"2026-05-13T18:03:24+00:00","cve":"CVE-2026-31736","urls":{"html":"https://cve.report/CVE-2026-31736","api":"https://cve.report/api/cve/CVE-2026-31736.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31736","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31736"},"summary":{"title":"net: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled\n\nIf the gmac0 is disabled, the precheck for a valid ingress device will\ncause a NULL pointer deref and crash the system. This happens because\neth->netdev[0] will be NULL but the code will directly try to access\nnetdev_ops.\n\nInstead of just checking for the first net_device, it must be checked if\nany of the mtk_eth net_devices is matching the netdev_ops of the ingress\ndevice.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-01 15:16:36","updated_at":"2026-05-07 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Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31736","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 73cfd947dbdb25ef9863ac49c4596a7d53ad4025 0b832aad33e6f160fda310f0306a6483d85e9d6e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 73cfd947dbdb25ef9863ac49c4596a7d53ad4025 5dff799c677152dde963c3917bacd9127b03e145 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 73cfd947dbdb25ef9863ac49c4596a7d53ad4025 7b2380f0a0e374010c1a4a13203511b9dee5b166 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 73cfd947dbdb25ef9863ac49c4596a7d53ad4025 976ff48c2ac6e6b25b01428c9d7997bcd0fb2949 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled\n\nIf the gmac0 is disabled, the precheck for a valid ingress device will\ncause a NULL pointer deref and crash the system. This happens because\neth->netdev[0] will be NULL but the code will directly try to access\nnetdev_ops.\n\nInstead of just checking for the first net_device, it must be checked if\nany of the mtk_eth net_devices is matching the netdev_ops of the ingress\ndevice."}],"providerMetadata":{"dateUpdated":"2026-05-01T14:14:33.583Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0b832aad33e6f160fda310f0306a6483d85e9d6e"},{"url":"https://git.kernel.org/stable/c/5dff799c677152dde963c3917bacd9127b03e145"},{"url":"https://git.kernel.org/stable/c/7b2380f0a0e374010c1a4a13203511b9dee5b166"},{"url":"https://git.kernel.org/stable/c/976ff48c2ac6e6b25b01428c9d7997bcd0fb2949"}],"title":"net: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31736","datePublished":"2026-05-01T14:14:33.583Z","dateReserved":"2026-03-09T15:48:24.137Z","dateUpdated":"2026-05-01T14:14:33.583Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-01 15:16:36","lastModifiedDate":"2026-05-07 16:53:14","problem_types":["CWE-476"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.12.81","matchCriteriaId":"41664AAE-F159-4875-BF5B-B86E659ADB8A"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.22","matchCriteriaId":"C9DF8BCE-36D3-475D-9D21-19E4F02F9029"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.12","matchCriteriaId":"0A2B9540-02D5-41B4-B16A-82AF66FD4F36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*","matchCriteriaId":"F253B622-8837-4245-BCE5-A7BF8FC76A16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*","matchCriteriaId":"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*","matchCriteriaId":"F666C8D8-6538-46D4-B318-87610DE64C34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*","matchCriteriaId":"02259FDA-961B-47BC-AE7F-93D7EC6E90C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*","matchCriteriaId":"58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*","matchCriteriaId":"1D2315C0-D46F-4F85-9754-F9E5E11374A6"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31736","Ordinal":"1","Title":"net: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled","CVE":"CVE-2026-31736","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31736","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled\n\nIf the gmac0 is disabled, the precheck for a valid ingress device will\ncause a NULL pointer deref and crash the system. This happens because\neth->netdev[0] will be NULL but the code will directly try to access\nnetdev_ops.\n\nInstead of just checking for the first net_device, it must be checked if\nany of the mtk_eth net_devices is matching the netdev_ops of the ingress\ndevice.","Type":"Description","Title":"net: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled"}]}}}