{"api_version":"1","generated_at":"2026-07-23T13:27:06+00:00","cve":"CVE-2026-45865","urls":{"html":"https://cve.report/CVE-2026-45865","api":"https://cve.report/api/cve/CVE-2026-45865.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-45865","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45865"},"summary":{"title":"mctp i2c: initialise event handler read bytes","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmctp i2c: initialise event handler read bytes\n\nSet a 0xff value for i2c reads of an mctp-i2c device. Otherwise reads\nwill return \"val\" from the i2c bus driver. 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the Linux kernel, the following vulnerability has been resolved:\n\nmctp i2c: initialise event handler read bytes\n\nSet a 0xff value for i2c reads of an mctp-i2c device. Otherwise reads\nwill return \"val\" from the i2c bus driver. For i2c-aspeed and\ni2c-npcm7xx that is a stack uninitialised u8.\n\nTested with \"i2ctransfer -y 1 r10@0x34\" where 0x34 is a mctp-i2c\ninstance, now it returns all 0xff."}],"providerMetadata":{"dateUpdated":"2026-05-27T12:15:45.082Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/93e01e837e105299f1c259ef71f6e1ec4fe806e3"},{"url":"https://git.kernel.org/stable/c/11f83253244060b5de5eac787f61ae3f3e559d01"},{"url":"https://git.kernel.org/stable/c/fa9861e5c8af7651dddfa8d490aaada17ae33b6c"},{"url":"https://git.kernel.org/stable/c/6ff2ebfef75fbc57d937d8fbe738b967edf2d331"},{"url":"https://git.kernel.org/stable/c/1eeedb310229bfee9dd4d992e5bba33fe1378a8f"},{"url":"https://git.kernel.org/stable/c/2a14e91b6d76639dac70ea170f4384c1ee3cb48d"}],"title":"mctp i2c: initialise event handler read bytes","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-45865","datePublished":"2026-05-27T12:15:45.082Z","dateReserved":"2026-05-13T15:03:33.080Z","dateUpdated":"2026-05-27T12:15:45.082Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-27 14:16:58","lastModifiedDate":"2026-06-25 21:07:04","problem_types":["NVD-CWE-noinfo"],"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":"5.18","versionEndExcluding":"6.1.165","matchCriteriaId":"3B9A8D13-BEFF-47C0-956C-415602FDDAAF"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.128","matchCriteriaId":"851E9353-6C09-4CC9-877E-E09DB164A3C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.75","matchCriteriaId":"BCE16369-98ED-41CF-8995-DFDC10B288D2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.14","matchCriteriaId":"BF463CB7-1F58-4607-B847-77ED23E4B9B7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.4","matchCriteriaId":"672A3E79-EC03-479D-8503-361DFBDC8092"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"45865","Ordinal":"1","Title":"mctp i2c: initialise event handler read bytes","CVE":"CVE-2026-45865","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"45865","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmctp i2c: initialise event handler read bytes\n\nSet a 0xff value for i2c reads of an mctp-i2c device. Otherwise reads\nwill return \"val\" from the i2c bus driver. For i2c-aspeed and\ni2c-npcm7xx that is a stack uninitialised u8.\n\nTested with \"i2ctransfer -y 1 r10@0x34\" where 0x34 is a mctp-i2c\ninstance, now it returns all 0xff.","Type":"Description","Title":"mctp i2c: initialise event handler read bytes"}]}}}