{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45865", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.080Z", "datePublished": "2026-05-27T12:15:45.082Z", "dateUpdated": "2026-05-27T12:15:45.082Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:15:45.082Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/mctp/mctp-i2c.c"], "versions": [{"version": "f5b8abf9fc3dacd7529d363e26fe8230935d65f8", "lessThan": "93e01e837e105299f1c259ef71f6e1ec4fe806e3", "status": "affected", "versionType": "git"}, {"version": "f5b8abf9fc3dacd7529d363e26fe8230935d65f8", "lessThan": "11f83253244060b5de5eac787f61ae3f3e559d01", "status": "affected", "versionType": "git"}, {"version": "f5b8abf9fc3dacd7529d363e26fe8230935d65f8", "lessThan": "fa9861e5c8af7651dddfa8d490aaada17ae33b6c", "status": "affected", "versionType": "git"}, {"version": "f5b8abf9fc3dacd7529d363e26fe8230935d65f8", "lessThan": "6ff2ebfef75fbc57d937d8fbe738b967edf2d331", "status": "affected", "versionType": "git"}, {"version": "f5b8abf9fc3dacd7529d363e26fe8230935d65f8", "lessThan": "1eeedb310229bfee9dd4d992e5bba33fe1378a8f", "status": "affected", "versionType": "git"}, {"version": "f5b8abf9fc3dacd7529d363e26fe8230935d65f8", "lessThan": "2a14e91b6d76639dac70ea170f4384c1ee3cb48d", "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/mctp/mctp-i2c.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "5.18", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.0"}]}]}], "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"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-45865", "lastModified": "2026-05-27T14:48:31.480", "metrics": {}, "published": "2026-05-27T14:16:58.787", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/11f83253244060b5de5eac787f61ae3f3e559d01"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1eeedb310229bfee9dd4d992e5bba33fe1378a8f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2a14e91b6d76639dac70ea170f4384c1ee3cb48d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6ff2ebfef75fbc57d937d8fbe738b967edf2d331"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93e01e837e105299f1c259ef71f6e1ec4fe806e3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fa9861e5c8af7651dddfa8d490aaada17ae33b6c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{}