{"api_version":"1","generated_at":"2026-07-24T21:50:53+00:00","cve":"CVE-2026-64236","urls":{"html":"https://cve.report/CVE-2026-64236","api":"https://cve.report/api/cve/CVE-2026-64236.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64236","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64236"},"summary":{"title":"i2c: davinci: fix division by zero on missing clock-frequency","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: davinci: fix division by zero on missing clock-frequency\n\nWhen the 'clock-frequency' property is missing from the device tree,\nthe driver falls back to DAVINCI_I2C_DEFAULT_BUS_FREQ. However, this\nmacro was defined in kHz (100), whereas the device tree property is\nexpected in Hz.\n\nThe probe function divided the fallback value by 1000, causing\ninteger truncation that resulted in dev->bus_freq = 0. This triggered\na deterministic division-by-zero kernel panic when calculating clock\ndividers later in the probe sequence.\n\nFix this by redefining DAVINCI_I2C_DEFAULT_BUS_FREQ in Hz (100000)\nto match the expected device tree property unit, allowing the existing\ndivision logic to work correctly for both cases.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-24 16:16:52","updated_at":"2026-07-24 16:16:52"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/030675aa54cf757769b3db65642433d626b3ed7c","name":"https://git.kernel.org/stable/c/030675aa54cf757769b3db65642433d626b3ed7c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3f43865cb64dd7cb50efae1281a95585617b12a1","name":"https://git.kernel.org/stable/c/3f43865cb64dd7cb50efae1281a95585617b12a1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9b694bc0e1831cbc5c3bbfd1b156ec719128f7d9","name":"https://git.kernel.org/stable/c/9b694bc0e1831cbc5c3bbfd1b156ec719128f7d9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64236","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64236","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b04ce63859793e3439b394976b8d29e785d4d69a 3f43865cb64dd7cb50efae1281a95585617b12a1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b04ce63859793e3439b394976b8d29e785d4d69a 9b694bc0e1831cbc5c3bbfd1b156ec719128f7d9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b04ce63859793e3439b394976b8d29e785d4d69a 030675aa54cf757769b3db65642433d626b3ed7c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.35 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.12 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/i2c/busses/i2c-davinci.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3f43865cb64dd7cb50efae1281a95585617b12a1","status":"affected","version":"b04ce63859793e3439b394976b8d29e785d4d69a","versionType":"git"},{"lessThan":"9b694bc0e1831cbc5c3bbfd1b156ec719128f7d9","status":"affected","version":"b04ce63859793e3439b394976b8d29e785d4d69a","versionType":"git"},{"lessThan":"030675aa54cf757769b3db65642433d626b3ed7c","status":"affected","version":"b04ce63859793e3439b394976b8d29e785d4d69a","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/i2c/busses/i2c-davinci.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.14"},{"lessThan":"6.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.35","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.12","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.14","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: davinci: fix division by zero on missing clock-frequency\n\nWhen the 'clock-frequency' property is missing from the device tree,\nthe driver falls back to DAVINCI_I2C_DEFAULT_BUS_FREQ. However, this\nmacro was defined in kHz (100), whereas the device tree property is\nexpected in Hz.\n\nThe probe function divided the fallback value by 1000, causing\ninteger truncation that resulted in dev->bus_freq = 0. This triggered\na deterministic division-by-zero kernel panic when calculating clock\ndividers later in the probe sequence.\n\nFix this by redefining DAVINCI_I2C_DEFAULT_BUS_FREQ in Hz (100000)\nto match the expected device tree property unit, allowing the existing\ndivision logic to work correctly for both cases."}],"providerMetadata":{"dateUpdated":"2026-07-24T15:27:41.371Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3f43865cb64dd7cb50efae1281a95585617b12a1"},{"url":"https://git.kernel.org/stable/c/9b694bc0e1831cbc5c3bbfd1b156ec719128f7d9"},{"url":"https://git.kernel.org/stable/c/030675aa54cf757769b3db65642433d626b3ed7c"}],"title":"i2c: davinci: fix division by zero on missing clock-frequency","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64236","datePublished":"2026-07-24T15:27:41.371Z","dateReserved":"2026-07-19T15:36:31.771Z","dateUpdated":"2026-07-24T15:27:41.371Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-24 16:16:52","lastModifiedDate":"2026-07-24 16:16:52","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64236","Ordinal":"1","Title":"i2c: davinci: fix division by zero on missing clock-frequency","CVE":"CVE-2026-64236","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64236","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: davinci: fix division by zero on missing clock-frequency\n\nWhen the 'clock-frequency' property is missing from the device tree,\nthe driver falls back to DAVINCI_I2C_DEFAULT_BUS_FREQ. However, this\nmacro was defined in kHz (100), whereas the device tree property is\nexpected in Hz.\n\nThe probe function divided the fallback value by 1000, causing\ninteger truncation that resulted in dev->bus_freq = 0. This triggered\na deterministic division-by-zero kernel panic when calculating clock\ndividers later in the probe sequence.\n\nFix this by redefining DAVINCI_I2C_DEFAULT_BUS_FREQ in Hz (100000)\nto match the expected device tree property unit, allowing the existing\ndivision logic to work correctly for both cases.","Type":"Description","Title":"i2c: davinci: fix division by zero on missing clock-frequency"}]}}}