{"api_version":"1","generated_at":"2026-08-25T06:41:27+00:00","cve":"CVE-2026-74603","urls":{"html":"https://cve.report/CVE-2026-74603","api":"https://cve.report/api/cve/CVE-2026-74603.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74603","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74603"},"summary":{"title":"ptp: ocp: Fix board ID over-read","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nptp: ocp: Fix board ID over-read\n\nThe EEPROM board ID is a fixed 13-byte field and is not guaranteed to\ncontain a NUL terminator. Passing it directly to\ndevlink_info_version_fixed_put() treats it as a C string and may read\nbeyond the field.\n\nFormat at most OCP_BOARD_ID_LEN bytes into the existing local buffer\nbefore reporting the ID. Use a precision limit because the snprintf()\noutput size alone does not bound the source string scan.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:32","updated_at":"2026-08-25 06:18:36"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","data":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/3d965811be78473654e6e8cc8e4fb7b6b87aa6c1","name":"https://git.kernel.org/stable/c/3d965811be78473654e6e8cc8e4fb7b6b87aa6c1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f92558bbe78d6284fedd053900f82a70f0aa8707","name":"https://git.kernel.org/stable/c/f92558bbe78d6284fedd053900f82a70f0aa8707","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/72ef3ce80078199bfad32f98d055f44ba7cd0c3d","name":"https://git.kernel.org/stable/c/72ef3ce80078199bfad32f98d055f44ba7cd0c3d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f8d7e5751267637190eff887c971d5b468106213","name":"https://git.kernel.org/stable/c/f8d7e5751267637190eff887c971d5b468106213","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6b69f2ef10cdb018c0b127a7cab88e590bbddba4","name":"https://git.kernel.org/stable/c/6b69f2ef10cdb018c0b127a7cab88e590bbddba4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5fd91dd4a143479b0575fb1f202ec1c501e71fd5","name":"https://git.kernel.org/stable/c/5fd91dd4a143479b0575fb1f202ec1c501e71fd5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74603","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74603","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4 72ef3ce80078199bfad32f98d055f44ba7cd0c3d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4 3d965811be78473654e6e8cc8e4fb7b6b87aa6c1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4 f92558bbe78d6284fedd053900f82a70f0aa8707 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4 5fd91dd4a143479b0575fb1f202ec1c501e71fd5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4 f8d7e5751267637190eff887c971d5b468106213 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4 6b69f2ef10cdb018c0b127a7cab88e590bbddba4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"74603","cve":"CVE-2026-74603","epss":"0.001730000","percentile":"0.067060000","score_date":"2026-08-24","updated_at":"2026-08-25 00:11:33"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/ptp/ptp_ocp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"72ef3ce80078199bfad32f98d055f44ba7cd0c3d","status":"affected","version":"0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4","versionType":"git"},{"lessThan":"3d965811be78473654e6e8cc8e4fb7b6b87aa6c1","status":"affected","version":"0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4","versionType":"git"},{"lessThan":"f92558bbe78d6284fedd053900f82a70f0aa8707","status":"affected","version":"0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4","versionType":"git"},{"lessThan":"5fd91dd4a143479b0575fb1f202ec1c501e71fd5","status":"affected","version":"0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4","versionType":"git"},{"lessThan":"f8d7e5751267637190eff887c971d5b468106213","status":"affected","version":"0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4","versionType":"git"},{"lessThan":"6b69f2ef10cdb018c0b127a7cab88e590bbddba4","status":"affected","version":"0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/ptp/ptp_ocp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.18"},{"lessThan":"5.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.152","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.104","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nptp: ocp: Fix board ID over-read\n\nThe EEPROM board ID is a fixed 13-byte field and is not guaranteed to\ncontain a NUL terminator. Passing it directly to\ndevlink_info_version_fixed_put() treats it as a C string and may read\nbeyond the field.\n\nFormat at most OCP_BOARD_ID_LEN bytes into the existing local buffer\nbefore reporting the ID. Use a precision limit because the snprintf()\noutput size alone does not bound the source string scan."}],"metrics":[{"cvssV3_1":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerable code is reached only through the devlink generic-netlink interface (DEVLINK_CMD_INFO_GET) via a local socket; ptp_ocp is a PCI PTP timecard driver with no network, Bluetooth, or physical-device input path to ptp_ocp_devlink_info_get().\nAC:L - On a system with a probed OCP timecard, issuing devlink info deterministically calls ptp_ocp_devlink_info_get() and passes the 13-byte EEPROM board_id that is not guaranteed to be NUL-terminated, so the over-read is reliably triggered without races or attacker-uncontrollable layout.\nPR:L - DEVLINK_CMD_INFO_GET is registered with only GENL_CMD_CAP_DO/GENL_CMD_CAP_DUMP and no GENL_ADMIN_PERM, and devlink_nl_pre_doit() adds no capability check, so any unprivileged local user with generic netlink access can invoke the vulnerable handler.\nUI:N - Exploitation requires only the attacker issuing a devlink info netlink request; no administrator or other user action is needed beyond the attacker having local access to the host.\nS:U - Kernel memory disclosure and any resulting crash are confined to the same host kernel; the bug does not cross VM, IOMMU, or sandbox security boundaries.\nC:H - Passing the non-NUL-terminated board_id to devlink_info_version_fixed_put() makes devlink_info_version_put() and nla_put_string() use strlen(), reading past the 13-byte field through adjacent ptp_ocp/devlink private memory and returning leaked bytes in the netlink reply to the caller.\nI:N - The defect is purely an out-of-bounds kernel read with no write, heap corruption, or control-flow hijack primitive; only kernel memory is scanned and copied into the netlink response.\nA:H - strlen() on the unterminated board_id can walk through subsequent kmalloc-backed struct fields and potentially past the devlink private allocation, touching unmapped pages and oopsing/panicking the kernel; an unprivileged user can repeat the devlink info query to retrigger it."}]}],"providerMetadata":{"dateUpdated":"2026-08-25T05:40:27.399Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/72ef3ce80078199bfad32f98d055f44ba7cd0c3d"},{"url":"https://git.kernel.org/stable/c/3d965811be78473654e6e8cc8e4fb7b6b87aa6c1"},{"url":"https://git.kernel.org/stable/c/f92558bbe78d6284fedd053900f82a70f0aa8707"},{"url":"https://git.kernel.org/stable/c/5fd91dd4a143479b0575fb1f202ec1c501e71fd5"},{"url":"https://git.kernel.org/stable/c/f8d7e5751267637190eff887c971d5b468106213"},{"url":"https://git.kernel.org/stable/c/6b69f2ef10cdb018c0b127a7cab88e590bbddba4"}],"title":"ptp: ocp: Fix board ID over-read","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74603","datePublished":"2026-08-22T15:31:51.544Z","dateReserved":"2026-08-15T05:44:03.919Z","dateUpdated":"2026-08-25T05:40:27.399Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:32","lastModifiedDate":"2026-08-25 06:18:36","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74603","Ordinal":"1","Title":"ptp: ocp: Fix board ID over-read","CVE":"CVE-2026-74603","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74603","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nptp: ocp: Fix board ID over-read\n\nThe EEPROM board ID is a fixed 13-byte field and is not guaranteed to\ncontain a NUL terminator. Passing it directly to\ndevlink_info_version_fixed_put() treats it as a C string and may read\nbeyond the field.\n\nFormat at most OCP_BOARD_ID_LEN bytes into the existing local buffer\nbefore reporting the ID. Use a precision limit because the snprintf()\noutput size alone does not bound the source string scan.","Type":"Description","Title":"ptp: ocp: Fix board ID over-read"}]}}}