222 lines
12 KiB
JSON
222 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-74603",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-15T05:44:03.919Z",
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"datePublished": "2026-08-22T15:31:51.544Z",
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"dateUpdated": "2026-08-25T05:40:27.399Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-25T05:40:27.399Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 7.1,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/ptp/ptp_ocp.c"
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],
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"versions": [
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{
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"version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
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"lessThan": "72ef3ce80078199bfad32f98d055f44ba7cd0c3d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
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"lessThan": "3d965811be78473654e6e8cc8e4fb7b6b87aa6c1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
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"lessThan": "f92558bbe78d6284fedd053900f82a70f0aa8707",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
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"lessThan": "5fd91dd4a143479b0575fb1f202ec1c501e71fd5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
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"lessThan": "f8d7e5751267637190eff887c971d5b468106213",
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"status": "affected",
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"versionType": "git"
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{
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"version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
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"lessThan": "6b69f2ef10cdb018c0b127a7cab88e590bbddba4",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/ptp/ptp_ocp.c"
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],
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"versions": [
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{
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"version": "5.18",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.18",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.152",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.104",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.45",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.9",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.18",
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"versionEndExcluding": "6.1.183"
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"vulnerable": true,
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/72ef3ce80078199bfad32f98d055f44ba7cd0c3d"
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},
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{
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"url": "https://git.kernel.org/stable/c/3d965811be78473654e6e8cc8e4fb7b6b87aa6c1"
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},
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{
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"url": "https://git.kernel.org/stable/c/f92558bbe78d6284fedd053900f82a70f0aa8707"
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},
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{
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"url": "https://git.kernel.org/stable/c/5fd91dd4a143479b0575fb1f202ec1c501e71fd5"
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},
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{
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"url": "https://git.kernel.org/stable/c/f8d7e5751267637190eff887c971d5b468106213"
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},
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{
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"url": "https://git.kernel.org/stable/c/6b69f2ef10cdb018c0b127a7cab88e590bbddba4"
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}
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],
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"title": "ptp: ocp: Fix board ID over-read",
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