{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-50195", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.968Z", "datePublished": "2024-11-08T05:54:10.183Z", "dateUpdated": "2026-08-05T11:42:26.108Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:42:26.108Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nposix-clock: Fix missing timespec64 check in pc_clock_settime()\n\nAs Andrew pointed out, it will make sense that the PTP core\nchecked timespec64 struct's tv_sec and tv_nsec range before calling\nptp->info->settime64().\n\nAs the man manual of clock_settime() said, if tp.tv_sec is negative or\ntp.tv_nsec is outside the range [0..999,999,999], it should return EINVAL,\nwhich include dynamic clocks which handles PTP clock, and the condition is\nconsistent with timespec64_valid(). As Thomas suggested, timespec64_valid()\nonly check the timespec is valid, but not ensure that the time is\nin a valid range, so check it ahead using timespec64_valid_strict()\nin pc_clock_settime() and return -EINVAL if not valid.\n\nThere are some drivers that use tp->tv_sec and tp->tv_nsec directly to\nwrite registers without validity checks and assume that the higher layer\nhas checked it, which is dangerous and will benefit from this, such as\nhclge_ptp_settime(), igb_ptp_settime_i210(), _rcar_gen4_ptp_settime(),\nand some drivers can remove the checks of itself." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The only entry point is the local `clock_settime()`/`clock_settime32()` syscall with a dynamic CLOCKFD clockid derived from an open file descriptor on a `/dev/ptpN` character device. There is no network, adjacent, or remote-peer path into `pc_clock_settime()`.\nAC:L - A single syscall with e.g. `tv_nsec = 1000000000` or `tv_sec = -1` deterministically drives the unvalidated value into the driver callback — no race, no timing window, no memory-layout or victim-state dependency, and it can be repeated at will.\nPR:L - No capability check exists anywhere on the path; the sole gate is `FMODE_WRITE` on a PTP character device, which is routinely granted to non-root PTP/TSN daemons (linuxptp running with dropped privileges), containers, and appliance workloads in telecom, automotive and cloud deployments. An ordinary unprivileged user holding such a descriptor fully controls the trigger.\nUI:N - The attacker performs the whole sequence on a descriptor they opened themselves with one syscall. No mount, file open, or other action by another user is required.\nS:U - The corrupted state is the kernel's own PTP/posix-clock objects and the NIC's PHC managed by the same kernel security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:N - The defect is a missing input-validation check on a value flowing inward to hardware registers and time arithmetic; nothing is read out of bounds, no freed object is reused, and no kernel memory is copied back to userspace, so no read primitive exists.\nI:H - The attacker gains full, arbitrary control over the value programmed into the PTP hardware clock — the authoritative time base for all hardware timestamping on the interface, for PTP/gPTP synchronization of downstream nodes, and for TSN taprio/ETF gate schedules — and drivers such as `hclge_ptp_settime()`, `igb_ptp_settime_i210()` and `_rcar_gen4_ptp_settime()` commit it to registers with no checks of their own. Malicious modification of that specific state is a direct, serious integrity consequence for the impacted component, and it also drives undefined arithmetic (`timespec64_to_ns()` overflow, `timecounter_init()`, `do_div()` in `vsc9959_new_base_time()`) in code that assumed a validated input.\nA:H - Programming an out-of-range or negative time into the PHC produces a total, persistent loss of hardware timestamping, PTP synchronization and time-aware-shaper transmission on that interface — TSN gate schedules recomputed from the poisoned base never open, and the condition can be re-triggered at will so the service cannot recover. The unvalidated value additionally reaches out-of-spec hardware register writes and overflowing kernel time arithmetic on paths that assume validated input." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/time/posix-clock.c" ], "versions": [ { "version": "0606f422b453f76c31ab2b1bd52943ff06a2dcf2", "lessThan": "29f085345cde24566efb751f39e5d367c381c584", "status": "affected", "versionType": "git" }, { "version": "0606f422b453f76c31ab2b1bd52943ff06a2dcf2", "lessThan": "e0c966bd3e31911b57ef76cec4c5796ebd88e512", "status": "affected", "versionType": "git" }, { "version": "0606f422b453f76c31ab2b1bd52943ff06a2dcf2", "lessThan": "673a1c5a2998acbd429d6286e6cad10f17f4f073", "status": "affected", "versionType": "git" }, { "version": "0606f422b453f76c31ab2b1bd52943ff06a2dcf2", "lessThan": "c8789fbe2bbf75845e45302cba6ffa44e1884d01", "status": "affected", "versionType": "git" }, { "version": "0606f422b453f76c31ab2b1bd52943ff06a2dcf2", "lessThan": "27abbde44b6e71ee3891de13e1a228aa7ce95bfe", "status": "affected", "versionType": "git" }, { "version": "0606f422b453f76c31ab2b1bd52943ff06a2dcf2", "lessThan": "a3f169e398215e71361774d13bf91a0101283ac2", "status": "affected", "versionType": "git" }, { "version": "0606f422b453f76c31ab2b1bd52943ff06a2dcf2", "lessThan": "1ff7247101af723731ea42ed565d54fb8f341264", "status": "affected", "versionType": "git" }, { "version": "0606f422b453f76c31ab2b1bd52943ff06a2dcf2", "lessThan": "d8794ac20a299b647ba9958f6d657051fc51a540", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/time/posix-clock.c" ], "versions": [ { "version": "2.6.39", "status": "affected" }, { "version": "0", "lessThan": "2.6.39", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.323", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.285", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.228", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.169", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.114", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.58", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.5", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "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": "2.6.39", "versionEndExcluding": "4.19.323" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "5.4.285" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "5.10.228" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "5.15.169" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.1.114" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.6.58" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.11.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/29f085345cde24566efb751f39e5d367c381c584" }, { "url": "https://git.kernel.org/stable/c/e0c966bd3e31911b57ef76cec4c5796ebd88e512" }, { "url": "https://git.kernel.org/stable/c/673a1c5a2998acbd429d6286e6cad10f17f4f073" }, { "url": "https://git.kernel.org/stable/c/c8789fbe2bbf75845e45302cba6ffa44e1884d01" }, { "url": "https://git.kernel.org/stable/c/27abbde44b6e71ee3891de13e1a228aa7ce95bfe" }, { "url": "https://git.kernel.org/stable/c/a3f169e398215e71361774d13bf91a0101283ac2" }, { "url": "https://git.kernel.org/stable/c/1ff7247101af723731ea42ed565d54fb8f341264" }, { "url": "https://git.kernel.org/stable/c/d8794ac20a299b647ba9958f6d657051fc51a540" } ], "title": "posix-clock: Fix missing timespec64 check in pc_clock_settime()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-50195", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:18:04.312116Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-754", "description": "CWE-754 Improper Check for Unusual or Exceptional Conditions" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:27:07.870Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:26:50.538Z" } } ] } }