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vuln-cve/data/2025/21xxx/CVE-2025-21924.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-21924",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-12-29T08:45:45.788Z",
"datePublished": "2025-04-01T15:40:56.841Z",
"dateUpdated": "2026-10-15T21:51:55.551Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T11:55:22.940Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hns3: make sure ptp clock is unregister and freed if hclge_ptp_get_cycle returns an error\n\nDuring the initialization of ptp, hclge_ptp_get_cycle might return an error\nand returned directly without unregister clock and free it. To avoid that,\ncall hclge_ptp_destroy_clock to unregist and free clock if\nhclge_ptp_get_cycle failed."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - Exploitation requires local access to the stale PTP clock left behind — reading world-readable `/sys/class/ptp/ptpN/clock_name` or issuing ioctls/clock_adjtime on `/dev/ptpN`; no network traffic reaches this code.\nAC:L - On an affected platform the dangling `ptp_clock` is created deterministically on every failed probe/reset with no race to win and no memory-layout precondition, so the attacker can dereference the freed `ptp_clock_info` at will.\nPR:L - The PTP sysfs attributes that dereference the freed `ptp->info` (`clock_name`, `max_adjustment`, `n_*`) are mode 0444, so any unprivileged local account can trigger the use-after-free; `/dev/ptpN` widens this further where PTP daemons/containers are granted access.\nUI:N - The dangling registration is created by driver probe or device reset at boot; the attacker acts alone and needs no victim to perform any action.\nS:U - The freed devm slab object and the PTP core both reside in the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Use-after-free of the `hclge_ptp` object leaks reallocated slab contents through `sysfs_emit(\"%s\", ptp->info->name)`, and `hclge_ptp_gettimex()` returns `readl()` from an `io_base` taken from the freed object, yielding an attacker-directed read primitive.\nI:H - `hclge_ptp_settime()`/`adjtime()`/`adjfine()` perform `writel(attacker_value, hdev->ptp->io_base + off)` with both value and address sourced from the freed allocation, giving an arbitrary-write primitive once the slab is groomed, plus dangling function pointers in `ptp_clock_info` for control-flow hijack.\nA:H - Any access to the orphaned PTP clock dereferences freed memory (and unmapped MMIO after `pcim_iounmap`), reliably producing an oops or panic; the reset path additionally leaves `cycle.den == 0` reachable by `div_u64_rem()`."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_ptp.c"
],
"versions": [
{
"version": "8373cd38a8888549ace7c7617163a2e826970a92",
"lessThan": "b7d8d4529984e2d4a72a6d552fb886233e8e83cb",
"status": "affected",
"versionType": "git"
},
{
"version": "8373cd38a8888549ace7c7617163a2e826970a92",
"lessThan": "33244e98aa9503585e585335fe2ceb4492630949",
"status": "affected",
"versionType": "git"
},
{
"version": "8373cd38a8888549ace7c7617163a2e826970a92",
"lessThan": "2c04e507f3a5c5dc6e2b9ab37d8cdedee1ef1a37",
"status": "affected",
"versionType": "git"
},
{
"version": "8373cd38a8888549ace7c7617163a2e826970a92",
"lessThan": "9cfc43c0e6e6a31122b4008d763a2960c206aa2d",
"status": "affected",
"versionType": "git"
},
{
"version": "8373cd38a8888549ace7c7617163a2e826970a92",
"lessThan": "21dba813d9821687a7f9aff576798ba21a859a32",
"status": "affected",
"versionType": "git"
},
{
"version": "8373cd38a8888549ace7c7617163a2e826970a92",
"lessThan": "b7365eab39831487a84e63a9638209b68dc54008",
"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/ethernet/hisilicon/hns3/hns3pf/hclge_ptp.c"
],
"versions": [
{
"version": "5.14",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.14",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.179",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.131",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.83",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.19",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.13.7",
"lessThanOrEqual": "6.13.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.14",
"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": "5.14",
"versionEndExcluding": "5.15.179"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "6.1.131"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "6.6.83"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "6.12.19"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "6.13.7"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "6.14"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/b7d8d4529984e2d4a72a6d552fb886233e8e83cb"
},
{
"url": "https://git.kernel.org/stable/c/33244e98aa9503585e585335fe2ceb4492630949"
},
{
"url": "https://git.kernel.org/stable/c/2c04e507f3a5c5dc6e2b9ab37d8cdedee1ef1a37"
},
{
"url": "https://git.kernel.org/stable/c/9cfc43c0e6e6a31122b4008d763a2960c206aa2d"
},
{
"url": "https://git.kernel.org/stable/c/21dba813d9821687a7f9aff576798ba21a859a32"
},
{
"url": "https://git.kernel.org/stable/c/b7365eab39831487a84e63a9638209b68dc54008"
}
],
"title": "net: hns3: make sure ptp clock is unregister and freed if hclge_ptp_get_cycle returns an error",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"title": "CVE Program Container",
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
}
],
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2025-11-03T19:39:17.991Z"
}
},
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2025-21924",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-10-15T21:43:44.162424Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-15T21:51:55.551Z"
}
}
]
}
}
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