CVE-2025-21924 (GCVE-0-2025-21924)
Vulnerability from cvelistv5
Published
2025-04-01 15:40
Modified
2026-08-05 11:55
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: hns3: make sure ptp clock is unregister and freed if hclge_ptp_get_cycle returns an error During the initialization of ptp, hclge_ptp_get_cycle might return an error and returned directly without unregister clock and free it. To avoid that, call hclge_ptp_destroy_clock to unregist and free clock if hclge_ptp_get_cycle failed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8373cd38a8888549ace7c7617163a2e826970a92
Version: 8373cd38a8888549ace7c7617163a2e826970a92
Version: 8373cd38a8888549ace7c7617163a2e826970a92
Version: 8373cd38a8888549ace7c7617163a2e826970a92
Version: 8373cd38a8888549ace7c7617163a2e826970a92
Version: 8373cd38a8888549ace7c7617163a2e826970a92
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            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
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        "title": "CVE Program Container"
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    "cna": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_ptp.c"
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              "version": "0",
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              "version": "5.15.179",
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              "version": "6.1.131",
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              "status": "unaffected",
              "version": "6.6.83",
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              "version": "6.12.19",
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              "version": "6.13.7",
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      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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      "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": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation requires local access to the stale PTP clock left behind \u2014 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-\u003einfo` (`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\u0027s 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-\u003einfo-\u003ename)`, 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-\u003eptp-\u003eio_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()`."
            }
          ]
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:55:22.940Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21924",
    "datePublished": "2025-04-01T15:40:56.841Z",
    "dateReserved": "2024-12-29T08:45:45.788Z",
    "dateUpdated": "2026-08-05T11:55:22.940Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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