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GHSA-QF93-Q7MQ-9VV4

Vulnerability from github – Published: 2025-10-01 09:30 – Updated: 2025-12-12 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

net: dev_ioctl: take ops lock in hwtstamp lower paths

ndo hwtstamp callbacks are expected to run under the per-device ops lock. Make the lower get/set paths consistent with the rest of ndo invocations.

Kernel log: WARNING: CPU: 13 PID: 51364 at ./include/net/netdev_lock.h:70 __netdev_update_features+0x4bd/0xe60 ... RIP: 0010:__netdev_update_features+0x4bd/0xe60 ... Call Trace: netdev_update_features+0x1f/0x60 mlx5_hwtstamp_set+0x181/0x290 [mlx5_core] mlx5e_hwtstamp_set+0x19/0x30 [mlx5_core] dev_set_hwtstamp_phylib+0x9f/0x220 dev_set_hwtstamp_phylib+0x9f/0x220 dev_set_hwtstamp+0x13d/0x240 dev_ioctl+0x12f/0x4b0 sock_ioctl+0x171/0x370 __x64_sys_ioctl+0x3f7/0x900 ? __sys_setsockopt+0x69/0xb0 do_syscall_64+0x6f/0x2e0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 ... .... ---[ end trace 0000000000000000 ]---

Note that the mlx5_hwtstamp_set and mlx5e_hwtstamp_set functions shown in the trace come from an in progress patch converting the legacy ioctl to ndo_hwtstamp_get/set and are not present in mainline.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39908"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-01T08:15:33Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dev_ioctl: take ops lock in hwtstamp lower paths\n\nndo hwtstamp callbacks are expected to run under the per-device ops\nlock. Make the lower get/set paths consistent with the rest of ndo\ninvocations.\n\nKernel log:\nWARNING: CPU: 13 PID: 51364 at ./include/net/netdev_lock.h:70 __netdev_update_features+0x4bd/0xe60\n...\nRIP: 0010:__netdev_update_features+0x4bd/0xe60\n...\nCall Trace:\n\u003cTASK\u003e\nnetdev_update_features+0x1f/0x60\nmlx5_hwtstamp_set+0x181/0x290 [mlx5_core]\nmlx5e_hwtstamp_set+0x19/0x30 [mlx5_core]\ndev_set_hwtstamp_phylib+0x9f/0x220\ndev_set_hwtstamp_phylib+0x9f/0x220\ndev_set_hwtstamp+0x13d/0x240\ndev_ioctl+0x12f/0x4b0\nsock_ioctl+0x171/0x370\n__x64_sys_ioctl+0x3f7/0x900\n? __sys_setsockopt+0x69/0xb0\ndo_syscall_64+0x6f/0x2e0\nentry_SYSCALL_64_after_hwframe+0x4b/0x53\n...\n\u003c/TASK\u003e\n....\n---[ end trace 0000000000000000 ]---\n\nNote that the mlx5_hwtstamp_set and mlx5e_hwtstamp_set functions shown\nin the trace come from an in progress patch converting the legacy ioctl\nto ndo_hwtstamp_get/set and are not present in mainline.",
  "id": "GHSA-qf93-q7mq-9vv4",
  "modified": "2025-12-12T18:30:28Z",
  "published": "2025-10-01T09:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39908"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d92fa0cdc02291de57f72170e8b60cef0cf5372"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/686cab5a18e443e1d5f2abb17bed45837836425f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-39908 (GCVE-0-2025-39908)

Vulnerability from cvelistv5 – Published: 2025-10-01 07:44 – Updated: 2026-08-05 12:06

Title

net: dev_ioctl: take ops lock in hwtstamp lower paths

Summary

In the Linux kernel, the following vulnerability has been resolved: net: dev_ioctl: take ops lock in hwtstamp lower paths ndo hwtstamp callbacks are expected to run under the per-device ops lock. Make the lower get/set paths consistent with the rest of ndo invocations. Kernel log: WARNING: CPU: 13 PID: 51364 at ./include/net/netdev_lock.h:70 __netdev_update_features+0x4bd/0xe60 ... RIP: 0010:__netdev_update_features+0x4bd/0xe60 ... Call Trace: <TASK> netdev_update_features+0x1f/0x60 mlx5_hwtstamp_set+0x181/0x290 [mlx5_core] mlx5e_hwtstamp_set+0x19/0x30 [mlx5_core] dev_set_hwtstamp_phylib+0x9f/0x220 dev_set_hwtstamp_phylib+0x9f/0x220 dev_set_hwtstamp+0x13d/0x240 dev_ioctl+0x12f/0x4b0 sock_ioctl+0x171/0x370 __x64_sys_ioctl+0x3f7/0x900 ? __sys_setsockopt+0x69/0xb0 do_syscall_64+0x6f/0x2e0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 ... </TASK> .... ---[ end trace 0000000000000000 ]--- Note that the mlx5_hwtstamp_set and mlx5e_hwtstamp_set functions shown in the trace come from an in progress patch converting the legacy ioctl to ndo_hwtstamp_get/set and are not present in mainline.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-14 17:42 UTC

CWE

CWE-noinfo Not enough information

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/2d92fa0cdc02291de…
https://git.kernel.org/stable/c/686cab5a18e443e1d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ffb7ed19ac0a9fa9ea79af1d7b42c03a10da98a5 , < 2d92fa0cdc02291de57f72170e8b60cef0cf5372 (git) Affected: ffb7ed19ac0a9fa9ea79af1d7b42c03a10da98a5 , < 686cab5a18e443e1d5f2abb17bed45837836425f (git)
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (semver) Unaffected: 6.16.8 , ≤ 6.16.* (semver) Unaffected: 6.17 , ≤ * (original_commit_for_fix)

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        "metrics": [
          {
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              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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            }
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              "content": {
                "id": "CVE-2025-39908",
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                "timestamp": "2026-01-14T17:42:37.187417Z",
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          "shortName": "CISA-ADP"
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              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dev_ioctl: take ops lock in hwtstamp lower paths\n\nndo hwtstamp callbacks are expected to run under the per-device ops\nlock. Make the lower get/set paths consistent with the rest of ndo\ninvocations.\n\nKernel log:\nWARNING: CPU: 13 PID: 51364 at ./include/net/netdev_lock.h:70 __netdev_update_features+0x4bd/0xe60\n...\nRIP: 0010:__netdev_update_features+0x4bd/0xe60\n...\nCall Trace:\n\u003cTASK\u003e\nnetdev_update_features+0x1f/0x60\nmlx5_hwtstamp_set+0x181/0x290 [mlx5_core]\nmlx5e_hwtstamp_set+0x19/0x30 [mlx5_core]\ndev_set_hwtstamp_phylib+0x9f/0x220\ndev_set_hwtstamp_phylib+0x9f/0x220\ndev_set_hwtstamp+0x13d/0x240\ndev_ioctl+0x12f/0x4b0\nsock_ioctl+0x171/0x370\n__x64_sys_ioctl+0x3f7/0x900\n? __sys_setsockopt+0x69/0xb0\ndo_syscall_64+0x6f/0x2e0\nentry_SYSCALL_64_after_hwframe+0x4b/0x53\n...\n\u003c/TASK\u003e\n....\n---[ end trace 0000000000000000 ]---\n\nNote that the mlx5_hwtstamp_set and mlx5e_hwtstamp_set functions shown\nin the trace come from an in progress patch converting the legacy ioctl\nto ndo_hwtstamp_get/set and are not present in mainline."
        }
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          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is reached through the `SIOCGHWTSTAMP`/`SIOCSHWTSTAMP` socket ioctl on a stacked netdev (VLAN/bond/macvlan), which requires local access to the system. No remote or adjacent network input reaches this path.\nAC:L - The attacker fully controls one side of the race (spamming the unlocked ioctl in a tight loop) and can drive the other side by triggering device reconfiguration/VF resets or racing concurrent netdev-genl queue operations that take only `dev-\u003elock`; no attacker-uncontrollable precondition is required beyond a bond/VLAN/macvlan over an ops-locked NIC, which is a standard datacenter/cloud configuration.\nPR:L - `SIOCGHWTSTAMP` passes through `dev_ioctl`\u0027s default case with no capability check whatsoever, so any unprivileged local user reaches the unlocked lower-device ndo call; `SIOCSHWTSTAMP` requires only `ns_capable(net-\u003euser_ns, CAP_NET_ADMIN)`, which an unprivileged user obtains via user namespaces or holds inside a container netns.\nUI:N - The ioctl is issued directly by the attacker\u0027s own process; no victim action, mount, or file open is needed.\nS:U - The missing lock and its consequences are entirely within the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unserialized `ndo_hwtstamp_get`/`set` racing against `iavf_free_queues()`/queue reconfiguration yields use-after-free access to freed kernel heap objects, which is leverageable to read reclaimed kernel memory, and the get path can return torn driver state.\nI:H - The race produces a use-after-free read-modify-write (`adapter-\u003erx_rings[i].flags |= ...`) into a freed or reallocated array, and an out-of-bounds write once `num_active_queues` changes underneath the loop \u2014 a controllable kernel heap write primitive usable for privilege escalation.\nA:H - The missing lock trips `netdev_ops_assert_locked()`, producing a WARNING splat that panics on `panic_on_warn` systems, and the underlying use-after-free/NULL-deref on `adapter-\u003erx_rings` crashes the kernel outright."
            }
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    "cveId": "CVE-2025-39908",
    "datePublished": "2025-10-01T07:44:31.904Z",
    "dateReserved": "2025-04-16T07:20:57.146Z",
    "dateUpdated": "2026-08-05T12:06:01.925Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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