Vulnerability-Lookup

GHSA-45PP-43QP-PMGC

Vulnerability from github – Published: 2025-07-25 18:30 – Updated: 2025-12-23 00:30

Details

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

ipmi:msghandler: Fix potential memory corruption in ipmi_create_user()

The "intf" list iterator is an invalid pointer if the correct "intf->intf_num" is not found. Calling atomic_dec(&intf->nr_users) on and invalid pointer will lead to memory corruption.

We don't really need to call atomic_dec() if we haven't called atomic_add_return() so update the if (intf->in_shutdown) path as well.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38456"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-25T16:15:31Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipmi:msghandler: Fix potential memory corruption in ipmi_create_user()\n\nThe \"intf\" list iterator is an invalid pointer if the correct\n\"intf-\u003eintf_num\" is not found.  Calling atomic_dec(\u0026intf-\u003enr_users) on\nand invalid pointer will lead to memory corruption.\n\nWe don\u0027t really need to call atomic_dec() if we haven\u0027t called\natomic_add_return() so update the if (intf-\u003ein_shutdown) path as well.",
  "id": "GHSA-45pp-43qp-pmgc",
  "modified": "2025-12-23T00:30:30Z",
  "published": "2025-07-25T18:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38456"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c1a6ddb99858e7d68961f74ae27caeeeca67b6a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e0d33e75c1604c3fad5586ad4dfa3b2695a3950"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbc1670297f675854e982d23c8583900ff0cc67a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2d5c005dfc96fe857676d1d8ac46b29275cb89b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa332f5dc6fc662ad7d3200048772c96b861cf6b"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-38456 (GCVE-0-2025-38456)

Vulnerability from cvelistv5 – Published: 2025-07-25 15:27 – Updated: 2026-08-05 12:02

Title

ipmi:msghandler: Fix potential memory corruption in ipmi_create_user()

Summary

In the Linux kernel, the following vulnerability has been resolved: ipmi:msghandler: Fix potential memory corruption in ipmi_create_user() The "intf" list iterator is an invalid pointer if the correct "intf->intf_num" is not found. Calling atomic_dec(&intf->nr_users) on and invalid pointer will lead to memory corruption. We don't really need to call atomic_dec() if we haven't called atomic_add_return() so update the if (intf->in_shutdown) path as well.

Severity

7.8 (High)


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

Assigner

Linux mitre root Scorecard

References

6 references

URL	Tags
https://git.kernel.org/stable/c/cbc1670297f675854…
https://git.kernel.org/stable/c/e2d5c005dfc96fe85…
https://git.kernel.org/stable/c/9e0d33e75c1604c3f…
https://git.kernel.org/stable/c/7c1a6ddb99858e7d6…
https://git.kernel.org/stable/c/fa332f5dc6fc662ad…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8e76741c3d8b20dfa2d6c30fa10ff927cfd93d82 , < cbc1670297f675854e982d23c8583900ff0cc67a (git) Affected: 8e76741c3d8b20dfa2d6c30fa10ff927cfd93d82 , < e2d5c005dfc96fe857676d1d8ac46b29275cb89b (git) Affected: 8e76741c3d8b20dfa2d6c30fa10ff927cfd93d82 , < 9e0d33e75c1604c3fad5586ad4dfa3b2695a3950 (git) Affected: 8e76741c3d8b20dfa2d6c30fa10ff927cfd93d82 , < 7c1a6ddb99858e7d68961f74ae27caeeeca67b6a (git) Affected: 8e76741c3d8b20dfa2d6c30fa10ff927cfd93d82 , < fa332f5dc6fc662ad7d3200048772c96b861cf6b (git)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 6.1.146 , ≤ 6.1.* (semver) Unaffected: 6.6.99 , ≤ 6.6.* (semver) Unaffected: 6.12.39 , ≤ 6.12.* (semver) Unaffected: 6.15.7 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)

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{
  "containers": {
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      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T17:38:12.328Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          }
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              "value": "AV:L - The only attacker-influenced entry point is `open(\"/dev/ipmiN\")` on the IPMI character device, which feeds `iminor(inode)` directly into `ipmi_create_user()`. No remote or adjacent-network data reaches this code path.\nAC:L - Once the attacker can open a device node whose minor has no live interface \u2014 a stale/extra node, or the wide window in `ipmi_unregister_smi()` between `list_del()` and `smi_gone()` destroying the node \u2014 the out-of-bounds `atomic_dec()` fires deterministically on every call, and can be repeated arbitrarily many times to decrement the target global by a chosen amount.\nPR:L - There is no `capable()`, LSM, or any other privilege check anywhere in `ipmi_open()` \u2192 `ipmi_create_user()`; the sole gate is filesystem permissions on `/dev/ipmiN`, which deployments routinely grant to a non-root management group or account for ipmitool/freeipmi-style tooling.\nUI:N - A single `open()` syscall by the attacker triggers the corruption; no victim action, mount, or file-open by another user is required.\nS:U - The corruption is of kernel `.data` and its consequences (privilege escalation, crash) stay within the kernel\u0027s own security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The out-of-bounds write targets kernel globals adjacent to `ipmi_interfaces` \u2014 `list_head` and `struct mutex` objects \u2014 and corrupting a list pointer\u0027s low word yields a traversable wild pointer usable as a kernel memory read primitive, so full confidentiality loss is achievable.\nI:H - This is a controlled out-of-bounds write: a repeatable decrement at a fixed, known kernel-global address, letting the attacker set that word to an arbitrary lower value and thereby corrupt lock ownership or global list pointers into an arbitrary-write primitive and control-flow hijack.\nA:H - Corrupting the module\u0027s global mutex owner and list-head state leads to lock-state confusion, deadlock, or an oops/panic on the next traversal, giving a complete denial of service."
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    "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.

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.
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GHSA-45PP-43QP-PMGC

CVE-2025-38456 (GCVE-0-2025-38456)

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