Vulnerability-Lookup

FKIE_CVE-2025-38003

Vulnerability from fkie_nvd - Published: 2025-06-08 11:15 - Updated: 2026-07-30 06:22

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

Summary

In the Linux kernel, the following vulnerability has been resolved: can: bcm: add missing rcu read protection for procfs content When the procfs content is generated for a bcm_op which is in the process to be removed the procfs output might show unreliable data (UAF). As the removal of bcm_op's is already implemented with rcu handling this patch adds the missing rcu_read_lock() and makes sure the list entries are properly removed under rcu protection.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0622846db728a5332b917c797c733e202c4620ae	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/19f553a1ddf260da6570ed8f8d91a8c87f49b63a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1f912f8484e9c4396378c39460bbea0af681f319	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/63567ecd99a24495208dc860d50fb17440043006	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/659701c0b954ccdb4a916a4ad59bbc16e726d42c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6d7d458c41b98a5c1670cbd36f2923c37de51cf5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7c9db92d5f0eadca30884af75c53d601edc512ee	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dac5e6249159ac255dad9781793dbe5908ac9ddb	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Third Party Advisory

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.19
linux	linux_kernel	5.19
linux	linux_kernel	5.19
linux	linux_kernel	5.19
linux	linux_kernel	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15
debian	debian_linux	11.0

JSON

To clipboard

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: add missing rcu read protection for procfs content\n\nWhen the procfs content is generated for a bcm_op which is in the process\nto be removed the procfs output might show unreliable data (UAF).\n\nAs the removal of bcm_op\u0027s is already implemented with rcu handling this\npatch adds the missing rcu_read_lock() and makes sure the list entries\nare properly removed under rcu protection."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: bcm: a\u00f1adir protecci\u00f3n de lectura rcu faltante para el contenido de procfs. Cuando se genera el contenido de procfs para un bcm_op que se va a eliminar, la salida de procfs podr\u00eda mostrar datos no fiables (UAF). Dado que la eliminaci\u00f3n de bcm_op ya est\u00e1 implementada con la gesti\u00f3n de rcu, este parche a\u00f1ade el rcu_read_lock() faltante y garantiza que las entradas de la lista se eliminen correctamente bajo la protecci\u00f3n de rcu."
    }
  ],
  "id": "CVE-2025-38003",
  "lastModified": "2026-07-30T06:22:43.890",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
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  "published": "2025-06-08T11:15:20.990",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "NVD-CWE-noinfo"
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      "source": "nvd@nist.gov",
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}

CVE-2025-38003 (GCVE-0-2025-38003)

Vulnerability from cvelistv5 – Published: 2025-06-08 10:34 – Updated: 2026-08-05 11:58

Title

can: bcm: add missing rcu read protection for procfs content

Summary

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 CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

10 references

URL	Tags
https://git.kernel.org/stable/c/19f553a1ddf260da6…
https://git.kernel.org/stable/c/659701c0b954ccdb4…
https://git.kernel.org/stable/c/0622846db728a5332…
https://git.kernel.org/stable/c/6d7d458c41b98a5c1…
https://git.kernel.org/stable/c/1f912f8484e9c4396…
https://git.kernel.org/stable/c/63567ecd99a244952…
https://git.kernel.org/stable/c/7c9db92d5f0eadca3…
https://git.kernel.org/stable/c/dac5e6249159ac255…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5b48f5711f1c630841ab78dcc061de902f0e37bf , < 19f553a1ddf260da6570ed8f8d91a8c87f49b63a (git) Affected: 85cd41070df992d3c0dfd828866fdd243d3b774a , < 659701c0b954ccdb4a916a4ad59bbc16e726d42c (git) Affected: f34f2a18e47b73e48f90a757e1f4aaa8c7d665a1 , < 0622846db728a5332b917c797c733e202c4620ae (git) Affected: f1b4e32aca0811aa011c76e5d6cf2fa19224b386 , < 6d7d458c41b98a5c1670cbd36f2923c37de51cf5 (git) Affected: f1b4e32aca0811aa011c76e5d6cf2fa19224b386 , < 1f912f8484e9c4396378c39460bbea0af681f319 (git) Affected: f1b4e32aca0811aa011c76e5d6cf2fa19224b386 , < 63567ecd99a24495208dc860d50fb17440043006 (git) Affected: f1b4e32aca0811aa011c76e5d6cf2fa19224b386 , < 7c9db92d5f0eadca30884af75c53d601edc512ee (git) Affected: f1b4e32aca0811aa011c76e5d6cf2fa19224b386 , < dac5e6249159ac255dad9781793dbe5908ac9ddb (git) Affected: fbac09a3b8890003c0c55294c00709f3ae5501bb (git) Affected: edb4baffb9483141a50fb7f7146cfe4a4c0c2db8 (git) Affected: 5.4.205 , < 5.4.294 (semver) Affected: 5.10.130 , < 5.10.238 (semver) Affected: 5.15.54 , < 5.15.185 (semver) Affected: 4.19.252 , < 4.20 (semver) Affected: 5.18.11 , < 5.19 (semver)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 5.4.294 , ≤ 5.4.* (semver) Unaffected: 5.10.238 , ≤ 5.10.* (semver) Unaffected: 5.15.185 , ≤ 5.15.* (semver) Unaffected: 6.1.141 , ≤ 6.1.* (semver) Unaffected: 6.6.93 , ≤ 6.6.* (semver) Unaffected: 6.12.31 , ≤ 6.12.* (semver) Unaffected: 6.14.9 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix)

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{
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          "dateUpdated": "2025-11-03T17:33:02.902Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "product": "Linux",
          "programFiles": [
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              "versionType": "git"
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              "status": "affected",
              "version": "fbac09a3b8890003c0c55294c00709f3ae5501bb",
              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "semver"
            },
            {
              "lessThan": "5.15.185",
              "status": "affected",
              "version": "5.15.54",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.252",
              "versionType": "semver"
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              "lessThan": "5.19",
              "status": "affected",
              "version": "5.18.11",
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.294",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.238",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.31",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.294",
                  "versionStartIncluding": "5.4.205",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.238",
                  "versionStartIncluding": "5.10.130",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.185",
                  "versionStartIncluding": "5.15.54",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: add missing rcu read protection for procfs content\n\nWhen the procfs content is generated for a bcm_op which is in the process\nto be removed the procfs output might show unreliable data (UAF).\n\nAs the removal of bcm_op\u0027s is already implemented with rcu handling this\npatch adds the missing rcu_read_lock() and makes sure the list entries\nare properly removed under rcu protection."
        }
      ],
      "metrics": [
        {
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            "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 a local account to open a PF_CAN/CAN_BCM socket, issue RX_SETUP/RX_DELETE via sendmsg(), and read /proc/net/can-bcm/\u003cinode\u003e. No remote or adjacent network path reaches the racing procfs reader.\nAC:L - The attacker controls both sides of the race entirely \u2014 one thread loops reading the procfs entry while another loops RX_SETUP/RX_DELETE \u2014 and bcm_proc_show() held no lock whatsoever against the deleter, so the window is hit reliably by simple repetition; a working PoC was produced by the reporter for this bcm series.\nPR:L - can_create() performs no capability check, connect() with ifindex 0 needs no CAN device, and the created proc entry is mode 0644, so any unprivileged local user can drive the whole sequence in its own process (module autoload of can/can-bcm is also unprivileged).\nUI:N - The attacker performs every step itself \u2014 socket setup, op deletion, and reading its own procfs file \u2014 with no action by any other user.\nS:U - The freed object, the disclosure, and the crash are all within the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Fields are read from a freed bcm_op and formatted directly into world-readable procfs output; since bcm_op lands in the sprayable kmalloc-512 cache, an attacker reclaiming it controls the list cursor and can steer the walk to arbitrary kernel addresses, leaking their contents to userspace.\nI:H - This is a use-after-free on an attacker-reclaimable slab object whose linkage pointers are dereferenced after free, a primitive that combined with heap grooming is leveraged for kernel state corruption and control-flow influence.\nA:H - A concurrent plain list_del() leaves LIST_POISON1 in the cursor, so the unprotected walker dereferences a non-canonical/freed pointer and oopses; the walk can also spin over reclaimed memory or hit a divide-by-zero on a re-read frames_abs, crashing or hanging the kernel."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:58:54.550Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/19f553a1ddf260da6570ed8f8d91a8c87f49b63a"
        },
        {
          "url": "https://git.kernel.org/stable/c/659701c0b954ccdb4a916a4ad59bbc16e726d42c"
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/6d7d458c41b98a5c1670cbd36f2923c37de51cf5"
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/dac5e6249159ac255dad9781793dbe5908ac9ddb"
        }
      ],
      "title": "can: bcm: add missing rcu read protection for procfs content",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38003",
    "datePublished": "2025-06-08T10:34:55.808Z",
    "dateReserved": "2025-04-16T04:51:23.977Z",
    "dateUpdated": "2026-08-05T11:58:54.550Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

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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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