CVE-2025-68329 (GCVE-0-2025-68329)

Vulnerability from cvelistv5 – Published: 2025-12-22 16:12 – Updated: 2026-05-11 21:51
VLAI
Title
tracing: Fix WARN_ON in tracing_buffers_mmap_close for split VMAs
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix WARN_ON in tracing_buffers_mmap_close for split VMAs When a VMA is split (e.g., by partial munmap or MAP_FIXED), the kernel calls vm_ops->close on each portion. For trace buffer mappings, this results in ring_buffer_unmap() being called multiple times while ring_buffer_map() was only called once. This causes ring_buffer_unmap() to return -ENODEV on subsequent calls because user_mapped is already 0, triggering a WARN_ON. Trace buffer mappings cannot support partial mappings because the ring buffer structure requires the complete buffer including the meta page. Fix this by adding a may_split callback that returns -EINVAL to prevent VMA splits entirely.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: cf9f0f7c4c5bb45e7bb270e48bab6f7837825a64 , < 922fdd0b755a84f9933b3ca195f60092b6bb88ee (git)
Affected: cf9f0f7c4c5bb45e7bb270e48bab6f7837825a64 , < 45053c12c45f0fb8ef6ab95118dd928d2fec0255 (git)
Affected: cf9f0f7c4c5bb45e7bb270e48bab6f7837825a64 , < b042fdf18e89a347177a49e795d8e5184778b5b6 (git)
Create a notification for this product.
Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.12.61 , ≤ 6.12.* (semver)
Unaffected: 6.17.11 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/trace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "922fdd0b755a84f9933b3ca195f60092b6bb88ee",
              "status": "affected",
              "version": "cf9f0f7c4c5bb45e7bb270e48bab6f7837825a64",
              "versionType": "git"
            },
            {
              "lessThan": "45053c12c45f0fb8ef6ab95118dd928d2fec0255",
              "status": "affected",
              "version": "cf9f0f7c4c5bb45e7bb270e48bab6f7837825a64",
              "versionType": "git"
            },
            {
              "lessThan": "b042fdf18e89a347177a49e795d8e5184778b5b6",
              "status": "affected",
              "version": "cf9f0f7c4c5bb45e7bb270e48bab6f7837825a64",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/trace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.61",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.61",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.11",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix WARN_ON in tracing_buffers_mmap_close for split VMAs\n\nWhen a VMA is split (e.g., by partial munmap or MAP_FIXED), the kernel\ncalls vm_ops-\u003eclose on each portion. For trace buffer mappings, this\nresults in ring_buffer_unmap() being called multiple times while\nring_buffer_map() was only called once.\n\nThis causes ring_buffer_unmap() to return -ENODEV on subsequent calls\nbecause user_mapped is already 0, triggering a WARN_ON.\n\nTrace buffer mappings cannot support partial mappings because the ring\nbuffer structure requires the complete buffer including the meta page.\n\nFix this by adding a may_split callback that returns -EINVAL to prevent\nVMA splits entirely."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:51:04.994Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/922fdd0b755a84f9933b3ca195f60092b6bb88ee"
        },
        {
          "url": "https://git.kernel.org/stable/c/45053c12c45f0fb8ef6ab95118dd928d2fec0255"
        },
        {
          "url": "https://git.kernel.org/stable/c/b042fdf18e89a347177a49e795d8e5184778b5b6"
        }
      ],
      "title": "tracing: Fix WARN_ON in tracing_buffers_mmap_close for split VMAs",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68329",
    "datePublished": "2025-12-22T16:12:23.133Z",
    "dateReserved": "2025-12-16T14:48:05.296Z",
    "dateUpdated": "2026-05-11T21:51:04.994Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-68329",
      "date": "2026-06-07",
      "epss": "0.00024",
      "percentile": "0.0703"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68329\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-22T17:16:00.580\",\"lastModified\":\"2025-12-23T14:51:52.650\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntracing: Fix WARN_ON in tracing_buffers_mmap_close for split VMAs\\n\\nWhen a VMA is split (e.g., by partial munmap or MAP_FIXED), the kernel\\ncalls vm_ops-\u003eclose on each portion. For trace buffer mappings, this\\nresults in ring_buffer_unmap() being called multiple times while\\nring_buffer_map() was only called once.\\n\\nThis causes ring_buffer_unmap() to return -ENODEV on subsequent calls\\nbecause user_mapped is already 0, triggering a WARN_ON.\\n\\nTrace buffer mappings cannot support partial mappings because the ring\\nbuffer structure requires the complete buffer including the meta page.\\n\\nFix this by adding a may_split callback that returns -EINVAL to prevent\\nVMA splits entirely.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/45053c12c45f0fb8ef6ab95118dd928d2fec0255\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/922fdd0b755a84f9933b3ca195f60092b6bb88ee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b042fdf18e89a347177a49e795d8e5184778b5b6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.