CVE-2025-68370 (GCVE-0-2025-68370)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:32 – Updated: 2026-08-05 12:11
VLAI
Title
coresight: tmc: add the handle of the event to the path
Summary
In the Linux kernel, the following vulnerability has been resolved: coresight: tmc: add the handle of the event to the path The handle is essential for retrieving the AUX_EVENT of each CPU and is required in perf mode. It has been added to the coresight_path so that dependent devices can access it from the path when needed. The existing bug can be reproduced with: perf record -e cs_etm//k -C 0-9 dd if=/dev/zero of=/dev/null Showing an oops as follows: Unable to handle kernel paging request at virtual address 000f6e84934ed19e Call trace: tmc_etr_get_buffer+0x30/0x80 [coresight_tmc] (P) catu_enable_hw+0xbc/0x3d0 [coresight_catu] catu_enable+0x70/0xe0 [coresight_catu] coresight_enable_path+0xb0/0x258 [coresight]
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 080ee83cc361451a7de7b5486c7f96ce454f7203 , < faa8f38f7ccb344ace2c1f364efc70e3a12d32f3 (git)
Affected: 080ee83cc361451a7de7b5486c7f96ce454f7203 , < d0c9effd82f2c19b92acd07d357fac5f392d549a (git)
Affected: 080ee83cc361451a7de7b5486c7f96ce454f7203 , < aaa5abcc9d44d2c8484f779ab46d242d774cabcb (git)
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Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-etm-perf.c",
            "drivers/hwtracing/coresight/coresight-tmc-etr.c",
            "include/linux/coresight.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "faa8f38f7ccb344ace2c1f364efc70e3a12d32f3",
              "status": "affected",
              "version": "080ee83cc361451a7de7b5486c7f96ce454f7203",
              "versionType": "git"
            },
            {
              "lessThan": "d0c9effd82f2c19b92acd07d357fac5f392d549a",
              "status": "affected",
              "version": "080ee83cc361451a7de7b5486c7f96ce454f7203",
              "versionType": "git"
            },
            {
              "lessThan": "aaa5abcc9d44d2c8484f779ab46d242d774cabcb",
              "status": "affected",
              "version": "080ee83cc361451a7de7b5486c7f96ce454f7203",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-etm-perf.c",
            "drivers/hwtracing/coresight/coresight-tmc-etr.c",
            "include/linux/coresight.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.13",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.2",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: tmc: add the handle of the event to the path\n\nThe handle is essential for retrieving the AUX_EVENT of each CPU and is\nrequired in perf mode. It has been added to the coresight_path so that\ndependent devices can access it from the path when needed.\n\nThe existing bug can be reproduced with:\nperf record -e cs_etm//k -C 0-9 dd if=/dev/zero of=/dev/null\n\nShowing an oops as follows:\nUnable to handle kernel paging request at virtual address 000f6e84934ed19e\n\nCall trace:\n tmc_etr_get_buffer+0x30/0x80 [coresight_tmc] (P)\n catu_enable_hw+0xbc/0x3d0 [coresight_catu]\n catu_enable+0x70/0xe0 [coresight_catu]\n coresight_enable_path+0xb0/0x258 [coresight]"
        }
      ],
      "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 - The vulnerability is reached locally through perf_event_open(), perf AUX-buffer mmap, and event enablement for the CoreSight ETM PMU.\nAC:L - Triggering is deterministic on an affected TMC-ETR/CATU topology and requires no race; any heap grooming needed for deeper exploitation remains attacker-controlled.\nPR:L - An unprivileged user can use a self-targeted, user-only cs_etm//u event, avoiding both perf_allow_cpu() and perf_allow_kernel(). User-namespace capabilities are unnecessary.\nUI:N - The attacker can create, map, and enable the perf event directly without action by another user.\nS:U - The vulnerable CoreSight driver and the affected kernel memory and execution context belong to the same kernel security authority.\nC:H - The coresight_path-to-perf_output_handle type confusion causes out-of-bounds heap reads and attacker-groomable pointer chasing. Successful exploitation can provide kernel-memory disclosure as part of the resulting memory-access primitive.\nI:H - Bogus etr_buf fields can program CATU translation or pass-through state incorrectly, allowing ETR DMA to target unintended physical memory and potentially corrupt kernel data or code.\nA:H - The documented trigger produces a kernel paging-request oops, which can panic the system or leave it unusable and can be invoked repeatedly."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:11:06.086Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/faa8f38f7ccb344ace2c1f364efc70e3a12d32f3"
        },
        {
          "url": "https://git.kernel.org/stable/c/d0c9effd82f2c19b92acd07d357fac5f392d549a"
        },
        {
          "url": "https://git.kernel.org/stable/c/aaa5abcc9d44d2c8484f779ab46d242d774cabcb"
        }
      ],
      "title": "coresight: tmc: add the handle of the event to the path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68370",
    "datePublished": "2025-12-24T10:32:56.149Z",
    "dateReserved": "2025-12-16T14:48:05.309Z",
    "dateUpdated": "2026-08-05T12:11:06.086Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-68370",
      "date": "2026-09-23",
      "epss": "0.00141",
      "percentile": "0.03824"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/hwtracing/coresight/coresight-etm-perf.c",
                  "drivers/hwtracing/coresight/coresight-tmc-etr.c",
                  "include/linux/coresight.h"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "faa8f38f7ccb344ace2c1f364efc70e3a12d32f3",
                    "status": "affected",
                    "version": "080ee83cc361451a7de7b5486c7f96ce454f7203",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "d0c9effd82f2c19b92acd07d357fac5f392d549a",
                    "status": "affected",
                    "version": "080ee83cc361451a7de7b5486c7f96ce454f7203",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "aaa5abcc9d44d2c8484f779ab46d242d774cabcb",
                    "status": "affected",
                    "version": "080ee83cc361451a7de7b5486c7f96ce454f7203",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/hwtracing/coresight/coresight-etm-perf.c",
                  "drivers/hwtracing/coresight/coresight-tmc-etr.c",
                  "include/linux/coresight.h"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.15"
                  },
                  {
                    "lessThan": "6.15",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.17.*",
                    "status": "unaffected",
                    "version": "6.17.13",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.2",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.19",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: tmc: add the handle of the event to the path\n\nThe handle is essential for retrieving the AUX_EVENT of each CPU and is\nrequired in perf mode. It has been added to the coresight_path so that\ndependent devices can access it from the path when needed.\n\nThe existing bug can be reproduced with:\nperf record -e cs_etm//k -C 0-9 dd if=/dev/zero of=/dev/null\n\nShowing an oops as follows:\nUnable to handle kernel paging request at virtual address 000f6e84934ed19e\n\nCall trace:\n tmc_etr_get_buffer+0x30/0x80 [coresight_tmc] (P)\n catu_enable_hw+0xbc/0x3d0 [coresight_catu]\n catu_enable+0x70/0xe0 [coresight_catu]\n coresight_enable_path+0xb0/0x258 [coresight]"
          }
        ],
        "id": "CVE-2025-68370",
        "lastModified": "2026-07-30T06:24:40.660",
        "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",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2025-12-24T11:16:00.573",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/aaa5abcc9d44d2c8484f779ab46d242d774cabcb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d0c9effd82f2c19b92acd07d357fac5f392d549a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/faa8f38f7ccb344ace2c1f364efc70e3a12d32f3"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-13T17:34:53+00:00",
      "cve": "CVE-2025-68370",
      "id": "CVE-2025-68370",
      "initial_release_date": "2025-12-24T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Coresight TMC vulnerability leads to denial of service",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68370.json",
      "version": "3"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.