CVE-2026-97499 (GCVE-0-2026-97499)
Vulnerability from cvelistv5
Published
2026-09-24 16:04
Modified
2026-09-28 05:30
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: coresight: perf: Retrieve path and source from event data ETM perf callbacks currently use the per-CPU csdev_src pointer, which can race with updates during device registration and unregistration. The AUX setup already builds and stores the path in the event data. Use this path to retrieve the source instead of csdev_src to avoid the race. Export coresight_get_source() and add etm_event_get_ctxt_path() to retrieve the context's path and its source with READ_ONCE() / WRITE_ONCE() accessors. Give the comments to explain why this approach is safe when pause or resume callbacks preempt the disable callback (e.g. via NMI).
References
Impacted products
Vendor Product Version
Linux Linux Version: 0bcbf2e30ff2271b54f54c8697a185f7d86ec6e4
Version: 0bcbf2e30ff2271b54f54c8697a185f7d86ec6e4
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-core.c",
            "drivers/hwtracing/coresight/coresight-etm-perf.c",
            "drivers/hwtracing/coresight/coresight-priv.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0f4cb08f30011b7625a4fba668fa5c36da5e6637",
              "status": "affected",
              "version": "0bcbf2e30ff2271b54f54c8697a185f7d86ec6e4",
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-core.c",
            "drivers/hwtracing/coresight/coresight-etm-perf.c",
            "drivers/hwtracing/coresight/coresight-priv.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.6"
            },
            {
              "lessThan": "4.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: perf: Retrieve path and source from event data\n\nETM perf callbacks currently use the per-CPU csdev_src pointer, which\ncan race with updates during device registration and unregistration.\n\nThe AUX setup already builds and stores the path in the event data.\nUse this path to retrieve the source instead of csdev_src to avoid\nthe race.\n\nExport coresight_get_source() and add etm_event_get_ctxt_path() to\nretrieve the context\u0027s path and its source with READ_ONCE() /\nWRITE_ONCE() accessors. Give the comments to explain why this\napproach is safe when pause or resume callbacks preempt the disable\ncallback (e.g. via NMI)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-28T05:30:32.658Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0f4cb08f30011b7625a4fba668fa5c36da5e6637"
        },
        {
          "url": "https://git.kernel.org/stable/c/f37bc31447c0ddafedb25e3c4a4f4e2284034247"
        }
      ],
      "title": "coresight: perf: Retrieve path and source from event data",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97499",
    "datePublished": "2026-09-24T16:04:46.252Z",
    "dateReserved": "2026-09-24T16:01:01.151Z",
    "dateUpdated": "2026-09-28T05:30:32.658Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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