FKIE_CVE-2026-97499

Vulnerability from fkie_nvd - Published: 2026-09-24 17:17 - Updated: 2026-09-24 17:17
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f4cb08f30011b7625a4fba668fa5c36da5e6637
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f37bc31447c0ddafedb25e3c4a4f4e2284034247
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "f37bc31447c0ddafedb25e3c4a4f4e2284034247",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "6.18.53",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "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": [
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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: 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)."
    }
  ],
  "id": "CVE-2026-97499",
  "lastModified": "2026-09-24T17:17:27.630",
  "metrics": {},
  "published": "2026-09-24T17:17:27.630",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0f4cb08f30011b7625a4fba668fa5c36da5e6637"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f37bc31447c0ddafedb25e3c4a4f4e2284034247"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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