GHSA-656W-9GG9-4HHP
Vulnerability from github – Published: 2026-09-24 18:31 – Updated: 2026-09-24 18:31In 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).
{
"affected": [],
"aliases": [
"CVE-2026-97499"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-24T17:17:27Z",
"severity": null
},
"details": "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": "GHSA-656w-9gg9-4hhp",
"modified": "2026-09-24T18:31:35Z",
"published": "2026-09-24T18:31:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97499"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0f4cb08f30011b7625a4fba668fa5c36da5e6637"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f37bc31447c0ddafedb25e3c4a4f4e2284034247"
}
],
"schema_version": "1.4.0",
"severity": []
}
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Sightings
| Author | Source | Type | Date | Other |
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Nomenclature
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- Published Proof of Concept: A public proof of concept is available for this vulnerability.
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
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