Vulnerability-Lookup

GHSA-M6HV-9H66-MMJV

Vulnerability from github – Published: 2026-08-06 09:30 – Updated: 2026-08-06 09:30

Details

In the Linux kernel, the following vulnerability has been resolved:

riscv: mm: Unconditionally sfence.vma for spurious fault

Svvptc does not guarantee that it's safe to just return here. Since we have already cleared our bit, if, theoretically, the bounded timeframe for the accessed page to become valid still hasn't happened after sret, we could fault again and actually crash.

Hopefully, these spurious faults should be rare enough that this is an acceptable slowdown.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64592"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-06T08:16:34Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: mm: Unconditionally sfence.vma for spurious fault\n\nSvvptc does not guarantee that it\u0027s safe to just return here. Since we\nhave already cleared our bit, if, theoretically, the bounded timeframe\nfor the accessed page to become valid still hasn\u0027t happened after sret,\nwe could fault again and actually crash.\n\nHopefully, these spurious faults should be rare enough that this is an\nacceptable slowdown.",
  "id": "GHSA-m6hv-9h66-mmjv",
  "modified": "2026-08-06T09:30:33Z",
  "published": "2026-08-06T09:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64592"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b2c6b56a9fa0dcbef461039937de22b1cbecc7d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d730cab96e6b75e4a07c4baf37294ebc07f795e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4df24702bfc3cd2bed7746b94dc6139a3fa5428"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ede985ff4b569ed2454024f8bb107a6729fe08aa"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-64592 (GCVE-0-2026-64592)

Vulnerability from cvelistv5 – Published: 2026-08-06 07:13 – Updated: 2026-08-06 07:13

Title

riscv: mm: Unconditionally sfence.vma for spurious fault

Summary

In the Linux kernel, the following vulnerability has been resolved: riscv: mm: Unconditionally sfence.vma for spurious fault Svvptc does not guarantee that it's safe to just return here. Since we have already cleared our bit, if, theoretically, the bounded timeframe for the accessed page to become valid still hasn't happened after sret, we could fault again and actually crash. Hopefully, these spurious faults should be rare enough that this is an acceptable slowdown.

Severity

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/c4df24702bfc3cd2b…
https://git.kernel.org/stable/c/4d730cab96e6b75e4…
https://git.kernel.org/stable/c/ede985ff4b569ed24…
https://git.kernel.org/stable/c/1b2c6b56a9fa0dcbe…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 503638e0babf364061bc50fca5103b00a56cc50a , < c4df24702bfc3cd2bed7746b94dc6139a3fa5428 (git) Affected: 503638e0babf364061bc50fca5103b00a56cc50a , < 4d730cab96e6b75e4a07c4baf37294ebc07f795e (git) Affected: 503638e0babf364061bc50fca5103b00a56cc50a , < ede985ff4b569ed2454024f8bb107a6729fe08aa (git) Affected: 503638e0babf364061bc50fca5103b00a56cc50a , < 1b2c6b56a9fa0dcbef461039937de22b1cbecc7d (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/riscv/kernel/entry.S"
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              "versionType": "git"
            },
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              "version": "503638e0babf364061bc50fca5103b00a56cc50a",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: mm: Unconditionally sfence.vma for spurious fault\n\nSvvptc does not guarantee that it\u0027s safe to just return here. Since we\nhave already cleared our bit, if, theoretically, the bounded timeframe\nfor the accessed page to become valid still hasn\u0027t happened after sret,\nwe could fault again and actually crash.\n\nHopefully, these spurious faults should be rare enough that this is an\nacceptable slowdown."
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        "dateUpdated": "2026-08-06T07:13:49.098Z",
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    "datePublished": "2026-08-06T07:13:49.098Z",
    "dateReserved": "2026-07-19T15:36:31.798Z",
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

GHSA-M6HV-9H66-MMJV

CVE-2026-64592 (GCVE-0-2026-64592)

Tags

Sightings

Nomenclature