Vulnerability-Lookup

CVE-2026-93157 (GCVE-0-2026-93157)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:11 – Updated: 2026-09-17 16:11

Title

hwrng: xilinx-trng - propagate timeout before any data is read

Summary

In the Linux kernel, the following vulnerability has been resolved: hwrng: xilinx-trng - propagate timeout before any data is read xtrng_readblock32() polls for 16-byte chunks but returns the number of bytes read even when the first poll times out. Its caller then treats a zero return as a short successful read, and partial reads for full 32-byte blocks can make the tail copy use a fixed block offset rather than the amount already produced. Return the poll error when no data has been read, preserve partial positive returns after some data is available, stop the generator on all collection exits, and append tail bytes at the current output count.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/62219775a07ce0bd8…
https://git.kernel.org/stable/c/bdc3b37a935f28c3e…
https://git.kernel.org/stable/c/ba088974419326daf…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 8979744aca8096ee5072798dfc1181606919b35d , < 62219775a07ce0bd8085852f3d1e2d772bf6fdec (git) Affected: 8979744aca8096ee5072798dfc1181606919b35d , < bdc3b37a935f28c3e9eb2f6e889b4644d859fb08 (git) Affected: 8979744aca8096ee5072798dfc1181606919b35d , < ba088974419326daf46c5dc03e2cf6ab6ab701f7 (git)	guessed
Linux	Linux	Affected: 6.18 Unaffected: 0 , < 6.18 (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/hw_random/xilinx-trng.c"
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          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
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              "versionType": "git"
            },
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              "status": "affected",
              "version": "8979744aca8096ee5072798dfc1181606919b35d",
              "versionType": "git"
            },
            {
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        },
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwrng: xilinx-trng - propagate timeout before any data is read\n\nxtrng_readblock32() polls for 16-byte chunks but returns the number of\nbytes read even when the first poll times out. Its caller then treats a\nzero return as a short successful read, and partial reads for full\n32-byte blocks can make the tail copy use a fixed block offset rather\nthan the amount already produced.\n\nReturn the poll error when no data has been read, preserve partial\npositive returns after some data is available, stop the generator on all\ncollection exits, and append tail bytes at the current output count."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:11:52.459Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/62219775a07ce0bd8085852f3d1e2d772bf6fdec"
        },
        {
          "url": "https://git.kernel.org/stable/c/bdc3b37a935f28c3e9eb2f6e889b4644d859fb08"
        },
        {
          "url": "https://git.kernel.org/stable/c/ba088974419326daf46c5dc03e2cf6ab6ab701f7"
        }
      ],
      "title": "hwrng: xilinx-trng - propagate timeout before any data is read",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93157",
    "datePublished": "2026-09-17T16:11:52.459Z",
    "dateReserved": "2026-09-17T16:02:15.089Z",
    "dateUpdated": "2026-09-17T16:11:52.459Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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  }
}

FKIE_CVE-2026-93157

Vulnerability from fkie_nvd - Published: 2026-09-17 17:18 - Updated: 2026-09-17 17:18

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/62219775a07ce0bd8085852f3d1e2d772bf6fdec
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ba088974419326daf46c5dc03e2cf6ab6ab701f7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bdc3b37a935f28c3e9eb2f6e889b4644d859fb08

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/hw_random/xilinx-trng.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "62219775a07ce0bd8085852f3d1e2d772bf6fdec",
              "status": "affected",
              "version": "8979744aca8096ee5072798dfc1181606919b35d",
              "versionType": "git"
            },
            {
              "lessThan": "bdc3b37a935f28c3e9eb2f6e889b4644d859fb08",
              "status": "affected",
              "version": "8979744aca8096ee5072798dfc1181606919b35d",
              "versionType": "git"
            },
            {
              "lessThan": "ba088974419326daf46c5dc03e2cf6ab6ab701f7",
              "status": "affected",
              "version": "8979744aca8096ee5072798dfc1181606919b35d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/hw_random/xilinx-trng.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "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\nhwrng: xilinx-trng - propagate timeout before any data is read\n\nxtrng_readblock32() polls for 16-byte chunks but returns the number of\nbytes read even when the first poll times out. Its caller then treats a\nzero return as a short successful read, and partial reads for full\n32-byte blocks can make the tail copy use a fixed block offset rather\nthan the amount already produced.\n\nReturn the poll error when no data has been read, preserve partial\npositive returns after some data is available, stop the generator on all\ncollection exits, and append tail bytes at the current output count."
    }
  ],
  "id": "CVE-2026-93157",
  "lastModified": "2026-09-17T17:18:11.040",
  "metrics": {},
  "published": "2026-09-17T17:18:11.040",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-86X5-PHCH-GQRH

Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32

Details

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

hwrng: xilinx-trng - propagate timeout before any data is read

xtrng_readblock32() polls for 16-byte chunks but returns the number of bytes read even when the first poll times out. Its caller then treats a zero return as a short successful read, and partial reads for full 32-byte blocks can make the tail copy use a fixed block offset rather than the amount already produced.

Return the poll error when no data has been read, preserve partial positive returns after some data is available, stop the generator on all collection exits, and append tail bytes at the current output count.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-93157"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:18:11Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwrng: xilinx-trng - propagate timeout before any data is read\n\nxtrng_readblock32() polls for 16-byte chunks but returns the number of\nbytes read even when the first poll times out. Its caller then treats a\nzero return as a short successful read, and partial reads for full\n32-byte blocks can make the tail copy use a fixed block offset rather\nthan the amount already produced.\n\nReturn the poll error when no data has been read, preserve partial\npositive returns after some data is available, stop the generator on all\ncollection exits, and append tail bytes at the current output count.",
  "id": "GHSA-86x5-phch-gqrh",
  "modified": "2026-09-17T18:32:12Z",
  "published": "2026-09-17T18:32:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93157"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/62219775a07ce0bd8085852f3d1e2d772bf6fdec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba088974419326daf46c5dc03e2cf6ab6ab701f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bdc3b37a935f28c3e9eb2f6e889b4644d859fb08"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2026-93157 (GCVE-0-2026-93157)

FKIE_CVE-2026-93157

GHSA-86X5-PHCH-GQRH

Tags

Sightings

Nomenclature

Related by attack behaviour