Vulnerability-Lookup

CVE-2026-92517 (GCVE-0-2026-92517)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:10 – Updated: 2026-09-17 16:10

Title

bpf, riscv: Fix extable handling for arena load_acquire

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf, riscv: Fix extable handling for arena load_acquire emit_atomic_ld_st() returns 1 to have build_body() skip the zext after a sub-word load_acquire. The caller does "ret = ret ?: add_exception_handler(...)", which skips add_exception_handler() on any non-zero ret, so the extable entry is missing and a faulting PROBE_ATOMIC load_acquire oopses. REG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still thinks the load overwrote it, so a program can leak it through a map. Check ret >= 0 before calling add_exception_handler(), and pass rd for LOAD_ACQ so the fault zeroes rd like a PROBE_MEM load. Return ret unchanged for the zext skip.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/26d9496c826586338…
https://git.kernel.org/stable/c/08fe2eaa609180c1b…
https://git.kernel.org/stable/c/5eb8921371c6fd117…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: fb7cefabae8117c203155ef169a386bec43bbba9 , < 26d9496c826586338d1b8c27edfec4a19a89f462 (git) Affected: fb7cefabae8117c203155ef169a386bec43bbba9 , < 08fe2eaa609180c1baeb76c2629a9c82263b0427 (git) Affected: fb7cefabae8117c203155ef169a386bec43bbba9 , < 5eb8921371c6fd117d4a328b6053dfda38707df8 (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": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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              "version": "6.18"
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              "version": "0",
              "versionType": "semver"
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              "version": "7.2.6",
              "versionType": "semver"
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              "version": "7.3-rc1",
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            }
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        }
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, riscv: Fix extable handling for arena load_acquire\n\nemit_atomic_ld_st() returns 1 to have build_body() skip the zext after\na sub-word load_acquire. The caller does \"ret = ret ?:\nadd_exception_handler(...)\", which skips add_exception_handler() on any\nnon-zero ret, so the extable entry is missing and a faulting\nPROBE_ATOMIC load_acquire oopses.\n\nREG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still\nthinks the load overwrote it, so a program can leak it through a map.\n\nCheck ret \u003e= 0 before calling add_exception_handler(), and pass rd for\nLOAD_ACQ so the fault zeroes rd like a PROBE_MEM load. Return ret\nunchanged for the zext skip."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:10:25.482Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/26d9496c826586338d1b8c27edfec4a19a89f462"
        },
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          "url": "https://git.kernel.org/stable/c/08fe2eaa609180c1baeb76c2629a9c82263b0427"
        },
        {
          "url": "https://git.kernel.org/stable/c/5eb8921371c6fd117d4a328b6053dfda38707df8"
        }
      ],
      "title": "bpf, riscv: Fix extable handling for arena load_acquire",
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    }
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-92517",
    "datePublished": "2026-09-17T16:10:25.482Z",
    "dateReserved": "2026-09-16T12:21:13.873Z",
    "dateUpdated": "2026-09-17T16:10:25.482Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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    "nvd": {
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        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "arch/riscv/net/bpf_jit_comp64.c"
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                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
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                    "versionType": "git"
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                  {
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                    "versionType": "git"
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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"
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                    "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\nbpf, riscv: Fix extable handling for arena load_acquire\n\nemit_atomic_ld_st() returns 1 to have build_body() skip the zext after\na sub-word load_acquire. The caller does \"ret = ret ?:\nadd_exception_handler(...)\", which skips add_exception_handler() on any\nnon-zero ret, so the extable entry is missing and a faulting\nPROBE_ATOMIC load_acquire oopses.\n\nREG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still\nthinks the load overwrote it, so a program can leak it through a map.\n\nCheck ret \u003e= 0 before calling add_exception_handler(), and pass rd for\nLOAD_ACQ so the fault zeroes rd like a PROBE_MEM load. Return ret\nunchanged for the zext skip."
          }
        ],
        "id": "CVE-2026-92517",
        "lastModified": "2026-09-17T17:17:54.587",
        "metrics": {},
        "published": "2026-09-17T17:17:54.587",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/08fe2eaa609180c1baeb76c2629a9c82263b0427"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          },
          {
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            "url": "https://git.kernel.org/stable/c/5eb8921371c6fd117d4a328b6053dfda38707df8"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-18T00:13:19Z",
      "cve": "CVE-2026-92517",
      "id": "CVE-2026-92517",
      "initial_release_date": "2026-09-18T00:13:19Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-92517",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-92517.json",
      "version": "2"
    }
  }
}

FKIE_CVE-2026-92517

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

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/08fe2eaa609180c1baeb76c2629a9c82263b0427
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/26d9496c826586338d1b8c27edfec4a19a89f462
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5eb8921371c6fd117d4a328b6053dfda38707df8

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/riscv/net/bpf_jit_comp64.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "26d9496c826586338d1b8c27edfec4a19a89f462",
              "status": "affected",
              "version": "fb7cefabae8117c203155ef169a386bec43bbba9",
              "versionType": "git"
            },
            {
              "lessThan": "08fe2eaa609180c1baeb76c2629a9c82263b0427",
              "status": "affected",
              "version": "fb7cefabae8117c203155ef169a386bec43bbba9",
              "versionType": "git"
            },
            {
              "lessThan": "5eb8921371c6fd117d4a328b6053dfda38707df8",
              "status": "affected",
              "version": "fb7cefabae8117c203155ef169a386bec43bbba9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/riscv/net/bpf_jit_comp64.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\nbpf, riscv: Fix extable handling for arena load_acquire\n\nemit_atomic_ld_st() returns 1 to have build_body() skip the zext after\na sub-word load_acquire. The caller does \"ret = ret ?:\nadd_exception_handler(...)\", which skips add_exception_handler() on any\nnon-zero ret, so the extable entry is missing and a faulting\nPROBE_ATOMIC load_acquire oopses.\n\nREG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still\nthinks the load overwrote it, so a program can leak it through a map.\n\nCheck ret \u003e= 0 before calling add_exception_handler(), and pass rd for\nLOAD_ACQ so the fault zeroes rd like a PROBE_MEM load. Return ret\nunchanged for the zext skip."
    }
  ],
  "id": "CVE-2026-92517",
  "lastModified": "2026-09-17T17:17:54.587",
  "metrics": {},
  "published": "2026-09-17T17:17:54.587",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/08fe2eaa609180c1baeb76c2629a9c82263b0427"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/26d9496c826586338d1b8c27edfec4a19a89f462"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5eb8921371c6fd117d4a328b6053dfda38707df8"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-92R6-5JJC-JV43

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:

bpf, riscv: Fix extable handling for arena load_acquire

emit_atomic_ld_st() returns 1 to have build_body() skip the zext after a sub-word load_acquire. The caller does "ret = ret ?: add_exception_handler(...)", which skips add_exception_handler() on any non-zero ret, so the extable entry is missing and a faulting PROBE_ATOMIC load_acquire oopses.

REG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still thinks the load overwrote it, so a program can leak it through a map.

Check ret >= 0 before calling add_exception_handler(), and pass rd for LOAD_ACQ so the fault zeroes rd like a PROBE_MEM load. Return ret unchanged for the zext skip.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-92517"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:54Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, riscv: Fix extable handling for arena load_acquire\n\nemit_atomic_ld_st() returns 1 to have build_body() skip the zext after\na sub-word load_acquire. The caller does \"ret = ret ?:\nadd_exception_handler(...)\", which skips add_exception_handler() on any\nnon-zero ret, so the extable entry is missing and a faulting\nPROBE_ATOMIC load_acquire oopses.\n\nREG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still\nthinks the load overwrote it, so a program can leak it through a map.\n\nCheck ret \u003e= 0 before calling add_exception_handler(), and pass rd for\nLOAD_ACQ so the fault zeroes rd like a PROBE_MEM load. Return ret\nunchanged for the zext skip.",
  "id": "GHSA-92r6-5jjc-jv43",
  "modified": "2026-09-17T18:32:07Z",
  "published": "2026-09-17T18:32:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-92517"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08fe2eaa609180c1baeb76c2629a9c82263b0427"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26d9496c826586338d1b8c27edfec4a19a89f462"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5eb8921371c6fd117d4a328b6053dfda38707df8"
    }
  ],
  "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-2026-92517 (GCVE-0-2026-92517)

FKIE_CVE-2026-92517

GHSA-92R6-5JJC-JV43

Tags

Sightings

Nomenclature

Related by attack behaviour