GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2025-71203 (GCVE-0-2025-71203)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-05-11 21:56
VLAI
Title
riscv: Sanitize syscall table indexing under speculation
Summary
In the Linux kernel, the following vulnerability has been resolved: riscv: Sanitize syscall table indexing under speculation The syscall number is a user-controlled value used to index into the syscall table. Use array_index_nospec() to clamp this value after the bounds check to prevent speculative out-of-bounds access and subsequent data leakage via cache side channels.
Severity
7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f0bddf50586da81360627a772be0e355b62f071e , < 33743ec6679aa364ee19d1afbaa50593e9e6e443 (git)
Affected: f0bddf50586da81360627a772be0e355b62f071e , < c45848936ebdb4fcab92f8c39510db83c16d0239 (git)
Affected: f0bddf50586da81360627a772be0e355b62f071e , < 8b44e753795107a22ba31495686e83f4aca48f36 (git)
Affected: f0bddf50586da81360627a772be0e355b62f071e , < 25fd7ee7bf58ac3ec7be3c9f82ceff153451946c (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.70 , ≤ 6.12.* (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/riscv/kernel/traps.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "33743ec6679aa364ee19d1afbaa50593e9e6e443",
              "status": "affected",
              "version": "f0bddf50586da81360627a772be0e355b62f071e",
              "versionType": "git"
            },
            {
              "lessThan": "c45848936ebdb4fcab92f8c39510db83c16d0239",
              "status": "affected",
              "version": "f0bddf50586da81360627a772be0e355b62f071e",
              "versionType": "git"
            },
            {
              "lessThan": "8b44e753795107a22ba31495686e83f4aca48f36",
              "status": "affected",
              "version": "f0bddf50586da81360627a772be0e355b62f071e",
              "versionType": "git"
            },
            {
              "lessThan": "25fd7ee7bf58ac3ec7be3c9f82ceff153451946c",
              "status": "affected",
              "version": "f0bddf50586da81360627a772be0e355b62f071e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/riscv/kernel/traps.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.70",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.130",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.70",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.10",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: Sanitize syscall table indexing under speculation\n\nThe syscall number is a user-controlled value used to index into the\nsyscall table. Use array_index_nospec() to clamp this value after the\nbounds check to prevent speculative out-of-bounds access and subsequent\ndata leakage via cache side channels."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:56:39.295Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/33743ec6679aa364ee19d1afbaa50593e9e6e443"
        },
        {
          "url": "https://git.kernel.org/stable/c/c45848936ebdb4fcab92f8c39510db83c16d0239"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b44e753795107a22ba31495686e83f4aca48f36"
        },
        {
          "url": "https://git.kernel.org/stable/c/25fd7ee7bf58ac3ec7be3c9f82ceff153451946c"
        }
      ],
      "title": "riscv: Sanitize syscall table indexing under speculation",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71203",
    "datePublished": "2026-02-14T16:27:02.513Z",
    "dateReserved": "2026-01-31T11:36:51.194Z",
    "dateUpdated": "2026-05-11T21:56:39.295Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-71203",
      "date": "2026-09-16",
      "epss": "0.00131",
      "percentile": "0.03087"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71203\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-14T17:15:54.110\",\"lastModified\":\"2026-06-17T10:03:52.770\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nriscv: Sanitize syscall table indexing under speculation\\n\\nThe syscall number is a user-controlled value used to index into the\\nsyscall table. Use array_index_nospec() to clamp this value after the\\nbounds check to prevent speculative out-of-bounds access and subsequent\\ndata leakage via cache side channels.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nriscv: Sanitizar la indexaci\u00f3n de la tabla de llamadas al sistema bajo especulaci\u00f3n\\n\\nEl n\u00famero de llamada al sistema es un valor controlado por el usuario utilizado para indexar la tabla de llamadas al sistema. Usar array_index_nospec() para restringir este valor despu\u00e9s de la comprobaci\u00f3n de l\u00edmites para prevenir el acceso especulativo fuera de l\u00edmites y la posterior fuga de datos a trav\u00e9s de canales laterales de cach\u00e9.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/riscv/kernel/traps.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f0bddf50586da81360627a772be0e355b62f071e\",\"lessThan\":\"33743ec6679aa364ee19d1afbaa50593e9e6e443\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bddf50586da81360627a772be0e355b62f071e\",\"lessThan\":\"c45848936ebdb4fcab92f8c39510db83c16d0239\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bddf50586da81360627a772be0e355b62f071e\",\"lessThan\":\"8b44e753795107a22ba31495686e83f4aca48f36\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bddf50586da81360627a772be0e355b62f071e\",\"lessThan\":\"25fd7ee7bf58ac3ec7be3c9f82ceff153451946c\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/riscv/kernel/traps.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.130\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.70\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.10\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-129\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4\",\"versionEndExcluding\":\"6.12.70\",\"matchCriteriaId\":\"4D8E837D-015F-4570-A0A6-48794A7336F1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.10\",\"matchCriteriaId\":\"7156C23F-009E-4D05-838C-A2DA417B5B8D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/25fd7ee7bf58ac3ec7be3c9f82ceff153451946c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/33743ec6679aa364ee19d1afbaa50593e9e6e443\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8b44e753795107a22ba31495686e83f4aca48f36\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c45848936ebdb4fcab92f8c39510db83c16d0239\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T11:39:12+00:00",
      "cve": "CVE-2025-71203",
      "id": "CVE-2025-71203",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: riscv: Sanitize syscall table indexing under speculation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71203.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-30T01:40:27Z",
      "cve": "CVE-2025-71203",
      "id": "CVE-2025-71203",
      "initial_release_date": "2026-02-16T00:27:16Z",
      "product_status:known_not_affected": "441",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-71203",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-71203.json",
      "version": "12"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.