CVE-2021-47317 (GCVE-0-2021-47317)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:35 – Updated: 2026-05-11 13:52
VLAI
Title
powerpc/bpf: Fix detecting BPF atomic instructions
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/bpf: Fix detecting BPF atomic instructions Commit 91c960b0056672 ("bpf: Rename BPF_XADD and prepare to encode other atomics in .imm") converted BPF_XADD to BPF_ATOMIC and added a way to distinguish instructions based on the immediate field. Existing JIT implementations were updated to check for the immediate field and to reject programs utilizing anything more than BPF_ADD (such as BPF_FETCH) in the immediate field. However, the check added to powerpc64 JIT did not look at the correct BPF instruction. Due to this, such programs would be accepted and incorrectly JIT'ed resulting in soft lockups, as seen with the atomic bounds test. Fix this by looking at the correct immediate value.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 91c960b0056672e74627776655c926388350fa30 , < 7284dab07e4d51d453cc42851fae9ec4fac6ef2f (git)
Affected: 91c960b0056672e74627776655c926388350fa30 , < 0d435b6d94b05dcfd836d758a63145aa566618e2 (git)
Affected: 91c960b0056672e74627776655c926388350fa30 , < 419ac821766cbdb9fd85872bb3f1a589df05c94c (git)
Create a notification for this product.
Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.12.19 , ≤ 5.12.* (semver)
Unaffected: 5.13.4 , ≤ 5.13.* (semver)
Unaffected: 5.14 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:32:08.533Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/7284dab07e4d51d453cc42851fae9ec4fac6ef2f"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0d435b6d94b05dcfd836d758a63145aa566618e2"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/419ac821766cbdb9fd85872bb3f1a589df05c94c"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47317",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:39:12.722343Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:53.176Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/net/bpf_jit_comp64.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7284dab07e4d51d453cc42851fae9ec4fac6ef2f",
              "status": "affected",
              "version": "91c960b0056672e74627776655c926388350fa30",
              "versionType": "git"
            },
            {
              "lessThan": "0d435b6d94b05dcfd836d758a63145aa566618e2",
              "status": "affected",
              "version": "91c960b0056672e74627776655c926388350fa30",
              "versionType": "git"
            },
            {
              "lessThan": "419ac821766cbdb9fd85872bb3f1a589df05c94c",
              "status": "affected",
              "version": "91c960b0056672e74627776655c926388350fa30",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/net/bpf_jit_comp64.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.13.*",
              "status": "unaffected",
              "version": "5.13.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.12.19",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13.4",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.14",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/bpf: Fix detecting BPF atomic instructions\n\nCommit 91c960b0056672 (\"bpf: Rename BPF_XADD and prepare to encode other\natomics in .imm\") converted BPF_XADD to BPF_ATOMIC and added a way to\ndistinguish instructions based on the immediate field. Existing JIT\nimplementations were updated to check for the immediate field and to\nreject programs utilizing anything more than BPF_ADD (such as BPF_FETCH)\nin the immediate field.\n\nHowever, the check added to powerpc64 JIT did not look at the correct\nBPF instruction. Due to this, such programs would be accepted and\nincorrectly JIT\u0027ed resulting in soft lockups, as seen with the atomic\nbounds test. Fix this by looking at the correct immediate value."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T13:52:09.601Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7284dab07e4d51d453cc42851fae9ec4fac6ef2f"
        },
        {
          "url": "https://git.kernel.org/stable/c/0d435b6d94b05dcfd836d758a63145aa566618e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/419ac821766cbdb9fd85872bb3f1a589df05c94c"
        }
      ],
      "title": "powerpc/bpf: Fix detecting BPF atomic instructions",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47317",
    "datePublished": "2024-05-21T14:35:33.212Z",
    "dateReserved": "2024-05-21T14:28:16.973Z",
    "dateUpdated": "2026-05-11T13:52:09.601Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-47317",
      "date": "2026-07-15",
      "epss": "0.00174",
      "percentile": "0.07043"
    },
    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/bpf: Fix detecting BPF atomic instructions\\n\\nCommit 91c960b0056672 (\\\"bpf: Rename BPF_XADD and prepare to encode other\\natomics in .imm\\\") converted BPF_XADD to BPF_ATOMIC and added a way to\\ndistinguish instructions based on the immediate field. Existing JIT\\nimplementations were updated to check for the immediate field and to\\nreject programs utilizing anything more than BPF_ADD (such as BPF_FETCH)\\nin the immediate field.\\n\\nHowever, the check added to powerpc64 JIT did not look at the correct\\nBPF instruction. Due to this, such programs would be accepted and\\nincorrectly JIT\u0027ed resulting in soft lockups, as seen with the atomic\\nbounds test. Fix this by looking at the correct immediate value.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: powerpc/bpf: Correcci\\u00f3n de la detecci\\u00f3n de instrucciones at\\u00f3micas BPF. La confirmaci\\u00f3n 91c960b0056672 (\\\"bpf: Renombrar BPF_XADD y prepararse para codificar otros \\u00e1tomos en .imm\\\") convirti\\u00f3 BPF_XADD a BPF_ATOMIC y agreg\\u00f3 una forma de distinguir instrucciones basadas en el campo inmediato. Las implementaciones JIT existentes se actualizaron para verificar el campo inmediato y rechazar programas que utilicen algo m\\u00e1s que BPF_ADD (como BPF_FETCH) en el campo inmediato. Sin embargo, la verificaci\\u00f3n agregada a powerpc64 JIT no analiz\\u00f3 la instrucci\\u00f3n BPF correcta. Debido a esto, dichos programas ser\\u00edan aceptados y sometidos a JIT incorrectamente, lo que provocar\\u00eda bloqueos suaves, como se ve con la prueba de l\\u00edmites at\\u00f3micos. Solucione este problema observando el valor inmediato correcto.\"}]",
      "id": "CVE-2021-47317",
      "lastModified": "2024-11-21T06:35:52.117",
      "published": "2024-05-21T15:15:19.007",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/0d435b6d94b05dcfd836d758a63145aa566618e2\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/419ac821766cbdb9fd85872bb3f1a589df05c94c\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/7284dab07e4d51d453cc42851fae9ec4fac6ef2f\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/0d435b6d94b05dcfd836d758a63145aa566618e2\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/419ac821766cbdb9fd85872bb3f1a589df05c94c\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/7284dab07e4d51d453cc42851fae9ec4fac6ef2f\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47317\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:19.007\",\"lastModified\":\"2026-06-17T04:17:10.853\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/bpf: Fix detecting BPF atomic instructions\\n\\nCommit 91c960b0056672 (\\\"bpf: Rename BPF_XADD and prepare to encode other\\natomics in .imm\\\") converted BPF_XADD to BPF_ATOMIC and added a way to\\ndistinguish instructions based on the immediate field. Existing JIT\\nimplementations were updated to check for the immediate field and to\\nreject programs utilizing anything more than BPF_ADD (such as BPF_FETCH)\\nin the immediate field.\\n\\nHowever, the check added to powerpc64 JIT did not look at the correct\\nBPF instruction. Due to this, such programs would be accepted and\\nincorrectly JIT\u0027ed resulting in soft lockups, as seen with the atomic\\nbounds test. Fix this by looking at the correct immediate value.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: powerpc/bpf: Correcci\u00f3n de la detecci\u00f3n de instrucciones at\u00f3micas BPF. La confirmaci\u00f3n 91c960b0056672 (\\\"bpf: Renombrar BPF_XADD y prepararse para codificar otros \u00e1tomos en .imm\\\") convirti\u00f3 BPF_XADD a BPF_ATOMIC y agreg\u00f3 una forma de distinguir instrucciones basadas en el campo inmediato. Las implementaciones JIT existentes se actualizaron para verificar el campo inmediato y rechazar programas que utilicen algo m\u00e1s que BPF_ADD (como BPF_FETCH) en el campo inmediato. Sin embargo, la verificaci\u00f3n agregada a powerpc64 JIT no analiz\u00f3 la instrucci\u00f3n BPF correcta. Debido a esto, dichos programas ser\u00edan aceptados y sometidos a JIT incorrectamente, lo que provocar\u00eda bloqueos suaves, como se ve con la prueba de l\u00edmites at\u00f3micos. Solucione este problema observando el valor inmediato correcto.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/powerpc/net/bpf_jit_comp64.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"91c960b0056672e74627776655c926388350fa30\",\"lessThan\":\"7284dab07e4d51d453cc42851fae9ec4fac6ef2f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"91c960b0056672e74627776655c926388350fa30\",\"lessThan\":\"0d435b6d94b05dcfd836d758a63145aa566618e2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"91c960b0056672e74627776655c926388350fa30\",\"lessThan\":\"419ac821766cbdb9fd85872bb3f1a589df05c94c\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/powerpc/net/bpf_jit_comp64.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.12.19\",\"lessThanOrEqual\":\"5.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.13.4\",\"lessThanOrEqual\":\"5.13.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.14\",\"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:L/PR:L/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":3.3,\"baseSeverity\":\"LOW\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":1.8,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T15:39:12.722343Z\",\"id\":\"CVE-2021-47317\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12\",\"versionEndExcluding\":\"5.12.19\",\"matchCriteriaId\":\"5033632E-A8AC-4311-894E-37B22F30BC28\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.13\",\"versionEndExcluding\":\"5.13.4\",\"matchCriteriaId\":\"F93FA3CC-0C79-410B-A7D7-245C2AA0723A\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0d435b6d94b05dcfd836d758a63145aa566618e2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/419ac821766cbdb9fd85872bb3f1a589df05c94c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7284dab07e4d51d453cc42851fae9ec4fac6ef2f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0d435b6d94b05dcfd836d758a63145aa566618e2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/419ac821766cbdb9fd85872bb3f1a589df05c94c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7284dab07e4d51d453cc42851fae9ec4fac6ef2f\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T11:44:28+00:00",
      "cve": "CVE-2021-47317",
      "id": "CVE-2021-47317",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_affected": "78",
      "product_status:known_not_affected": "120",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: powerpc/bpf: Fix detecting BPF atomic instructions",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47317.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/7284dab07e4d51d453cc42851fae9ec4fac6ef2f\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/0d435b6d94b05dcfd836d758a63145aa566618e2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/419ac821766cbdb9fd85872bb3f1a589df05c94c\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:08.533Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47317\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:39:12.722343Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:19.424Z\"}}], \"cna\": {\"title\": \"powerpc/bpf: Fix detecting BPF atomic instructions\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"91c960b0056672e74627776655c926388350fa30\", \"lessThan\": \"7284dab07e4d51d453cc42851fae9ec4fac6ef2f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"91c960b0056672e74627776655c926388350fa30\", \"lessThan\": \"0d435b6d94b05dcfd836d758a63145aa566618e2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"91c960b0056672e74627776655c926388350fa30\", \"lessThan\": \"419ac821766cbdb9fd85872bb3f1a589df05c94c\", \"versionType\": \"git\"}], \"programFiles\": [\"arch/powerpc/net/bpf_jit_comp64.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.12.19\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.13.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"arch/powerpc/net/bpf_jit_comp64.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/7284dab07e4d51d453cc42851fae9ec4fac6ef2f\"}, {\"url\": \"https://git.kernel.org/stable/c/0d435b6d94b05dcfd836d758a63145aa566618e2\"}, {\"url\": \"https://git.kernel.org/stable/c/419ac821766cbdb9fd85872bb3f1a589df05c94c\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/bpf: Fix detecting BPF atomic instructions\\n\\nCommit 91c960b0056672 (\\\"bpf: Rename BPF_XADD and prepare to encode other\\natomics in .imm\\\") converted BPF_XADD to BPF_ATOMIC and added a way to\\ndistinguish instructions based on the immediate field. Existing JIT\\nimplementations were updated to check for the immediate field and to\\nreject programs utilizing anything more than BPF_ADD (such as BPF_FETCH)\\nin the immediate field.\\n\\nHowever, the check added to powerpc64 JIT did not look at the correct\\nBPF instruction. Due to this, such programs would be accepted and\\nincorrectly JIT\u0027ed resulting in soft lockups, as seen with the atomic\\nbounds test. Fix this by looking at the correct immediate value.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.19\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13.4\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14\", \"versionStartIncluding\": \"5.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T13:52:09.601Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47317\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T13:52:09.601Z\", \"dateReserved\": \"2024-05-21T14:28:16.973Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:35:33.212Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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.