FKIE_CVE-2021-47297

Vulnerability from fkie_nvd - Published: 2024-05-21 15:15 - Updated: 2026-06-17 04:17
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: fix uninit-value in caif_seqpkt_sendmsg When nr_segs equal to zero in iovec_from_user, the object msg->msg_iter.iov is uninit stack memory in caif_seqpkt_sendmsg which is defined in ___sys_sendmsg. So we cann't just judge msg->msg_iter.iov->base directlly. We can use nr_segs to judge msg in caif_seqpkt_sendmsg whether has data buffers. ===================================================== BUG: KMSAN: uninit-value in caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmmsg+0x808/0xc90 net/socket.c:2480 __compat_sys_sendmmsg net/compat.c:656 [inline]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaffPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3dbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaffPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3dbPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843aPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.14
linux linux_kernel 5.14
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/caif/caif_socket.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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            },
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              "status": "affected",
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              "versionType": "git"
            },
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            },
            {
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/caif/caif_socket.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.35"
            },
            {
              "lessThan": "2.6.35",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.4.*",
              "status": "unaffected",
              "version": "4.4.277",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.277",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.241",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.199",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.13.*",
              "status": "unaffected",
              "version": "5.13.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4FB2F818-1B70-47BD-A7A3-CE857E7DD8B9",
              "versionEndExcluding": "4.4.277",
              "versionStartIncluding": "2.6.35",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B543C082-5612-489A-A957-B7F2B8822025",
              "versionEndExcluding": "4.9.277",
              "versionStartIncluding": "4.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6A796929-CDBE-45AF-BD44-F357F64AFFCA",
              "versionEndExcluding": "4.14.241",
              "versionStartIncluding": "4.10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D1C5B0E1-06E7-4615-AA17-02585202D86E",
              "versionEndExcluding": "4.19.199",
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              "vulnerable": true
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E1FCD98C-8886-4844-B7AF-C42731DF9465",
              "versionEndExcluding": "5.4.136",
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1BD5A2EE-859F-40FC-BDAC-167AAE37C870",
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              "matchCriteriaId": "512C22FC-1524-4E6F-9E62-4F4B7B6E0576",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "71268287-21A8-4488-AA4F-23C473153131",
              "vulnerable": true
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "23B9E5C6-FAB5-4A02-9E39-27C8787B0991",
              "vulnerable": true
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          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix uninit-value in caif_seqpkt_sendmsg\n\nWhen nr_segs equal to zero in iovec_from_user, the object\nmsg-\u003emsg_iter.iov is uninit stack memory in caif_seqpkt_sendmsg\nwhich is defined in ___sys_sendmsg. So we cann\u0027t just judge\nmsg-\u003emsg_iter.iov-\u003ebase directlly. We can use nr_segs to judge\nmsg in caif_seqpkt_sendmsg whether has data buffers.\n\n=====================================================\nBUG: KMSAN: uninit-value in caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542\nCall Trace:\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0x1c9/0x220 lib/dump_stack.c:118\n kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118\n __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215\n caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542\n sock_sendmsg_nosec net/socket.c:652 [inline]\n sock_sendmsg net/socket.c:672 [inline]\n ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343\n ___sys_sendmsg net/socket.c:2397 [inline]\n __sys_sendmmsg+0x808/0xc90 net/socket.c:2480\n __compat_sys_sendmmsg net/compat.c:656 [inline]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: corrige el valor uninit en caif_seqpkt_sendmsg. Cuando nr_segs es igual a cero en iovec_from_user, el objeto msg-\u0026gt;msg_iter.iov es la memoria de pila uninit en caif_seqpkt_sendmsg que est\u00e1 definida en ___sys_sendmsg. Entonces no podemos simplemente juzgar msg-\u0026gt;msg_iter.iov-\u0026gt;base directamente. Podemos usar nr_segs para juzgar si msg en caif_seqpkt_sendmsg tiene buffers de datos. ==================================================== === BUG: KMSAN: valor uninit en caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 Seguimiento de llamadas: __dump_stack lib/dump_stack.c:77 [en l\u00ednea] dump_stack+0x1c9/0x220 lib/dump_stack.c: 118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 sock_sendmsg_nosec net/so cket.c: 652 [en l\u00ednea] sock_sendmsg net/socket.c:672 [en l\u00ednea] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [en l\u00ednea] __sys_sendmmsg+0x808/0xc90 80 __compat_sys_sendmmsg net/compat.c:656 [en l\u00ednea]"
    }
  ],
  "id": "CVE-2021-47297",
  "lastModified": "2026-06-17T04:17:07.950",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47297",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-05-29T18:54:57.355756Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-21T15:15:17.553",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff"
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    },
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    },
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    },
    {
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
    {
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff"
    },
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      "url": "https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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