FKIE_CVE-2022-49325

Vulnerability from fkie_nvd - Published: 2025-02-26 07:01 - Updated: 2026-08-04 10:17
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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: tcp: add accessors to read/set tp->snd_cwnd We had various bugs over the years with code breaking the assumption that tp->snd_cwnd is greater than zero. Lately, syzbot reported the WARN_ON_ONCE(!tp->prior_cwnd) added in commit 8b8a321ff72c ("tcp: fix zero cwnd in tcp_cwnd_reduction") can trigger, and without a repro we would have to spend considerable time finding the bug. Instead of complaining too late, we want to catch where and when tp->snd_cwnd is set to an illegal value.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3308676ec525901bf1656014003c443a60730a04Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/40570375356c874b1578e05c1dcc3ff7c1322dbePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/41e191fe72282e193a7744e2fc1786b23156c9e4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5aba0ad44fb4a7fb78c5076c313456de199a3c29Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/tcp.h",
            "include/trace/events/tcp.h",
            "net/core/filter.c",
            "net/ipv4/tcp.c",
            "net/ipv4/tcp_bbr.c",
            "net/ipv4/tcp_bic.c",
            "net/ipv4/tcp_cdg.c",
            "net/ipv4/tcp_cong.c",
            "net/ipv4/tcp_cubic.c",
            "net/ipv4/tcp_dctcp.c",
            "net/ipv4/tcp_highspeed.c",
            "net/ipv4/tcp_htcp.c",
            "net/ipv4/tcp_hybla.c",
            "net/ipv4/tcp_illinois.c",
            "net/ipv4/tcp_input.c",
            "net/ipv4/tcp_ipv4.c",
            "net/ipv4/tcp_lp.c",
            "net/ipv4/tcp_metrics.c",
            "net/ipv4/tcp_nv.c",
            "net/ipv4/tcp_output.c",
            "net/ipv4/tcp_rate.c",
            "net/ipv4/tcp_scalable.c",
            "net/ipv4/tcp_vegas.c",
            "net/ipv4/tcp_veno.c",
            "net/ipv4/tcp_westwood.c",
            "net/ipv4/tcp_yeah.c",
            "net/ipv6/tcp_ipv6.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3308676ec525901bf1656014003c443a60730a04",
              "status": "affected",
              "version": "5d424d5a674f782d0659a3b66d951f412901faee",
              "versionType": "git"
            },
            {
              "lessThan": "5aba0ad44fb4a7fb78c5076c313456de199a3c29",
              "status": "affected",
              "version": "5d424d5a674f782d0659a3b66d951f412901faee",
              "versionType": "git"
            },
            {
              "lessThan": "41e191fe72282e193a7744e2fc1786b23156c9e4",
              "status": "affected",
              "version": "5d424d5a674f782d0659a3b66d951f412901faee",
              "versionType": "git"
            },
            {
              "lessThan": "40570375356c874b1578e05c1dcc3ff7c1322dbe",
              "status": "affected",
              "version": "5d424d5a674f782d0659a3b66d951f412901faee",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/tcp.h",
            "include/trace/events/tcp.h",
            "net/core/filter.c",
            "net/ipv4/tcp.c",
            "net/ipv4/tcp_bbr.c",
            "net/ipv4/tcp_bic.c",
            "net/ipv4/tcp_cdg.c",
            "net/ipv4/tcp_cong.c",
            "net/ipv4/tcp_cubic.c",
            "net/ipv4/tcp_dctcp.c",
            "net/ipv4/tcp_highspeed.c",
            "net/ipv4/tcp_htcp.c",
            "net/ipv4/tcp_hybla.c",
            "net/ipv4/tcp_illinois.c",
            "net/ipv4/tcp_input.c",
            "net/ipv4/tcp_ipv4.c",
            "net/ipv4/tcp_lp.c",
            "net/ipv4/tcp_metrics.c",
            "net/ipv4/tcp_nv.c",
            "net/ipv4/tcp_output.c",
            "net/ipv4/tcp_rate.c",
            "net/ipv4/tcp_scalable.c",
            "net/ipv4/tcp_vegas.c",
            "net/ipv4/tcp_veno.c",
            "net/ipv4/tcp_westwood.c",
            "net/ipv4/tcp_yeah.c",
            "net/ipv6/tcp_ipv6.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.17"
            },
            {
              "lessThan": "2.6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "30EAD0EB-B3D1-4A88-A3D8-4F8242E81A01",
              "versionEndExcluding": "5.15.47",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "53E7AA2E-2FB4-45CA-A22B-08B4EDBB51AD",
              "versionEndExcluding": "5.17.15",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FA6D643C-6D6A-4821-8A8D-B5776B8F0103",
              "versionEndExcluding": "5.18.4",
              "versionStartIncluding": "5.18",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: add accessors to read/set tp-\u003esnd_cwnd\n\nWe had various bugs over the years with code\nbreaking the assumption that tp-\u003esnd_cwnd is greater\nthan zero.\n\nLately, syzbot reported the WARN_ON_ONCE(!tp-\u003eprior_cwnd) added\nin commit 8b8a321ff72c (\"tcp: fix zero cwnd in tcp_cwnd_reduction\")\ncan trigger, and without a repro we would have to spend\nconsiderable time finding the bug.\n\nInstead of complaining too late, we want to catch where\nand when tp-\u003esnd_cwnd is set to an illegal value."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tcp: agregar descriptores de acceso para leer/establecer tp-\u0026gt;snd_cwnd Tuvimos varios errores a lo largo de los a\u00f1os con c\u00f3digo que romp\u00eda la suposici\u00f3n de que tp-\u0026gt;snd_cwnd es mayor que cero. \u00daltimamente, syzbot inform\u00f3 que se puede activar WARN_ON_ONCE(!tp-\u0026gt;prior_cwnd) agregado en el commit 8b8a321ff72c (\"tcp: corregir cwnd cero en tcp_cwnd_reduction\"), y sin una reproducci\u00f3n tendr\u00edamos que dedicar un tiempo considerable a encontrar el error. En lugar de quejarnos demasiado tarde, queremos detectar d\u00f3nde y cu\u00e1ndo tp-\u0026gt;snd_cwnd se establece en un valor ilegal."
    }
  ],
  "id": "CVE-2022-49325",
  "lastModified": "2026-08-04T10:17:44.163",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "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": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-02-26T07:01:09.323",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3308676ec525901bf1656014003c443a60730a04"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/40570375356c874b1578e05c1dcc3ff7c1322dbe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/41e191fe72282e193a7744e2fc1786b23156c9e4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5aba0ad44fb4a7fb78c5076c313456de199a3c29"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-617"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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