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CVE-2022-49325 (GCVE-0-2022-49325)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:10 – Updated: 2026-08-05 08:54
VLAI
Title
tcp: add accessors to read/set tp->snd_cwnd
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5d424d5a674f782d0659a3b66d951f412901faee , < 3308676ec525901bf1656014003c443a60730a04 (git)
Affected: 5d424d5a674f782d0659a3b66d951f412901faee , < 5aba0ad44fb4a7fb78c5076c313456de199a3c29 (git)
Affected: 5d424d5a674f782d0659a3b66d951f412901faee , < 41e191fe72282e193a7744e2fc1786b23156c9e4 (git)
Affected: 5d424d5a674f782d0659a3b66d951f412901faee , < 40570375356c874b1578e05c1dcc3ff7c1322dbe (git)
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Linux Linux Affected: 2.6.17
Unaffected: 0 , < 2.6.17 (semver)
Unaffected: 5.15.47 , ≤ 5.15.* (semver)
Unaffected: 5.17.15 , ≤ 5.17.* (semver)
Unaffected: 5.18.4 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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            "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."
          },
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            "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."
          }
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        "id": "CVE-2022-49325",
        "lastModified": "2026-08-04T10:17:44.163",
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        "published": "2025-02-26T07:01:09.323",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:44:40+00:00",
      "cve": "CVE-2022-49325",
      "id": "CVE-2022-49325",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "166",
      "product_status:known_affected": "112",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tcp: add accessors to read/set tp-\u003esnd_cwnd",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49325.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:32:18Z",
      "cve": "CVE-2022-49325",
      "id": "CVE-2022-49325",
      "initial_release_date": "2025-02-27T03:08:43Z",
      "product_status:known_affected": "629",
      "product_status:known_not_affected": "116",
      "product_status:recommended": "162",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49325",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49325.json",
      "version": "42"
    }
  }
}



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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.