Vulnerability-Lookup

GHSA-2QMC-X97C-8PMC

Vulnerability from github – Published: 2025-12-30 15:30 – Updated: 2026-08-04 12:34

Details

In the Linux kernel, the following vulnerability has been resolved:

tcp: fix a signed-integer-overflow bug in tcp_add_backlog()

The type of sk_rcvbuf and sk_sndbuf in struct sock is int, and in tcp_add_backlog(), the variable limit is caculated by adding sk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value of int and overflow. This patch reduces the limit budget by halving the sndbuf to solve this issue since ACK packets are much smaller than the payload.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50865"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-30T13:16:01Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: fix a signed-integer-overflow bug in tcp_add_backlog()\n\nThe type of sk_rcvbuf and sk_sndbuf in struct sock is int, and\nin tcp_add_backlog(), the variable limit is caculated by adding\nsk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value\nof int and overflow. This patch reduces the limit budget by\nhalving the sndbuf to solve this issue since ACK packets are much\nsmaller than the payload.",
  "id": "GHSA-2qmc-x97c-8pmc",
  "modified": "2026-08-04T12:34:46Z",
  "published": "2025-12-30T15:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50865"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/28addf029417d53b1df062b4c87feb7bc033cb5f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f23cb2be530785db284a685d1b1c30224d8a538"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d04b4d0feee12bce6bfe37f30d8e953d3c30368"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a85d39f14aa8a71e29cfb5eb5de02878a8779898"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec791d8149ff60c40ad2074af3b92a39c916a03f"
    }
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-50865 (GCVE-0-2022-50865)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:15 – Updated: 2026-08-05 08:59

Title

tcp: fix a signed-integer-overflow bug in tcp_add_backlog()

Summary

In the Linux kernel, the following vulnerability has been resolved: tcp: fix a signed-integer-overflow bug in tcp_add_backlog() The type of sk_rcvbuf and sk_sndbuf in struct sock is int, and in tcp_add_backlog(), the variable limit is caculated by adding sk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value of int and overflow. This patch reduces the limit budget by halving the sndbuf to solve this issue since ACK packets are much smaller than the payload.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-16 15:51 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

5 references

URL	Tags
https://git.kernel.org/stable/c/9d04b4d0feee12bce…
https://git.kernel.org/stable/c/4f23cb2be530785db…
https://git.kernel.org/stable/c/a85d39f14aa8a71e2…
https://git.kernel.org/stable/c/28addf029417d53b1…
https://git.kernel.org/stable/c/ec791d8149ff60c40…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c9c3321257e1b95be9b375f811fb250162af8d39 , < 9d04b4d0feee12bce6bfe37f30d8e953d3c30368 (git) Affected: c9c3321257e1b95be9b375f811fb250162af8d39 , < 4f23cb2be530785db284a685d1b1c30224d8a538 (git) Affected: c9c3321257e1b95be9b375f811fb250162af8d39 , < a85d39f14aa8a71e29cfb5eb5de02878a8779898 (git) Affected: c9c3321257e1b95be9b375f811fb250162af8d39 , < 28addf029417d53b1df062b4c87feb7bc033cb5f (git) Affected: c9c3321257e1b95be9b375f811fb250162af8d39 , < ec791d8149ff60c40ad2074af3b92a39c916a03f (git)
Linux	Linux	Affected: 4.9 Unaffected: 0 , < 4.9 (semver) Unaffected: 5.4.278 , ≤ 5.4.* (semver) Unaffected: 5.10.153 , ≤ 5.10.* (semver) Unaffected: 5.15.77 , ≤ 5.15.* (semver) Unaffected: 6.0.7 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix)

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                "id": "CVE-2022-50865",
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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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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