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CVE-2019-18805 (GCVE-0-2019-18805)

Vulnerability from cvelistv5 – Published: 2019-11-07 13:08 – Updated: 2024-08-05 02:02
VLAI
Summary
An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
References
Show details on NVD website
To clipboard 

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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T11:28:56+00:00",
      "cve": "CVE-2019-18805",
      "id": "CVE-2019-18805",
      "initial_release_date": "2019-04-16T00:00:00+00:00",
      "product_status:fixed": "175",
      "product_status:known_not_affected": "55",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-18805.json",
      "version": "3"
    }
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}



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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.