Vulnerability-Lookup

GHSA-PHW4-WH3R-2WJ6

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32

Details

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

x86/boot: Validate console=uart8250 baud rate to fix early boot hang

When the baud rate is empty, 0, invalid, or overflows to 0 when stored as an int, the system will hang during early boot because of a division by zero in early_serial_init().

Fall back to DEFAULT_BAUD when the resulting baud rate is 0 to prevent an early system hang.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72238"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:50Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/boot: Validate console=uart8250 baud rate to fix early boot hang\n\nWhen the baud rate is empty, 0, invalid, or overflows to 0 when stored\nas an int, the system will hang during early boot because of a division\nby zero in early_serial_init().\n\nFall back to DEFAULT_BAUD when the resulting baud rate is 0 to prevent\nan early system hang.",
  "id": "GHSA-phw4-wh3r-2wj6",
  "modified": "2026-08-15T06:32:17Z",
  "published": "2026-08-15T06:32:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72238"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24fbed0a2a45f5f379ef2b53bd2abe58be1142ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4dad7e870c7e5178f71b5e1e4f67934b9e8cc207"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a77a7639dfdc3eca417cd37620ce64da79c80c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4d05032e9af7137eab8f3af2855073f896ca843"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c1a276a731d02cbb728d0530f327a68728f2d8b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/efa96a22613b86e05cd81229ce0be411c1a4a79a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f7c67c97b37c11f2a95c204092fb8159f2779e8f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ffa0aa5b625fe0bed7463ac613f8b06676ff4542"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-72238 (GCVE-0-2026-72238)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:54 – Updated: 2026-08-17 05:10

Title

x86/boot: Validate console=uart8250 baud rate to fix early boot hang

Summary

In the Linux kernel, the following vulnerability has been resolved: x86/boot: Validate console=uart8250 baud rate to fix early boot hang When the baud rate is empty, 0, invalid, or overflows to 0 when stored as an int, the system will hang during early boot because of a division by zero in early_serial_init(). Fall back to DEFAULT_BAUD when the resulting baud rate is 0 to prevent an early system hang.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c1a276a731d02cbb7…
https://git.kernel.org/stable/c/24fbed0a2a45f5f37…
https://git.kernel.org/stable/c/efa96a22613b86e05…
https://git.kernel.org/stable/c/9a77a7639dfdc3eca…
https://git.kernel.org/stable/c/b4d05032e9af7137e…
https://git.kernel.org/stable/c/f7c67c97b37c11f2a…
https://git.kernel.org/stable/c/4dad7e870c7e5178f…
https://git.kernel.org/stable/c/ffa0aa5b625fe0bed…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ce0aa5dd20e44372f9617dd67c984f41fcdbed88 , < c1a276a731d02cbb728d0530f327a68728f2d8b0 (git) Affected: ce0aa5dd20e44372f9617dd67c984f41fcdbed88 , < 24fbed0a2a45f5f379ef2b53bd2abe58be1142ad (git) Affected: ce0aa5dd20e44372f9617dd67c984f41fcdbed88 , < efa96a22613b86e05cd81229ce0be411c1a4a79a (git) Affected: ce0aa5dd20e44372f9617dd67c984f41fcdbed88 , < 9a77a7639dfdc3eca417cd37620ce64da79c80c4 (git) Affected: ce0aa5dd20e44372f9617dd67c984f41fcdbed88 , < b4d05032e9af7137eab8f3af2855073f896ca843 (git) Affected: ce0aa5dd20e44372f9617dd67c984f41fcdbed88 , < f7c67c97b37c11f2a95c204092fb8159f2779e8f (git) Affected: ce0aa5dd20e44372f9617dd67c984f41fcdbed88 , < 4dad7e870c7e5178f71b5e1e4f67934b9e8cc207 (git) Affected: ce0aa5dd20e44372f9617dd67c984f41fcdbed88 , < ffa0aa5b625fe0bed7463ac613f8b06676ff4542 (git)
Linux	Linux	Affected: 2.6.36 Unaffected: 0 , < 2.6.36 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-PHW4-WH3R-2WJ6

CVE-2026-72238 (GCVE-0-2026-72238)

Tags

Sightings

Nomenclature