Vulnerability-Lookup

CVE-2026-8449 (GCVE-0-2026-8449)

Vulnerability from cvelistv5 – Published: 2026-05-12 21:34 – Updated: 2026-05-13 15:14

This CVE ID has been rejected or withdrawn.

Show details on NVD website

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        "dateUpdated": "2026-05-13T15:14:52.974Z",
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-8449",
    "datePublished": "2026-05-12T21:34:59.782Z",
    "dateRejected": "2026-05-13T15:14:52.974Z",
    "dateReserved": "2026-05-12T21:15:19.856Z",
    "dateUpdated": "2026-05-13T15:14:52.974Z",
    "state": "REJECTED"
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      "percentile": "0.39139"
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FKIE_CVE-2026-8449

Vulnerability from fkie_nvd - Published: 2026-05-12 22:16 - Updated: 2026-05-13 16:17

Severity ?

Summary

Rejected reason: This CVE ID has been rejected or withdrawn.

References

	URL	Tags

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Rejected reason: This CVE ID has been rejected or withdrawn."
    }
  ],
  "id": "CVE-2026-8449",
  "lastModified": "2026-05-13T16:17:05.807",
  "metrics": {},
  "published": "2026-05-12T22:16:38.730",
  "references": [],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Rejected"
}

GHSA-898M-7RF9-QG74

Vulnerability from github – Published: 2026-05-13 00:48 – Updated: 2026-05-13 00:48

Details

Linux ksmbd contains a remote memory corruption vulnerability in the ACL inheritance path that allows remote clients with directory creation permissions to trigger a heap out-of-bounds read and subsequent heap corruption by setting a crafted DACL with a malformed SID containing an inflated num_subauth field. Attackers can exploit this vulnerability by creating a directory, setting the malicious DACL via SMB2_SET_INFO, and creating child entries to cause kernel instability, denial of service, or potentially achieve privilege escalation to kernel code execution.

Severity ?

8.8 (High)


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

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-8449"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-12T22:16:38Z",
    "severity": "HIGH"
  },
  "details": "Linux ksmbd contains a remote memory corruption vulnerability in the ACL inheritance path that allows remote clients with directory creation permissions to trigger a heap out-of-bounds read and subsequent heap corruption by setting a crafted DACL with a malformed SID containing an inflated num_subauth field. Attackers can exploit this vulnerability by creating a directory, setting the malicious DACL via SMB2_SET_INFO, and creating child entries to cause kernel instability, denial of service, or potentially achieve privilege escalation to kernel code execution.",
  "id": "GHSA-898m-7rf9-qg74",
  "modified": "2026-05-13T00:48:14Z",
  "published": "2026-05-13T00:48:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8449"
    },
    {
      "type": "WEB",
      "url": "https://github.com/torvalds/linux/commit/996454bc0da84d5a1dedb1a7861823087e01a7ae"
    },
    {
      "type": "WEB",
      "url": "https://github.com/torvalds/linux/blob/6596a02b207886e9e00bb0161c7fd59fea53c081/fs/smb/server/smbacl.c"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/linux-ksmbd-remote-memory-corruption-via-acl-inheritance"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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.

Action not permitted

CVE-2026-8449 (GCVE-0-2026-8449)

FKIE_CVE-2026-8449

GHSA-898M-7RF9-QG74

Tags

Sightings

Nomenclature