Vulnerability-Lookup

ubuntu-cve-2026-28364

Vulnerability from osv_ubuntu

Published

2026-02-27 04:16

Modified

2026-07-24 13:10

Summary

Details

In OCaml before 4.14.3 and 5.x before 5.4.1, a buffer over-read in Marshal deserialization (runtime/intern.c) enables remote code execution through a multi-phase attack chain. The vulnerability stems from missing bounds validation in the readblock() function, which performs unbounded memcpy() operations using attacker-controlled lengths from crafted Marshal data.

Severity

7.9 (High)


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

7.9 (High)


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

7.8 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-28364	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-28364	REPORT
	https://osv.dev/vulnerability/OSEC-2026-01	REPORT
	https://github.com/ocaml/security-advisories/blob…	REPORT

JSON

To clipboard

{
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            "binary_version": "4.01.0-3ubuntu3.1+esm1"
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  ],
  "aliases": [],
  "details": "In OCaml before 4.14.3 and 5.x before 5.4.1, a buffer over-read in Marshal deserialization (runtime/intern.c) enables remote code execution through a multi-phase attack chain. The vulnerability stems from missing bounds validation in the readblock() function, which performs unbounded memcpy() operations using attacker-controlled lengths from crafted Marshal data.",
  "id": "UBUNTU-CVE-2026-28364",
  "modified": "2026-07-24T13:10:21Z",
  "published": "2026-02-27T04:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-28364"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-28364"
    },
    {
      "type": "REPORT",
      "url": "https://osv.dev/vulnerability/OSEC-2026-01"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/ocaml/security-advisories/blob/generated-osv/2026/OSEC-2026-01.json"
    }
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  "related": [],
  "schema_version": "1.7.0",
  "severity": [
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      "type": "CVSS_V3"
    },
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      "type": "CVSS_V3"
    },
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      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-28364"
  ]
}

CVE-2026-28364 (GCVE-0-2026-28364)

Vulnerability from cvelistv5 – Published: 2026-02-27 03:54 – Updated: 2026-07-15 01:11

Summary

Severity

7.9 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-126 - Buffer Over-read
CWE-125 - Out-of-bounds Read

Assigner

mitre

References

5 references

URL	Tags
https://github.com/ocaml/security-advisories/blob…
https://osv.dev/vulnerability/OSEC-2026-01
https://access.redhat.com/security/cve/CVE-2026-28364	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2443348	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

7 products

Vendor	Product	Version
OCaml	OCaml	Affected: 0 , < 4.14.3 (semver) Affected: 5.0.0 , < 5.4.1 (semver)
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat Hardened Images	cpe:/a:redhat:hummingbird:1

Show details on NVD website

JSON

To clipboard

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            "time": "2026-02-27T16:01:20.960Z",
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          },
          {
            "lang": "en",
            "time": "2026-02-27T03:54:53.458Z",
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        ],
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    "dateReserved": "2026-02-27T03:54:53.320Z",
    "dateUpdated": "2026-07-15T01:11:48.593Z",
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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.

Action not permitted

ubuntu-cve-2026-28364

Vulnerability from osv_ubuntu

CVE-2026-28364 (GCVE-0-2026-28364)

Tags

Sightings

Nomenclature