CVE-2026-2340

A flaw was found in Samba’s vfs_worm module. The module is intended to provide write-once, read-many (WORM) protections by preventing modification of files after a configurable grace period. Due to insufficient validation during rename operations, an authenticated user with write access to a share could overwrite a protected file by renaming a newly created file over the existing WORM-protected file.

Database specific

{
    "cna_assigner": "redhat",
    "cwe_ids": [
        "CWE-280"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2340.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "fixed": "0:4.23.5-109.el10_2"
                        },
                        {
                            "fixed": "0:4.21.3-114.el10_0.1"
                        },
                        {
                            "fixed": "0:4.19.4-16.el8_10"
                        },
                        {
                            "fixed": "0:4.19.4-16.el8_10"
                        },
                        {
                            "fixed": "0:4.15.5-16.el8_6.1"
                        },
                        {
                            "fixed": "0:4.15.5-16.el8_6.1"
                        },
                        {
                            "fixed": "0:4.17.5-7.el8_8.1"
                        },
                        {
                            "fixed": "0:4.17.5-7.el8_8.1"
                        },
                        {
                            "fixed": "0:4.23.5-10.el9_8"
                        },
                        {
                            "fixed": "0:4.23.5-10.el9_8"
                        },
                        {
                            "fixed": "0:4.17.5-105.el9_2.5"
                        },
                        {
                            "fixed": "0:4.19.4-105.el9_4.4"
                        },
                        {
                            "fixed": "0:4.21.3-14.el9_6.1"
                        },
                        {
                            "fixed": "412.86.202608241157-0"
                        },
                        {
                            "fixed": "412.86.202609082051-0"
                        },
                        {
                            "fixed": "413.92.202609080414-0"
                        },
                        {
                            "fixed": "413.92.202609302032-0"
                        },
                        {
                            "fixed": "414.92.202608172040-0"
                        },
                        {
                            "fixed": "414.92.202609011250-0"
                        },
                        {
                            "fixed": "415.92.202608180329-0"
                        },
                        {
                            "fixed": "415.92.202609140326-0"
                        },
                        {
                            "fixed": "416.94.202608150307-0"
                        },
                        {
                            "fixed": "416.94.202609011112-0"
                        },
                        {
                            "fixed": "417.94.202608250221-0"
                        },
                        {
                            "fixed": "417.94.202609191027-0"
                        },
                        {
                            "fixed": "418.94.202608142238-0"
                        },
                        {
                            "fixed": "418.94.202609031320-0"
                        },
                        {
                            "fixed": "4.19.9.6.202606241344-0"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "InverseAffectedRanges"
                }
            ]
        }
    ]
}

References

Affected packages

Git / github.com/samba-team/samba

Affected ranges

Type

GIT

Repo

https://github.com/samba-team/samba

Events

Introduced

8fdd82c8b9ccc39f0b5f5d6cc22fa69f67c913a4

Fixed

0abfaceda097f447ac0284db9f639dabc5070595

Introduced

942092eadf52c46f9bd913525015d53cb1cc8fb1

Fixed

11bc23b9182aca30456c5785f1e63d405899434d

Introduced

86f97e92d182c19435a8b60221a4ca383da77111

Fixed

d125b56c342341d07a6ff03674ceae982fc0539e

Database specific

Show details

{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "4.20.0"
                },
                {
                    "fixed": "4.22.10"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "4.23.0"
                },
                {
                    "fixed": "4.23.8"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "4.24.0"
                },
                {
                    "fixed": "4.24.3"
                }
            ],
            "source": "CPE_RANGE"
        }
    ]
}

Affected versions

samba-4.*

samba-4.23.0

samba-4.23.1

samba-4.23.2

samba-4.23.3

samba-4.23.4

samba-4.23.5

samba-4.23.6

samba-4.23.7

samba-4.24.0

samba-4.24.1

samba-4.24.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2340.json"