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Vulnerability details: VCID-xmh8-sgwc-g7bd
Vulnerability ID VCID-xmh8-sgwc-g7bd
Aliases CVE-2025-21673
Summary kernel: smb: client: fix double free of TCP_Server_Info::hostname
Status Published
Exploitability 0.5
Weighted Severity 5.0
Risk 2.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-415 Double Free
System Score Found at
cvssv3 5.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21673.json
epss 0.00018 https://api.first.org/data/v1/epss?cve=CVE-2025-21673
epss 0.00018 https://api.first.org/data/v1/epss?cve=CVE-2025-21673
epss 0.00018 https://api.first.org/data/v1/epss?cve=CVE-2025-21673
cvssv3.1 6.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 5.5 https://git.kernel.org/stable/c/1ea68070338518a1d31ce71e6abfe1b30001b27a
ssvc Track https://git.kernel.org/stable/c/1ea68070338518a1d31ce71e6abfe1b30001b27a
cvssv3.1 5.5 https://git.kernel.org/stable/c/a2be5f2ba34d0c6d5ef2624b24e3d852561fcd6a
ssvc Track https://git.kernel.org/stable/c/a2be5f2ba34d0c6d5ef2624b24e3d852561fcd6a
cvssv3.1 5.5 https://git.kernel.org/stable/c/fa2f9906a7b333ba757a7dbae0713d8a5396186e
ssvc Track https://git.kernel.org/stable/c/fa2f9906a7b333ba757a7dbae0713d8a5396186e
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21673.json
https://api.first.org/data/v1/epss?cve=CVE-2025-21673
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1ea68070338518a1d31ce71e6abfe1b30001b27a https://git.kernel.org/stable/c/1ea68070338518a1d31ce71e6abfe1b30001b27a
2343184 https://bugzilla.redhat.com/show_bug.cgi?id=2343184
a2be5f2ba34d0c6d5ef2624b24e3d852561fcd6a https://git.kernel.org/stable/c/a2be5f2ba34d0c6d5ef2624b24e3d852561fcd6a
fa2f9906a7b333ba757a7dbae0713d8a5396186e https://git.kernel.org/stable/c/fa2f9906a7b333ba757a7dbae0713d8a5396186e
USN-7445-1 https://usn.ubuntu.com/7445-1/
USN-7448-1 https://usn.ubuntu.com/7448-1/
USN-7595-1 https://usn.ubuntu.com/7595-1/
USN-7595-2 https://usn.ubuntu.com/7595-2/
USN-7595-3 https://usn.ubuntu.com/7595-3/
USN-7595-4 https://usn.ubuntu.com/7595-4/
USN-7595-5 https://usn.ubuntu.com/7595-5/
USN-7596-1 https://usn.ubuntu.com/7596-1/
USN-7596-2 https://usn.ubuntu.com/7596-2/
USN-7653-1 https://usn.ubuntu.com/7653-1/
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21673.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://git.kernel.org/stable/c/1ea68070338518a1d31ce71e6abfe1b30001b27a
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-10-01T19:52:08Z/ Found at https://git.kernel.org/stable/c/1ea68070338518a1d31ce71e6abfe1b30001b27a
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://git.kernel.org/stable/c/a2be5f2ba34d0c6d5ef2624b24e3d852561fcd6a
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-10-01T19:52:08Z/ Found at https://git.kernel.org/stable/c/a2be5f2ba34d0c6d5ef2624b24e3d852561fcd6a
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://git.kernel.org/stable/c/fa2f9906a7b333ba757a7dbae0713d8a5396186e
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-10-01T19:52:08Z/ Found at https://git.kernel.org/stable/c/fa2f9906a7b333ba757a7dbae0713d8a5396186e
Exploit Prediction Scoring System (EPSS)
Percentile 0.04777
EPSS Score 0.00018
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:49:29.088228+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21673.json 38.6.0