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Vulnerability details: VCID-wrmn-5spt-mbcs
Vulnerability ID VCID-wrmn-5spt-mbcs
Aliases CVE-2025-21693
Summary kernel: mm: zswap: properly synchronize freeing resources during CPU hotunplug
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
cvssv3 5.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21693.json
epss 0.00024 https://api.first.org/data/v1/epss?cve=CVE-2025-21693
epss 0.00024 https://api.first.org/data/v1/epss?cve=CVE-2025-21693
cvssv3.1 7 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.8 https://git.kernel.org/stable/c/12dcb0ef540629a281533f9dedc1b6b8e14cfb65
ssvc Track https://git.kernel.org/stable/c/12dcb0ef540629a281533f9dedc1b6b8e14cfb65
cvssv3.1 7.8 https://git.kernel.org/stable/c/8d29ff5d50304daa41dc3cfdda4a9d1e46cf5be1
ssvc Track https://git.kernel.org/stable/c/8d29ff5d50304daa41dc3cfdda4a9d1e46cf5be1
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21693.json
https://api.first.org/data/v1/epss?cve=CVE-2025-21693
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
12dcb0ef540629a281533f9dedc1b6b8e14cfb65 https://git.kernel.org/stable/c/12dcb0ef540629a281533f9dedc1b6b8e14cfb65
2344684 https://bugzilla.redhat.com/show_bug.cgi?id=2344684
8d29ff5d50304daa41dc3cfdda4a9d1e46cf5be1 https://git.kernel.org/stable/c/8d29ff5d50304daa41dc3cfdda4a9d1e46cf5be1
RHSA-2025:20095 https://access.redhat.com/errata/RHSA-2025:20095
RHSA-2025:20518 https://access.redhat.com/errata/RHSA-2025:20518
USN-7445-1 https://usn.ubuntu.com/7445-1/
USN-7448-1 https://usn.ubuntu.com/7448-1/
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-2025-21693.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:H/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:H/I:H/A:H Found at https://git.kernel.org/stable/c/12dcb0ef540629a281533f9dedc1b6b8e14cfb65
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:T/P:M/B:A/M:M/D:T/2025-02-10T17:10:07Z/ Found at https://git.kernel.org/stable/c/12dcb0ef540629a281533f9dedc1b6b8e14cfb65
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://git.kernel.org/stable/c/8d29ff5d50304daa41dc3cfdda4a9d1e46cf5be1
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:T/P:M/B:A/M:M/D:T/2025-02-10T17:10:07Z/ Found at https://git.kernel.org/stable/c/8d29ff5d50304daa41dc3cfdda4a9d1e46cf5be1
Exploit Prediction Scoring System (EPSS)
Percentile 0.07111
EPSS Score 0.00024
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:49:13.941952+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21693.json 38.6.0