Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-5czk-8u6k-57bf
Vulnerability ID VCID-5czk-8u6k-57bf
Aliases CVE-2025-39821
Summary kernel: perf: Avoid undefined behavior from stopping/starting inactive events
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-1335 Incorrect Bitwise Shift of Integer
System Score Found at
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-39821.json
epss 0.00022 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00022 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00022 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00022 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00022 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00022 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00025 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00025 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00025 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00025 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00025 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00025 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00025 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00025 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
epss 0.00025 https://api.first.org/data/v1/epss?cve=CVE-2025-39821
cvssv3.1 5.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.8 https://git.kernel.org/stable/c/b64fdd422a85025b5e91ead794db9d3ef970e369
ssvc Track https://git.kernel.org/stable/c/b64fdd422a85025b5e91ead794db9d3ef970e369
cvssv3.1 7.8 https://git.kernel.org/stable/c/d689135aa9c5e4e0eab5a92bbe35dab0c8d6677f
ssvc Track https://git.kernel.org/stable/c/d689135aa9c5e4e0eab5a92bbe35dab0c8d6677f
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-39821.json
https://api.first.org/data/v1/epss?cve=CVE-2025-39821
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2395793 https://bugzilla.redhat.com/show_bug.cgi?id=2395793
b64fdd422a85025b5e91ead794db9d3ef970e369 https://git.kernel.org/stable/c/b64fdd422a85025b5e91ead794db9d3ef970e369
d689135aa9c5e4e0eab5a92bbe35dab0c8d6677f https://git.kernel.org/stable/c/d689135aa9c5e4e0eab5a92bbe35dab0c8d6677f
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-39821.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:L/PR:L/UI:N/S:U/C:N/I:N/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/b64fdd422a85025b5e91ead794db9d3ef970e369
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/2026-01-14T18:16:47Z/ Found at https://git.kernel.org/stable/c/b64fdd422a85025b5e91ead794db9d3ef970e369
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/d689135aa9c5e4e0eab5a92bbe35dab0c8d6677f
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/2026-01-14T18:16:47Z/ Found at https://git.kernel.org/stable/c/d689135aa9c5e4e0eab5a92bbe35dab0c8d6677f
Exploit Prediction Scoring System (EPSS)
Percentile 0.05881
EPSS Score 0.00022
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:36:53.399430+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-39821.json 38.0.0