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Vulnerability details: VCID-22gf-sy78-4kbj
Vulnerability ID VCID-22gf-sy78-4kbj
Aliases CVE-2025-21836
Summary kernel: io_uring/kbuf: re-using old struct io_buffer_list may lead to a use-after-free situation
Status Published
Exploitability 0.5
Weighted Severity 5.5
Risk 2.8
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21836.json
epss 0.0001 https://api.first.org/data/v1/epss?cve=CVE-2025-21836
epss 0.0001 https://api.first.org/data/v1/epss?cve=CVE-2025-21836
epss 0.0001 https://api.first.org/data/v1/epss?cve=CVE-2025-21836
cvssv3.1 5.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21836.json
https://api.first.org/data/v1/epss?cve=CVE-2025-21836
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2350584 https://bugzilla.redhat.com/show_bug.cgi?id=2350584
USN-7521-1 https://usn.ubuntu.com/7521-1/
USN-7521-2 https://usn.ubuntu.com/7521-2/
USN-7521-3 https://usn.ubuntu.com/7521-3/
USN-7703-1 https://usn.ubuntu.com/7703-1/
USN-7703-2 https://usn.ubuntu.com/7703-2/
USN-7703-3 https://usn.ubuntu.com/7703-3/
USN-7703-4 https://usn.ubuntu.com/7703-4/
USN-7719-1 https://usn.ubuntu.com/7719-1/
USN-7737-1 https://usn.ubuntu.com/7737-1/
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21836.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
Exploit Prediction Scoring System (EPSS)
Percentile 0.01279
EPSS Score 0.0001
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:47:47.358808+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-21836.json 38.6.0