Denial of service via IKEv2 memory leak
Published Aug 14, 2025 · Updated Aug 14, 2025
Memory leak in Cisco IOS, IOS XE, ASA, and FTD allows remote attackers to cause reloads or system instability via crafted IKEv2 packets. IKEv2 packet processing fails to release memory after handling the crafted input, so repeated packets accumulate unreclaimed memory. Exploitation is unauthenticated but requires IKEv2 VPN to be enabled; IOS and IOS XE devices reload, while ASA and FTD lose memory and require a manual reboot.
Summary
What happened
Memory leak in Cisco IOS, IOS XE, ASA, and FTD allows remote attackers to cause reloads or system instability via crafted IKEv2 packets. IKEv2 packet processing fails to release memory after handling the crafted input, so repeated packets accumulate unreclaimed memory. Exploitation is unauthenticated but requires IKEv2 VPN to be enabled; IOS and IOS XE devices reload, while ASA and FTD lose memory and require a manual reboot.
The record
- CVE
- CVE-2025-20225
- Published
- Aug 14, 2025
- Updated
- Aug 14, 2025
- Vendor
- ClamAV
- Product
- Cisco Adaptive Security Appliance (ASA) Software
- Classifications
- CWE-401, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 14, 2025CVE publishedPublication date reported by the CVE source.
- Aug 14, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=9.12.1
- Affected versionversion=9.12.1.2
- Affected versionversion=9.12.1.3
- Affected versionversion=9.12.2
- Affected versionversion=9.12.2.1
- Affected versionversion=9.12.2.4
- Affected versionversion=9.12.2.5
- Affected versionversion=9.12.2.9
- Affected versionversion=9.12.3
- Affected versionversion=9.12.3.12
- Affected versionversion=9.12.3.2
- Affected versionversion=9.12.3.7
- Affected versionversion=9.12.3.9
- Affected versionversion=9.12.4
- Affected versionversion=9.12.4.10
- Affected versionversion=9.12.4.13
- Affected versionversion=9.12.4.18
- Affected versionversion=9.12.4.2
- Affected versionversion=9.12.4.24
- Affected versionversion=9.12.4.26
- Affected versionversion=9.12.4.29
- Affected versionversion=9.12.4.30
- Affected versionversion=9.12.4.35
- Affected versionversion=9.12.4.37
- Affected versionversion=9.12.4.38
- Affected versionversion=9.12.4.39
- Affected versionversion=9.12.4.4
- Affected versionversion=9.12.4.40
- Affected versionversion=9.12.4.41
- Affected versionversion=9.12.4.47
- Affected versionversion=9.12.4.48
- Affected versionversion=9.12.4.50
- Affected versionversion=9.12.4.52
- Affected versionversion=9.12.4.54
- Affected versionversion=9.12.4.55
- Affected versionversion=9.12.4.56
- Affected versionversion=9.12.4.58
- Affected versionversion=9.12.4.62
- Affected versionversion=9.12.4.65
- Affected versionversion=9.12.4.67
- Affected versionversion=9.12.4.7
- Affected versionversion=9.12.4.8
- Affected versionversion=9.14.1
- Affected versionversion=9.14.1.10
- Affected versionversion=9.14.1.15
- Affected versionversion=9.14.1.19
- Affected versionversion=9.14.1.30
- Affected versionversion=9.14.1.6
- Affected versionversion=9.14.2
- Affected versionversion=9.14.2.13
- Affected versionversion=9.14.2.15
- Affected versionversion=9.14.2.4
- Affected versionversion=9.14.2.8
- Affected versionversion=9.14.3
- Affected versionversion=9.14.3.1
- Affected versionversion=9.14.3.11
- Affected versionversion=9.14.3.13
- Affected versionversion=9.14.3.15
- Affected versionversion=9.14.3.18
- Affected versionversion=9.14.3.9
- Affected versionversion=9.14.4
- Affected versionversion=9.14.4.12
- Affected versionversion=9.14.4.13
- Affected versionversion=9.14.4.14
- Affected versionversion=9.14.4.15
- Affected versionversion=9.14.4.17
- Affected versionversion=9.14.4.22
- Affected versionversion=9.14.4.23
- Affected versionversion=9.14.4.24
- Affected versionversion=9.14.4.6
- Affected versionversion=9.14.4.7
- Affected versionversion=9.16.1
- Affected versionversion=9.16.1.28
- Affected versionversion=9.16.2
- Affected versionversion=9.16.2.11
- Affected versionversion=9.16.2.13
- Affected versionversion=9.16.2.14
- Affected versionversion=9.16.2.3
- Affected versionversion=9.16.2.7
- Affected versionversion=9.16.3
- Affected versionversion=9.16.3.14
- Affected versionversion=9.16.3.15
- Affected versionversion=9.16.3.19
- Affected versionversion=9.16.3.23
- Affected versionversion=9.16.3.3
- Affected versionversion=9.16.4
- Affected versionversion=9.16.4.14
- Affected versionversion=9.16.4.18
- Affected versionversion=9.16.4.19
- Affected versionversion=9.16.4.27
- Affected versionversion=9.16.4.38
- Affected versionversion=9.16.4.39
- Affected versionversion=9.16.4.42
- Affected versionversion=9.16.4.48
- Affected versionversion=9.16.4.55
- Affected versionversion=9.16.4.57
- Affected versionversion=9.16.4.61
- Affected versionversion=9.16.4.62
- Affected versionversion=9.16.4.67
- Affected versionversion=9.16.4.70
- Affected versionversion=9.16.4.71
- Affected versionversion=9.16.4.76
- Affected versionversion=9.16.4.82
- Affected versionversion=9.16.4.9
- Affected versionversion=9.17.1
- Affected versionversion=9.17.1.10
- Affected versionversion=9.17.1.11
- Affected versionversion=9.17.1.13
- Affected versionversion=9.17.1.15
- Affected versionversion=9.17.1.20
- Affected versionversion=9.17.1.30
- Affected versionversion=9.17.1.33
- Affected versionversion=9.17.1.39
- Affected versionversion=9.17.1.45
- Affected versionversion=9.17.1.46
- Affected versionversion=9.17.1.7
- Affected versionversion=9.17.1.9
- Affected versionversion=9.18.1
- Affected versionversion=9.18.1.3
- Affected versionversion=9.18.2
- Affected versionversion=9.18.2.5
- Affected versionversion=9.18.2.7
- Affected versionversion=9.18.2.8
- Affected versionversion=9.18.3
- Affected versionversion=9.18.3.39
- Affected versionversion=9.18.3.46
- Affected versionversion=9.18.3.53
- Affected versionversion=9.18.3.55
- Affected versionversion=9.18.3.56
- Affected versionversion=9.18.4
- Affected versionversion=9.18.4.22
- Affected versionversion=9.18.4.24
- Affected versionversion=9.18.4.29
- Affected versionversion=9.18.4.34
- Affected versionversion=9.18.4.40
- Affected versionversion=9.18.4.47
- Affected versionversion=9.18.4.5
- Affected versionversion=9.18.4.50
- Affected versionversion=9.18.4.52
- Affected versionversion=9.18.4.53
- Affected versionversion=9.18.4.8
- Affected versionversion=9.19.1
- Affected versionversion=9.19.1.12
- Affected versionversion=9.19.1.18
- Affected versionversion=9.19.1.22
- Affected versionversion=9.19.1.24
- Affected versionversion=9.19.1.27
- Affected versionversion=9.19.1.28
- Affected versionversion=9.19.1.31
- Affected versionversion=9.19.1.37
- Affected versionversion=9.19.1.38
- Affected versionversion=9.19.1.5
- Affected versionversion=9.19.1.9
- Affected versionversion=9.20.1
- Affected versionversion=9.20.1.5
- Affected versionversion=9.20.2
- Affected versionversion=9.20.2.10
- Affected versionversion=9.20.2.21
- Affected versionversion=9.20.2.22
- Affected versionversion=9.20.3
- Affected versionversion=9.20.3.10
- Affected versionversion=9.20.3.13
- Affected versionversion=9.20.3.4
- Affected versionversion=9.20.3.7
- Affected versionversion=9.20.3.9
- Affected versionversion=9.22.1.1
- Affected versionversion=9.22.1.2
- Affected versionversion=9.22.1.3
- Affected versionversion=9.22.1.6
- Affected versionversion=9.23.1
- Affected versionversion=9.8.1
- Affected versionversion=9.8.1.5
- Affected versionversion=9.8.1.7
- Affected versionversion=9.8.2
- Affected versionversion=9.8.2.14
- Affected versionversion=9.8.2.15
- Affected versionversion=9.8.2.17
- Affected versionversion=9.8.2.20
- Affected versionversion=9.8.2.24
- Affected versionversion=9.8.2.26
- Affected versionversion=9.8.2.28
- Affected versionversion=9.8.2.33
- Affected versionversion=9.8.2.35
- Affected versionversion=9.8.2.38
- Affected versionversion=9.8.2.45
- Affected versionversion=9.8.2.8
- Affected versionversion=9.8.3
- Affected versionversion=9.8.3.11
- Affected versionversion=9.8.3.14
- Affected versionversion=9.8.3.16
- Affected versionversion=9.8.3.18
- Affected versionversion=9.8.3.21
- Affected versionversion=9.8.3.26
- Affected versionversion=9.8.3.29
- Affected versionversion=9.8.3.8
- Affected versionversion=9.8.4
- Affected versionversion=9.8.4.10
- Affected versionversion=9.8.4.12
- Affected versionversion=9.8.4.15
- Affected versionversion=9.8.4.17
- Affected versionversion=9.8.4.20
- Affected versionversion=9.8.4.22
- Affected versionversion=9.8.4.25
- Affected versionversion=9.8.4.26
- Affected versionversion=9.8.4.29
- Affected versionversion=9.8.4.3
- Affected versionversion=9.8.4.32
- Affected versionversion=9.8.4.33
- Affected versionversion=9.8.4.34
- Affected versionversion=9.8.4.35
- Affected versionversion=9.8.4.39
- Affected versionversion=9.8.4.40
- Affected versionversion=9.8.4.41
- Affected versionversion=9.8.4.43
- Affected versionversion=9.8.4.44
- Affected versionversion=9.8.4.45
- Affected versionversion=9.8.4.46
- Affected versionversion=9.8.4.48
- Affected versionversion=9.8.4.7
- Affected versionversion=9.8.4.8
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo