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CVE-2026-45769

ikev2: unbounded client transform storage can lead to resource exhaustion

7.5 HighFix available

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5,IKEv2 parser state could grow without bounds while storing client transforms. Repeated crafted UDP traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 fix the issue. Some workarounds are available. Disable IKE application-layer parsing if it is not needed. Alternatively, use a rule to bypass ike flows after the first packets like alert ike any any -> any any (sid: 2; flow.pkts_toserver: > 256; bypass; noalert;).

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.79%Up 1.7 points since Jun 12, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.5

ikev2: unbounded client transform storage can lead to resource exhaustion

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5,IKEv2 parser state could grow without bounds while storing client transforms. Repeated crafted UDP traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 fix the issue. Some workarounds are available. Disable IKE application-layer parsing if it is not needed. Alternatively, use a rule to bypass ike flows after the first packets like alert ike any any -> any any (sid: 2; flow.pkts_toserver: > 256; bypass; noalert;).

Record
CVE-2026-45769
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400, CWE-770
Updated
2026-11-02
EUVDEUVD-2026-75789 7.5

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5,IKEv2 parser state could grow without bounds while storing client transforms. Repeated crafted UDP traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 fix the issue. Some workarounds are available. Disable IKE application-layer parsing if it is not needed. Alternatively, use a rule to bypass ike flows after the first packets like alert ike any any -> any any (sid: 2; flow.pkts_toserver: > 256; bypass; noalert;).

Record
EUVD-2026-75789
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
NVD 7.5

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5,IKEv2 parser state could grow without bounds while storing client transforms. Repeated crafted UDP traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 fix the issue. Some workarounds are available. Disable IKE application-layer parsing if it is not needed. Alternatively, use a rule to bypass ike flows after the first packets like alert ike any any -> any any (sid: 2; flow.pkts_toserver: > 256; bypass; noalert;).

Record
CVE-2026-45769
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400, CWE-770
Updated
2026-11-02
OSV 7.5

ikev2: unbounded client transform storage can lead to resource exhaustion

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5,IKEv2 parser state could grow without bounds while storing client transforms. Repeated crafted UDP traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 fix the issue. Some workarounds are available. Disable IKE application-layer parsing if it is not needed. Alternatively, use a rule to bypass ike flows after the first packets like alert ike any any -> any any (sid: 2; flow.pkts_toserver: > 256; bypass; noalert;).

Record
CVE-2026-45769
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400, CWE-770
Updated
2026-11-02
OSVDEBIAN-CVE-2026-45769 7.5

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5,IKEv2 parser state could grow without bounds while storing client transforms. Repeated crafted UDP traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 fix the issue. Some workarounds are available. Disable IKE application-layer parsing if it is not needed. Alternatively, use a rule to bypass ike flows after the first packets like alert ike any any -> any any (sid: 2; flow.pkts_toserver: > 256; bypass; noalert;).

Record
DEBIAN-CVE-2026-45769
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-45769 7.5

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5,IKEv2 parser state could grow without bounds while storing client transforms. Repeated crafted UDP traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 fix the issue. Some workarounds are available. Disable IKE application-layer parsing if it is not needed. Alternatively, use a rule to bypass ike flows after the first packets like alert ike any any -> any any (sid: 2; flow.pkts_toserver: > 256; bypass; noalert;).

Record
UBUNTU-CVE-2026-45769
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2026:10885-1 No score

libsuricata8_0_5-8.0.5-1.1 on GA media

These are all security issues fixed in the libsuricata8_0_5-8.0.5-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10885-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
suricata
Debian:13
All versions, plus listed versions
1:7.0.10-11:7.0.10-1+deb13u11:7.0.10-1+deb13u21:7.0.10-1+deb13u31:7.0.10-1+deb13u4
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1:7.0.11-11:7.0.11-1~bpo13+11:8.0.0-1~exp11:8.0.0-1~exp21:8.0.0-1~exp41:8.0.0-1~exp51:8.0.1-11:8.0.1-21:8.0.1-31:8.0.1-3~bpo13+11:8.0.2-11:8.0.2-1~bpo13+11:8.0.3-11:8.0.3-1~bpo13+11:8.0.3-2~exp11:8.0.4-11:8.0.4-1~bpo13+11:8.0.5-11:8.0.5-1~bpo13+11:8.0.6-11:8.0.6-1~bpo13+11:8.0.7-11:8.0.7-1~bpo13+11:8.0.7-2~exp1
None known
suricata
Debian:14
before 1:8.0.5-1, plus listed versions
1:7.0.10-11:7.0.11-11:7.0.11-1~bpo13+11:8.0.0-1~exp11:8.0.0-1~exp2
Show 14 moreShow less
1:8.0.0-1~exp41:8.0.0-1~exp51:8.0.1-11:8.0.1-21:8.0.1-31:8.0.1-3~bpo13+11:8.0.2-11:8.0.2-1~bpo13+11:8.0.3-11:8.0.3-1~bpo13+11:8.0.3-2~exp11:8.0.4-11:8.0.4-1~bpo13+11:8.0.5-1~bpo13+1
1:8.0.5-1
suricata
Ubuntu:16.04:LTS
All versions, plus listed versions
2.0.8-1build12.0.9-12.0.10-12.0.10-22.0.11-13.0-1
None known
suricata
Ubuntu:18.04:LTS
All versions, plus listed versions
3.2-2ubuntu3
None known
suricata
Ubuntu:22.04:LTS
All versions, plus listed versions
1:6.0.4-21:6.0.4-3
None known
suricata
Ubuntu:24.04:LTS
All versions, plus listed versions
1:7.0.0-21:7.0.2-11:7.0.2-1build11:7.0.3-1build11:7.0.3-1build3
None known
suricata
Ubuntu:26.04:LTS
All versions, plus listed versions
1:7.0.10-11:8.0.1-3build11:8.0.2-11:8.0.2-1build11:8.0.3-1
None known
suricata
openSUSE:Tumbleweed
From an advisory covering 15 CVEs
before 8.0.5-1.1
8.0.5-1.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-45769 is a high vulnerability (CVSS 7.5) in Oisf Suricata, published May 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.79%, the 78th percentile. Fixed in suricata 1:8.0.5-1.

References

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