CVE-2025-36387
published 2026-01-30CVE-2025-36387: IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 - 11.5.9 could allow an authenticated user to cause a denial of service when given…
PriorityP430medium6.5CVSS 3.1
AVNACLPRLUINSUCNINAH
EPSS
0.35%
28.5th percentile
IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 - 11.5.9 could allow an authenticated user to cause a denial of service when given specially crafted query.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| ibm | db2 | 11.5.0 – 11.5.9 | — |
| msrc | azl3_httpd_2.4.58-4_on_azure_linux_3.0 | — | — |
| msrc | azl3_httpd_2.4.61-1_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_httpd_2.4.59-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_httpd_2.4.61-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv6.5MEDIUM
vendor_msrc5.4MEDIUM
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GHSA
GHSA-49g9-689m-w7vr: IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11
ghsa_unreviewed·2026-01-31
CVE-2025-36387 [MEDIUM] CWE-770 GHSA-49g9-689m-w7vr: IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11
IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 - 11.5.9 could allow an authenticated user to cause a denial of service when given specially crafted query.
OSV
CVE-2025-36387: IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11
osv·2026-01-30·CVSS 6.5
CVE-2025-36387 [MEDIUM] CVE-2025-36387: IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11
IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 - 11.5.9 could allow an authenticated user to cause a denial of service when given specially crafted query.
Microsoft
Apache HTTP Server: DoS by Null pointer in websocket over HTTP/2
vendor_msrc·2024-07-09·CVSS 5.4
CVE-2024-36387 [MEDIUM] CWE-476 Apache HTTP Server: DoS by Null pointer in websocket over HTTP/2
Apache HTTP Server: DoS by Null pointer in websocket over HTTP/2
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
apache: apache
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: ht
No detection rules found.
No public exploits indexed.
Wiz
CVE-2025-36387 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 6.5
CVE-2025-36387 [MEDIUM] CVE-2025-36387 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2025-36387 :
IBM Db2 vulnerability analysis and mitigation
IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 - 11.5.9 could allow an authenticated user to cause a denial of service when given specially crafted query.
Source : NVD
## 6.5
Score
Published January 30, 2026
Severity MEDIUM
CNA Score 6.5
Affected Technologies
IBM Db2
Linux Ubuntu
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 4.4
Exploitation Probability (EPSS) N/A
Affected packages and libraries
cpe:2.3:a:ibm:db2
linux-aws-fips
Sources
Ubuntu 16.04, 18.04, 20.04 Severity MEDIUM No Fix Added at: Feb 02, 2026
Linux Severity MEDIUM Has Fix Added at: Jan 31, 2026
Windows Severity MEDIUM H
Bugzilla
CVE-2024-36387 mod_http2: DoS by null pointer in websocket over HTTP/2
bugzilla·2024-07-01·CVSS 5.4
CVE-2024-36387 [MEDIUM] CVE-2024-36387 mod_http2: DoS by null pointer in websocket over HTTP/2
CVE-2024-36387 mod_http2: DoS by null pointer in websocket over HTTP/2
Serving WebSocket protocol upgrades over a HTTP/2 connection could result in a Null Pointer dereference, leading to a crash of the server process, degrading performance.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2024:8680 https://access.redhat.com/errata/RHSA-2024:8680
---
This issue has been addressed in the following products:
Red Hat JBoss Core Services
Via RHSA-2025:3453 https://access.redhat.com/errata/RHSA-2025:3453
---
This issue has been addressed in the following products:
JBoss Core Services on RHEL 7
JBoss Core Services for RHEL 8
Via RHSA-2025:3452 https://access.redhat.com/errata/RHSA-2025:3452
2026-01-30
Published