CVE-2026-21914
Essential information
- Published
- 15/01/2026 21:16
- Modified
- 16/01/2026 15:55
- Author
- —
- Creator
- —
- CVSS
- 8.7 HIGH (v3) 8.7 HIGH (v4.0)
- CISA KEV
- No
- CWE
- —
- CVSS vector
-
—
—
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X
CVSS metrics
- Access vector
- —
- Access complexity
- —
- Authentication
- —
- Confidentiality impact
- —
- Integrity impact
- —
- Availability impact
- —
- Exploitability
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- —
- Attack complexity
- —
- Privileges required
- —
- User interaction
- —
- Scope
- —
- Confidentiality impact
- —
- Integrity impact
- —
- Availability impact
- —
- Exploit code maturity
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- NETWORK
- Attack complexity
- LOW
- Attack requirements
- NONE
- Privileges required
- NONE
- User interaction
- NONE
- Confidentiality (V)
- NONE
- Confidentiality (S)
- NONE
- Integrity (V)
- NONE
- Integrity (S)
- NONE
- Availability (V)
- HIGH
- Availability (S)
- LOW
- Exploit maturity
- NOT_DEFINED
Description
An Improper Locking vulnerability in the GTP plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (Dos).
If an SRX Series device receives a specifically malformed GPRS Tunnelling Protocol (GTP) Modify Bearer Request message, a lock is acquired and never released. This results in other threads not being able to acquire a lock themselves, causing a watchdog timeout leading to FPC crash and restart. This issue leads to a complete traffic outage until the device has automatically recovered.
This issue affects Junos OS on SRX Series:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2-S6,
* 24.2 versions before 24.2R2-S3,
* 24.4 versions before 24.4R2-S2,
* 25.2 versions before 25.2R1-S1, 25.2R2.
NVD status
- Status
- Awaiting Analysis — CVE has been recently published to the CVE List and has been received by the NVD.
- Source
- [email protected]
- NVD
- View on NVD
Affected products (CPE)
| Product | CPE |
|---|---|
| juniper networks / junos os | cpe:2.3:a:juniper_networks:junos_os:<22.4R3-S8:*:*:*:*:*:* |
| juniper networks / junos os | cpe:2.3:a:juniper_networks:junos_os:23.2:<23.2R2-S5:*:*:*:*:*:* |
| juniper networks / junos os | cpe:2.3:a:juniper_networks:junos_os:23.4:<23.4R2-S6:*:*:*:*:*:* |
| juniper networks / junos os | cpe:2.3:a:juniper_networks:junos_os:24.2:<24.2R2-S3:*:*:*:*:*:* |
| juniper networks / junos os | cpe:2.3:a:juniper_networks:junos_os:24.4:<24.4R2-S2:*:*:*:*:*:* |
| juniper networks / junos os | cpe:2.3:a:juniper_networks:junos_os:25.2:<25.2R1-S1:*:*:*:*:*:* |
| juniper networks / junos os | cpe:2.3:a:juniper_networks:junos_os:25.2:<25.2R2:*:*:*:*:*:* |