Common Weakness Enumeration
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CWE-820
Missing Synchronization
The product utilizes a shared resource in a concurrent manner but does not attempt to synchronize access to the resource.
CVE-2026-44318 (GCVE-0-2026-44318)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:35 – Updated: 2026-05-27 17:35
VLAI
EPSS
VEX
Title
free5GC: BSF concurrent PUT /nbsf-management/v1/subscriptions/{subId} crashes the BSF process via concurrent map read/write on Subscriptions
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's BSF PUT /nbsf-management/v1/subscriptions/{subId} handler has an unsynchronized write on the global Subscriptions map. The handler first reads the map under RLock() via BSFContext.GetSubscription(subId), but if the subscription does not exist, ReplaceIndividualSubcription() writes back to the same map directly without taking the mutex (bsfContext.BsfSelf.Subscriptions[subId] = subscription). Under concurrent authenticated PUT load, one goroutine can read while another writes the map, which causes the Go runtime to abort the process with fatal error: concurrent map read and map write (Go runtime panics that come from concurrent map access bypass recover() and terminate the process). The BSF container exits with code 2 -- the entire BSF SBI surface goes down until restart. This vulnerability is fixed in 4.2.2.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/926 | x_refsource_MISC |
| https://github.com/free5gc/bsf/pull/7 | x_refsource_MISC |
| https://github.com/free5gc/bsf/commit/277908565fd… | x_refsource_MISC |
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CVE-2026-57029 (GCVE-0-2026-57029)
Vulnerability from cvelistv5 – Published: 2026-07-09 21:12 – Updated: 2026-07-09 21:12
VLAI
EPSS
VEX
Title
Junos OS Evolved: QFX Series: When sFlow collector reachability changes evo-pfemand process can crash
Summary
A Missing Synchronization vulnerability in the flow collector handler of Juniper Networks Junos OS Evolved on QFX Series allows an adjacent, unauthenticated attacker to cause a Denial-of-Service (DoS).
When the reachability of an sFlow collector changes, the corresponding next-hop entry is updated. If this update occurs simultaneously with the sFlow thread accessing the next-hop data (which is outside the attackers control), it causes the evo-pfemand process to crash, impacting all traffic forwarding until the automatic process restart has completed.
This issue affects Junos OS Evolved on QFX Series:
* all 23.2 versions,
* 23.4 versions before 23.4R2-S7-EVO,
* 24.2 versions before 24.2R2-S5-EVO,
* 24.4 versions before 24.4R2-S3-EVO,
* 25.2 versions before 25.2R2-EVO.
Severity
CWE
- CWE-820 - Missing Synchronization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://supportportal.juniper.net/JSA110089 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Juniper Networks | Junos OS Evolved |
Affected:
0 , < 23.4R2-S7-EVO
(custom)
Affected: 24.2 , < 24.2R2-S5-EVO (custom) Affected: 24.4 , < 24.4R2-S3-EVO (custom) Affected: 25.2 , < 25.2R2-EVO (custom) |
Date Public
2026-07-08 16:00
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.