Common Weakness Enumeration

CWE-772

Allowed

Missing Release of Resource after Effective Lifetime

Abstraction: Base · Status: Draft

The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.

585 vulnerabilities reference this CWE, most recent first.

CVE-2026-73508 (GCVE-0-2026-73508)

Vulnerability from cvelistv5 – Published: 2026-08-13 14:27 – Updated: 2026-08-13 17:52
VLAI
Title
Netty: Memory Leak in DNS Record Decoder via Malformed Domain Names
Summary
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.dns.AbstractDnsRecord, io.netty.handler.codec.dns.DefaultDnsRecordDecoder.decodeRecord(), and io.netty.handler.codec.dns.DnsCodecUtil.decompressDomainName() failed to release retained or newly allocated ByteBuf objects when IDN.toASCII() or encodeDomainName() rejected a malformed domain name, allowing unauthenticated remote DNS packets to leak direct memory incrementally until denial of service. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 17:49 UTC
CWE
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
Impacted products
Vendor Product Version
netty netty Affected: < 4.1.136.Final
Affected: >= 4.2.0.Final, < 4.2.16.Final
Create a notification for this product.
Show details on NVD website

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CVE-2026-73215 (GCVE-0-2026-73215)

Vulnerability from cvelistv5 – Published: 2026-08-11 17:38 – Updated: 2026-08-13 14:14
VLAI
Title
The coturn server can end in a state where it does not accept more requests with "even-port" enabled.
Summary
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnports_allocate_even() in src/apps/relay/turn_ports.c marks the unused odd sibling port as TPS_TAKEN_ODD for an EVEN-PORT Allocate request with reservation bit R=0 even though no RTCP socket will release it, allowing an authenticated client to permanently exhaust the relay port pool and cause subsequent allocations to fail with STUN error 508. This issue is fixed in version 4.17.0.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:14 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
Impacted products
Vendor Product Version
coturn coturn Affected: < 4.17.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-64607 (GCVE-0-2026-64607)

Vulnerability from cvelistv5 – Published: 2026-07-31 10:12 – Updated: 2026-08-13 16:18
VLAI
Title
Apache HttpComponents Client: Connection Leak on Content-Encoding Decode Error Leads to Pool Exhaustion DoS
Summary
HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported `Content-Encoding` header value in the response message. Please note this defect does not affect HttpClient based on the async i/o model. This issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:24 UTC
CWE
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
Impacted products
Vendor Product Version
Apache Software Foundation Apache HttpComponents Client Affected: 5.0-alpha , ≤ 5.6.2 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-61387 (GCVE-0-2026-61387)

Vulnerability from cvelistv5 – Published: 2026-08-04 11:52 – Updated: 2026-08-04 15:02
VLAI
Summary
In Eclipse Milo versions 1.0.0 through 1.1.4, monitored-item quota accounting is not exception-safe: if item creation fails with an unchecked error, the server-global reservation is not restored. Deeply nested PubSub ExtensionObjects in a `CreateMonitoredItems` event filter can trigger a `StackOverflowError` during decoding, allowing an unauthenticated remote client to exhaust a finite global monitored-item quota and prevent all clients from creating new monitored items until restart. Existing monitored items and other server functions remain unaffected.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 14:28 UTC
Assigner
Impacted products
Vendor Product Version
Eclipse Foundation Eclipse Milo Affected: 1.0.0 , < 1.1.5 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-56444 (GCVE-0-2026-56444)

Vulnerability from cvelistv5 – Published: 2026-07-22 13:10 – Updated: 2026-07-22 13:58
VLAI
Title
Degradation of resolution service when 'discard-timeout' and 'serve-expired-client-timeout' are combined in unusual configuration
Summary
In NLnet Labs Unbound 1.20.0 up to and including 1.25.1, when Unbound is configured with 'serve-expired: yes' and 'serve-expired-client-timeout > discard-timeout > 0' (contrary to the suggested values), the discard-timeout branch during the serve expired logic drops an aged client reply without performing the correct accounting for the number of reply addresses for the query. Other identical branches outside of serve expired perform the correct decrement. Since the counter is never decremented in such scenario, it can reach the maximum limit and new clients for duplicate in-flight queries are silently dropped resulting in degradation of resolution service. A malicious actor can exploit the vulnerability by querying the resolver for a client-controlled slow-on-demand authoritative zone that can drive the counter past the threshold. Shipped defaults for 'serve-expired-client-timeout: 1800' and 'discard-timeout: 1900' make the branch unreachable.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 13:58 UTC
CWE
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version
NLnet Labs Unbound Affected: 1.20.0 , < 1.25.2 (semver)
Create a notification for this product.
Date Public
2026-07-22 00:00
Show details on NVD website

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CVE-2026-54786 (GCVE-0-2026-54786)

Vulnerability from cvelistv5 – Published: 2026-07-01 20:12 – Updated: 2026-07-02 12:44
VLAI
Title
Wasmtime: Leak in WASIp1 `fd_renumber` implementation
Summary
Wasmtime is a runtime for WebAssembly. All versions prior to 24.0.10; versions 25.0.0 through those before 36.0.11; versions 37.0.0 through those before 44.0.3; and versions 45.0.0 and 45.0.1 contain a native implementation of WASIp1 which suffers from a leak in the fd_renumber function where the file descriptor being renumbered to is not properly closed. Wasmtime's implementation erroneously only updated the table of descriptors for WASIp1 and didn't update the underlying table of descriptors used by the host. This behavior means that while fd_renumber works correctly from a guest's perspective it ends up leaking resources in the host that aren't cleaned up until the corresponding Store is destroyed. In a loop, guests can use fd_renumber to cause hosts to exhaust both resources and file descriptors. This bug only affects the native implementation of WASIp1, meaning that only runtimes which load core wasm modules and expose fd_renumber are affected. Runtimes are additionally only affected if they expose the ability to acquire a file descriptor, such as opening a file. For runtimes that deny access to files they are unaffected. This issue has been fixed in versions 24.0.10, 36.0.11, 44.0.3, and 45.0.2.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 12:44 UTC
CWE
  • CWE-772 - Missing Release of Resource after Effective Lifetime
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
bytecodealliance wasmtime Affected: < 24.0.10
Affected: >= 25.0.0, < 36.0.11
Affected: >= 37.0.0, < 44.0.3
Affected: >= 45.0.0, < 45.0.2
Create a notification for this product.
Show details on NVD website

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CVE-2026-49343 (GCVE-0-2026-49343)

Vulnerability from cvelistv5 – Published: 2026-08-07 22:18 – Updated: 2026-08-13 18:40
VLAI
Title
Klever-Go KVM: Throttler slot leak in trie account-data sync causes epoch bootstrap / state sync DoS
Summary
Klever-Go is the Go implementation of the Klever blockchain protocol. In versions prior to 1.7.18, the account-data trie syncers are vulnerable to a resource-exhaustion flaw that leaks bounded throttler slots on error paths. In syncDataTrie() (in both userAccountsSyncer.go and kappAccountsSyncer.go), StartProcessing() reserves a slot from the NumGoRoutinesThrottler, but the corresponding EndProcessing() is only called on the success path and on the duplicate-root early return. As a result, any error from trie.NewTrie(), trie.NewTrieSyncer(), or trieSyncer.StartSyncing() (including the network-dependent timeout path) permanently consumes one slot for the lifetime of the throttler. An attacker who can repeatedly cause trie-node sync failures or timeouts during bootstrap can exhaust the bounded throttler, after which further account-data trie syncs stop making progress and SyncAccounts() returns a timeout. Because epoch bootstrap in syncUserAccountsState() and syncKappAccountsState() aborts on any such error, this causes bootstrap to fail, a core availability issue affecting fresh, restarting, or resyncing nodes and validators. This issue is fixed in version 1.7.18.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 18:40 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version
klever-io klever-go Affected: < 1.7.18
Create a notification for this product.
Show details on NVD website

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CVE-2026-45536 (GCVE-0-2026-45536)

Vulnerability from cvelistv5 – Published: 2026-06-12 14:12 – Updated: 2026-06-12 15:05
VLAI
Title
Netty: Unix-socket fd receive leaks descriptors when peer sends two at once
Summary
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, netty_unix_socket_recvFd sets msg_control to `char control[CMSG_SPACE(sizeof(int))]` (line 940) — 24 bytes on 64-bit Linux. A peer-sent SCM_RIGHTS cmsg carrying two ints has cmsg_len = CMSG_LEN(8) = 24, which fits exactly with no MSG_CTRUNC, so the kernel installs both fds in the receiving process. The subsequent check `cmsg->cmsg_len == CMSG_LEN(sizeof(int))` (line 972, expected 20) fails, the branch that would read the fd is skipped, and neither installed fd is closed. The for(;;) loop calls recvmsg again (non-blocking → EAGAIN → Java maps to 0 → read loop exits normally), leaving two leaked fds per message. There is no MSG_CTRUNC handling. Reachable via Epoll/KQueue DomainSocketChannel when the application opts into DomainSocketReadMode.FILE_DESCRIPTORS (non-default). Versions 4.1.135.Final and 4.2.15.Final patch the issue.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-12 15:05 UTC
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
Impacted products
Vendor Product Version
netty netty Affected: >= 4.2.0.Final, < 4.2.15.Final
Affected: < 4.1.135.Final
Create a notification for this product.
Show details on NVD website

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CVE-2026-45287 (GCVE-0-2026-45287)

Vulnerability from cvelistv5 – Published: 2026-06-04 14:45 – Updated: 2026-06-08 18:27
VLAI
Title
OpenTelemetry-Go's Schema ParseFile leaks file descriptors on each parse
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.0.17, `go.opentelemetry.io/otel/schema/v1.0` and `go.opentelemetry.io/otel/schema/v1.1` leaks one file descriptor on each successful `ParseFile` call. `ParseFile` opens the schema file and passes it to `Parse` without closing it; repeated parsing in a long-running process can exhaust the process file descriptor limit and cause denial of service. Exploitation depends on a consuming application exposing repeated schema parsing to an attacker-controlled path. Version 0.0.17 contains a patch for the issue.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-08 18:27 UTC
CWE
  • CWE-772 - Missing Release of Resource after Effective Lifetime
  • CWE-775 - Missing Release of File Descriptor or Handle after Effective Lifetime
Assigner
Show details on NVD website

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CVE-2026-42577 (GCVE-0-2026-42577)

Vulnerability from cvelistv5 – Published: 2026-05-13 18:00 – Updated: 2026-05-14 15:39
VLAI
Title
Netty: epoll transport denial of service via RST on half-closed TCP connection
Summary
Netty is an asynchronous, event-driven network application framework. From 4.2.0.Final to 4.2.13.Final , Netty's epoll transport fails to detect and close TCP connections that receive a RST after being half-closed, leading to stale channels that are never cleaned up and, in some code paths, a 100% CPU busy-loop in the event loop thread. This vulnerability is fixed in 4.2.13.Final.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-14 15:38 UTC
CWE
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
Impacted products
Vendor Product Version
netty netty Affected: >= 4.2.0.Final, < 4.2.13.Final
Create a notification for this product.
Show details on NVD website

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Mitigation MIT-3
Requirements

Strategy: Language Selection

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
  • For example, languages such as Java, Ruby, and Lisp perform automatic garbage collection that releases memory for objects that have been deallocated.
Mitigation
Implementation

It is good practice to be responsible for freeing all resources you allocate and to be consistent with how and where you free resources in a function. If you allocate resources that you intend to free upon completion of the function, you must be sure to free the resources at all exit points for that function including error conditions.

Mitigation MIT-47
Operation Architecture and Design

Strategy: Resource Limitation

  • Use resource-limiting settings provided by the operating system or environment. For example, when managing system resources in POSIX, setrlimit() can be used to set limits for certain types of resources, and getrlimit() can determine how many resources are available. However, these functions are not available on all operating systems.
  • When the current levels get close to the maximum that is defined for the application (see CWE-770), then limit the allocation of further resources to privileged users; alternately, begin releasing resources for less-privileged users. While this mitigation may protect the system from attack, it will not necessarily stop attackers from adversely impacting other users.
  • Ensure that the application performs the appropriate error checks and error handling in case resources become unavailable (CWE-703).
CAPEC-469: HTTP DoS

An attacker performs flooding at the HTTP level to bring down only a particular web application rather than anything listening on a TCP/IP connection. This denial of service attack requires substantially fewer packets to be sent which makes DoS harder to detect. This is an equivalent of SYN flood in HTTP. The idea is to keep the HTTP session alive indefinitely and then repeat that hundreds of times. This attack targets resource depletion weaknesses in web server software. The web server will wait to attacker's responses on the initiated HTTP sessions while the connection threads are being exhausted.