Common Weakness Enumeration
CWE-772
AllowedMissing 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.
591 vulnerabilities reference this CWE, most recent first.
GHSA-RR63-XXH8-9RG3
Vulnerability from github – Published: 2022-05-13 01:50 – Updated: 2022-05-13 01:50
VLAI
Details
ImageMagick 7.0.8-5 has a memory leak vulnerability in the function ReadOneJNGImage in coders/png.c.
Severity
6.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2018-16640"
],
"database_specific": {
"cwe_ids": [
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-09-06T22:29:00Z",
"severity": "MODERATE"
},
"details": "ImageMagick 7.0.8-5 has a memory leak vulnerability in the function ReadOneJNGImage in coders/png.c.",
"id": "GHSA-rr63-xxh8-9rg3",
"modified": "2022-05-13T01:50:24Z",
"published": "2022-05-13T01:50:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-16640"
},
{
"type": "WEB",
"url": "https://github.com/ImageMagick/ImageMagick/issues/1201"
},
{
"type": "WEB",
"url": "https://github.com/ImageMagick/ImageMagick/commit/76efa969342568841ecf320b5a041685a6d24e0b"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3785-1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-RR9P-XG7R-P8XG
Vulnerability from github – Published: 2022-05-13 01:07 – Updated: 2022-05-13 01:07
VLAI
Details
Memory leak in the keyboard input event handlers support in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (host memory consumption) by rapidly generating large keyboard events.
Severity
6.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2017-8379"
],
"database_specific": {
"cwe_ids": [
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-05-23T04:29:00Z",
"severity": "MODERATE"
},
"details": "Memory leak in the keyboard input event handlers support in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (host memory consumption) by rapidly generating large keyboard events.",
"id": "GHSA-rr9p-xg7r-p8xg",
"modified": "2022-05-13T01:07:31Z",
"published": "2022-05-13T01:07:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-8379"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2017:2408"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html"
},
{
"type": "WEB",
"url": "https://lists.gnu.org/archive/html/qemu-devel/2017-04/msg05599.html"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201706-03"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2017/05/03/2"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/98277"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-RRRW-3VQX-F9M3
Vulnerability from github – Published: 2022-05-24 17:46 – Updated: 2022-05-24 17:46
VLAI
Details
A memory buffer error vulnerability exists in a component interface of Huawei Smartphone. Local attackers can exploit this vulnerability to cause memory leakage and doS attacks by carefully constructing attack scenarios.
{
"affected": [],
"aliases": [
"CVE-2020-9146"
],
"database_specific": {
"cwe_ids": [
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-04-01T18:15:00Z",
"severity": "MODERATE"
},
"details": "A memory buffer error vulnerability exists in a component interface of Huawei Smartphone. Local attackers can exploit this vulnerability to cause memory leakage and doS attacks by carefully constructing attack scenarios.",
"id": "GHSA-rrrw-3vqx-f9m3",
"modified": "2022-05-24T17:46:02Z",
"published": "2022-05-24T17:46:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-9146"
},
{
"type": "WEB",
"url": "https://consumer.huawei.com/cn/support/bulletin/2021/1"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-RVX5-CGPM-65XR
Vulnerability from github – Published: 2022-05-13 01:14 – Updated: 2022-05-13 01:14
VLAI
Details
ImageMagick 7.0.6-2 has a memory leak vulnerability in WriteINLINEImage in coders/inline.c.
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2017-12666"
],
"database_specific": {
"cwe_ids": [
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-08-07T21:29:00Z",
"severity": "HIGH"
},
"details": "ImageMagick 7.0.6-2 has a memory leak vulnerability in WriteINLINEImage in coders/inline.c.",
"id": "GHSA-rvx5-cgpm-65xr",
"modified": "2022-05-13T01:14:46Z",
"published": "2022-05-13T01:14:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-12666"
},
{
"type": "WEB",
"url": "https://github.com/ImageMagick/ImageMagick/issues/572"
},
{
"type": "WEB",
"url": "https://github.com/ImageMagick/ImageMagick/commit/d5559407ce29f4371e5df9c1cbde65455fe5854c"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/100226"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-RWM7-X88C-3G2P
Vulnerability from github – Published: 2026-05-06 23:10 – Updated: 2026-07-24 19:05
VLAI
Summary
Netty epoll transport denial of service via RST on half-closed TCP connection
Details
Summary
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.
Affected versions
All versions of 4.2.x netty-transport-classes-epoll up to and including 4.2.12.Final
Fixed in
4.2.13.Final (fix merged into the 4.2 branch via #16689; release not yet cut as of 2026-04-25).
Severity
Medium — Denial of Service (resource exhaustion / CPU spin)
CVSS: 3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - 7.5
CWE: CWE-772: Missing Release of Resource after Effective Lifetime
Description
When a TCP connection using Netty's epoll transport has ALLOW_HALF_CLOSURE enabled (or is in a half-closed state via the HTTP codec), and the remote peer:
- Sends a FIN (half-close), causing the server to mark the input as shutdown, then
- Sends a RST (e.g. by closing with
SO_LINGER=0)
the server-side channel is never closed. This happens because:
epollOutReady()is a no-op when there is no pending flush.epollInReady()short-circuits viashouldBreakEpollInReady()because input is already marked as shutdown.- The
EPOLLERR/EPOLLHUPerror condition is therefore never processed, andchannelInactiveis never fired.
Depending on the Netty version and configuration, this results in:
- Stale channels: The connection is never closed or deregistered. An unauthenticated remote attacker can repeat the sequence to accumulate stale connections, exhausting file descriptors, memory, or connection-count limits.
- CPU busy-loop: In code paths where
clearEpollIn0()is not called during theChannelInputShutdownReadCompleteevent,epoll_waitreturns immediately on every iteration for the affected fd, causing 100% CPU utilization on the event loop thread and starving all other connections multiplexed on it.
Mitigation
- Upgrade to 4.2.13.Final when released (or build from the
4.2branch at commit0ec3d97). - If upgrading is not immediately possible, configure idle timeouts on connections to limit the lifetime of stale channels.
References
- Issue: https://github.com/netty/netty/issues/16683
- Fix: https://github.com/netty/netty/pull/16689
Severity
7.5 (High)
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-transport-classes-epoll"
},
"ranges": [
{
"events": [
{
"introduced": "4.2.0.Final"
},
{
"fixed": "4.2.13.Final"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-42577"
],
"database_specific": {
"cwe_ids": [
"CWE-772"
],
"github_reviewed": true,
"github_reviewed_at": "2026-05-06T23:10:41Z",
"nvd_published_at": "2026-05-13T19:17:23Z",
"severity": "HIGH"
},
"details": "## Summary\n\nNetty\u0027s 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.\n\n## Affected versions\n\nAll versions of 4.2.x `netty-transport-classes-epoll` up to and including 4.2.12.Final\n\n## Fixed in\n\n4.2.13.Final (fix merged into the `4.2` branch via [#16689](https://github.com/netty/netty/pull/16689); release not yet cut as of 2026-04-25).\n\n## Severity\n\n**Medium** \u2014 Denial of Service (resource exhaustion / CPU spin)\n\n**CVSS:** 3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - **7.5**\n\n**CWE:** CWE-772: Missing Release of Resource after Effective Lifetime\n\n## Description\n\nWhen a TCP connection using Netty\u0027s epoll transport has `ALLOW_HALF_CLOSURE` enabled (or is in a half-closed state via the HTTP codec), and the remote peer:\n\n1. Sends a FIN (half-close), causing the server to mark the input as shutdown, then\n2. Sends a RST (e.g. by closing with `SO_LINGER=0`)\n\nthe server-side channel is never closed. This happens because:\n\n- `epollOutReady()` is a no-op when there is no pending flush.\n- `epollInReady()` short-circuits via `shouldBreakEpollInReady()` because input is already marked as shutdown.\n- The `EPOLLERR`/`EPOLLHUP` error condition is therefore never processed, and `channelInactive` is never fired.\n\nDepending on the Netty version and configuration, this results in:\n\n- **Stale channels**: The connection is never closed or deregistered. An unauthenticated remote attacker can repeat the sequence to accumulate stale connections, exhausting file descriptors, memory, or connection-count limits.\n- **CPU busy-loop**: In code paths where `clearEpollIn0()` is not called during the `ChannelInputShutdownReadComplete` event, `epoll_wait` returns immediately on every iteration for the affected fd, causing 100% CPU utilization on the event loop thread and starving all other connections multiplexed on it.\n\n## Mitigation\n\n- Upgrade to 4.2.13.Final when released (or build from the `4.2` branch at commit [`0ec3d97`](https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d)).\n- If upgrading is not immediately possible, configure idle timeouts on connections to limit the lifetime of stale channels.\n\n## References\n\n- Issue: https://github.com/netty/netty/issues/16683\n- Fix: https://github.com/netty/netty/pull/16689",
"id": "GHSA-rwm7-x88c-3g2p",
"modified": "2026-07-24T19:05:52Z",
"published": "2026-05-06T23:10:41Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-rwm7-x88c-3g2p"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42577"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/pull/16689"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d"
},
{
"type": "PACKAGE",
"url": "https://github.com/netty/netty"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Netty epoll transport denial of service via RST on half-closed TCP connection"
}
GHSA-RXC8-WWJF-P7FP
Vulnerability from github – Published: 2026-08-05 18:31 – Updated: 2026-08-05 18:31
VLAI
Details
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.
This vulnerability is due to improper error handling when parsing SNMP requests. This vulnerability affects all versions of SNMP — Versions 1, 2c, and 3. An attacker could exploit this vulnerability by sending a malformed SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly. The attacker must have the SNMPv1 or v2c read-only or read-write community string or valid SNMPv3 user credentials on the affected device.
Severity
7.7 (High)
{
"affected": [],
"aliases": [
"CVE-2026-20124"
],
"database_specific": {
"cwe_ids": [
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-05T17:16:46Z",
"severity": "HIGH"
},
"details": "A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.\n\nThis vulnerability is due to improper error handling when parsing SNMP requests. This vulnerability affects all versions of SNMP \u0026mdash; Versions 1, 2c, and 3. An attacker could exploit this vulnerability by sending a malformed SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly. The attacker must have the SNMPv1 or v2c read-only or read-write community string or valid SNMPv3 user credentials on the affected device.",
"id": "GHSA-rxc8-wwjf-p7fp",
"modified": "2026-08-05T18:31:38Z",
"published": "2026-08-05T18:31:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20124"
},
{
"type": "WEB",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-snmp-dos-ZAqNm4MD"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-RXR2-QR3H-M2RP
Vulnerability from github – Published: 2022-05-13 01:42 – Updated: 2022-05-13 01:42
VLAI
Details
The ReadMATImage function in coders/mat.c in ImageMagick through 6.9.9-3 and 7.x through 7.0.6-3 has memory leaks involving the quantum_info and clone_info data structures.
Severity
6.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2017-11724"
],
"database_specific": {
"cwe_ids": [
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-07-29T05:29:00Z",
"severity": "MODERATE"
},
"details": "The ReadMATImage function in coders/mat.c in ImageMagick through 6.9.9-3 and 7.x through 7.0.6-3 has memory leaks involving the quantum_info and clone_info data structures.",
"id": "GHSA-rxr2-qr3h-m2rp",
"modified": "2022-05-13T01:42:29Z",
"published": "2022-05-13T01:42:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11724"
},
{
"type": "WEB",
"url": "https://github.com/ImageMagick/ImageMagick/issues/624"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201711-07"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/104597"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-V2G8-4FGQ-7RHX
Vulnerability from github – Published: 2022-05-24 17:07 – Updated: 2025-06-09 18:32
VLAI
Details
An issue was discovered in button_open in login/logind-button.c in systemd before 243. When executing the udevadm trigger command, a memory leak may occur.
Severity
{
"affected": [],
"aliases": [
"CVE-2019-20386"
],
"database_specific": {
"cwe_ids": [
"CWE-401",
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-01-21T06:15:00Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in button_open in login/logind-button.c in systemd before 243. When executing the udevadm trigger command, a memory leak may occur.",
"id": "GHSA-v2g8-4fgq-7rhx",
"modified": "2025-06-09T18:32:00Z",
"published": "2022-05-24T17:07:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20386"
},
{
"type": "WEB",
"url": "https://github.com/systemd/systemd/commit/b2774a3ae692113e1f47a336a6c09bac9cfb49ad"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZPCOMW5X6IZZXASCDD2CNW2DLF3YADC"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HZPCOMW5X6IZZXASCDD2CNW2DLF3YADC"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20200210-0002"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4269-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00014.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-V2Q9-M664-5F32
Vulnerability from github – Published: 2022-05-24 17:18 – Updated: 2022-05-24 17:18
VLAI
Details
CloudEngine 12800 products with versions of V200R019C00, V200R019C10SPC800, V200R019C00SPC600, V200R019C10; and CloudEngine 6800 products with versions of V200R019C00SPC800 have a denial of service vulnerability. Due to improper memory management, memory leakage may occur in some special cases. Attackers can perform a series of operations to exploit this vulnerability. Successful exploit may cause a denial of service.
{
"affected": [],
"aliases": [
"CVE-2020-1870"
],
"database_specific": {
"cwe_ids": [
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-05-29T20:15:00Z",
"severity": "MODERATE"
},
"details": "CloudEngine 12800 products with versions of V200R019C00, V200R019C10SPC800, V200R019C00SPC600, V200R019C10; and CloudEngine 6800 products with versions of V200R019C00SPC800 have a denial of service vulnerability. Due to improper memory management, memory leakage may occur in some special cases. Attackers can perform a series of operations to exploit this vulnerability. Successful exploit may cause a denial of service.",
"id": "GHSA-v2q9-m664-5f32",
"modified": "2022-05-24T17:18:51Z",
"published": "2022-05-24T17:18:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-1870"
},
{
"type": "WEB",
"url": "https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200527-01-dos-en"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-V34Q-J8XH-HJGX
Vulnerability from github – Published: 2024-07-09 00:31 – Updated: 2024-11-02 00:36
VLAI
Details
OpenVPN 2.6.10 and earlier in a server role accepts multiple exit notifications from authenticated clients which will extend the validity of a closing session
Severity
4.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2024-28882"
],
"database_specific": {
"cwe_ids": [
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-08T22:15:02Z",
"severity": "MODERATE"
},
"details": "OpenVPN 2.6.10 and earlier in a server role accepts multiple exit notifications from authenticated clients which will extend the validity of a closing session",
"id": "GHSA-v34q-j8xh-hjgx",
"modified": "2024-11-02T00:36:20Z",
"published": "2024-07-09T00:31:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-28882"
},
{
"type": "WEB",
"url": "https://community.openvpn.net/openvpn/wiki/CVE-2024-28882"
},
{
"type": "WEB",
"url": "https://www.mail-archive.com/openvpn-users@lists.sourceforge.net/msg07634.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
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.