Common Weakness Enumeration
CWE-835
AllowedLoop with Unreachable Exit Condition ('Infinite Loop')
Abstraction: Base · Status: Incomplete
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
1150 vulnerabilities reference this CWE, most recent first.
CVE-2021-25664 (GCVE-0-2021-25664)
Vulnerability from cvelistv5 – Published: 2021-04-22 20:42 – Updated: 2025-03-11 09:47
VLAI
EPSS
VEX
Summary
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (All versions including affected IPv6 stack). The function that processes the Hop-by-Hop extension header in IPv6 packets and its options lacks any checks against the length field of the header, allowing attackers to put the function into an infinite loop by supplying arbitrary length values.
Severity
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_MISC |
| https://us-cert.cisa.gov/ics/advisories/icsa-21-103-05 | x_refsource_MISC |
| https://cert-portal.siemens.com/productcert/html/… |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | Capital Embedded AR Classic 431-422 |
Affected:
0 , < *
(custom)
|
|
| Siemens | Capital Embedded AR Classic R20-11 |
Affected:
0 , < V2303
(custom)
|
|
| Siemens | Nucleus NET |
Affected:
All versions
|
|
| Siemens | Nucleus ReadyStart V3 |
Affected:
0 , < V2017.02.4
(custom)
|
|
| Siemens | Nucleus ReadyStart V4 |
Affected:
0 , < V4.1.0
(custom)
|
|
| Siemens | Nucleus Source Code |
Affected:
0 , < *
(custom)
|
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CVE-2021-25663 (GCVE-0-2021-25663)
Vulnerability from cvelistv5 – Published: 2021-04-22 20:42 – Updated: 2025-03-11 09:47
VLAI
EPSS
VEX
Summary
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (All versions including affected IPv6 stack). The function that processes IPv6 headers does not check the lengths of extension header options, allowing attackers to put this function into an infinite loop with crafted length values.
Severity
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_MISC |
| https://us-cert.cisa.gov/ics/advisories/icsa-21-103-05 | x_refsource_CONFIRM |
| https://cert-portal.siemens.com/productcert/html/… |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | Capital Embedded AR Classic 431-422 |
Affected:
0 , < *
(custom)
|
|
| Siemens | Capital Embedded AR Classic R20-11 |
Affected:
0 , < V2303
(custom)
|
|
| Siemens | Nucleus NET |
Affected:
All versions
|
|
| Siemens | Nucleus ReadyStart V3 |
Affected:
0 , < V2017.02.4
(custom)
|
|
| Siemens | Nucleus ReadyStart V4 |
Affected:
0 , < V4.1.0
(custom)
|
|
| Siemens | Nucleus Source Code |
Affected:
0 , < *
(custom)
|
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CVE-2021-21279 (GCVE-0-2021-21279)
Vulnerability from cvelistv5 – Published: 2021-06-18 20:40 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Infinite loop in IPv6 neighbor solicitation processing
Summary
Contiki-NG is an open-source, cross-platform operating system for internet of things devices. In verions prior to 4.6, an attacker can perform a denial-of-service attack by triggering an infinite loop in the processing of IPv6 neighbor solicitation (NS) messages. This type of attack can effectively shut down the operation of the system because of the cooperative scheduling used for the main parts of Contiki-NG and its communication stack. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround.
Severity
7.5 (High)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/contiki-ng/contiki-ng/security… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| contiki-ng | contiki-ng |
Affected:
< 4.6
|
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CVE-2021-20270 (GCVE-0-2021-20270)
Vulnerability from cvelistv5 – Published: 2021-03-23 16:40 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the "exception" keyword.
Severity
No CVSS data available.
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1922136 | x_refsource_MISC |
| https://www.debian.org/security/2021/dsa-4889 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://www.oracle.com/security-alerts/cpuoct2021.html | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | python-pygments |
Affected:
python-pygments 2.7.4
|
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CVE-2021-20257 (GCVE-0-2021-20257)
Vulnerability from cvelistv5 – Published: 2022-03-16 14:12 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://www.openwall.com/lists/oss-security/2021/… | x_refsource_MISC |
| https://lists.gnu.org/archive/html/qemu-devel/202… | x_refsource_MISC |
| https://github.com/qemu/qemu/commit/3de46e6fc489c… | x_refsource_MISC |
| https://bugzilla.redhat.com/show_bug.cgi?id=1930087 | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2022042… | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/202208-27 | vendor-advisoryx_refsource_GENTOO |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
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CVE-2021-20255 (GCVE-0-2021-20255)
Vulnerability from cvelistv5 – Published: 2021-03-09 19:14 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1930646 | x_refsource_MISC |
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| https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeK… | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://security.netapp.com/advisory/ntap-2021050… | x_refsource_CONFIRM |
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CVE-2021-20041 (GCVE-0-2021-20041)
Vulnerability from cvelistv5 – Published: 2021-12-08 09:55 – Updated: 2024-08-03 17:30
VLAI
EPSS
VEX
Summary
An unauthenticated and remote adversary can consume all of the device's CPU due to crafted HTTP requests sent to SMA100 /fileshare/sonicfiles/sonicfiles resulting in a loop with unreachable exit condition. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.
Severity
No CVSS data available.
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://psirt.global.sonicwall.com/vuln-detail/SN… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SonicWall | SonicWall SMA100 |
Affected:
9.0.0.11-31sv and earlier
Affected: 10.2.0.8-37sv and earlier Affected: 10.2.1.1-19sv and earlier Affected: 10.2.1.2-24sv and earlier |
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CVE-2021-3737 (GCVE-0-2021-3737)
Vulnerability from cvelistv5 – Published: 2022-03-04 00:00 – Updated: 2025-12-17 21:32
VLAI
EPSS
VEX
Summary
A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-17 21:32 UTC
CWE
- CWE-835 - - Loop with Unreachable Exit Condition ('Infinite Loop'), CWE-400 - Uncontrolled Resource Consumption
Assigner
References
12 references
Impacted products
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CVE-2021-3508 (GCVE-0-2021-3508)
Vulnerability from cvelistv5 – Published: 2021-04-28 13:44 – Updated: 2024-08-03 16:53
VLAI
EPSS
VEX
Summary
A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in get_xref_linear_skipped() in pdf.c via a crafted PDF file.
Severity
No CVSS data available.
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1951198 | x_refsource_MISC |
| https://github.com/enferex/pdfresurrect/issues/17 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | PDFResurrect |
Affected:
PDFResurrect 0.23b
|
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CVE-2021-3468 (GCVE-0-2021-3468)
Vulnerability from cvelistv5 – Published: 2021-06-02 15:09 – Updated: 2025-02-13 16:28
VLAI
EPSS
VEX
Summary
A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.
Severity
No CVSS data available.
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1939614 | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
| https://lists.debian.org/debian-lts-announce/2023… |
Impacted products
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.