Common Weakness Enumeration
CWE-191
AllowedInteger Underflow (Wrap or Wraparound)
Abstraction: Base · Status: Draft
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
886 vulnerabilities reference this CWE, most recent first.
CVE-2026-45813 (GCVE-0-2026-45813)
Vulnerability from cvelistv5 – Published: 2026-07-24 12:10 – Updated: 2026-07-24 18:18
VLAI
EPSS
VEX
Title
Apache NimBLE: Incorrect data validation in BASS add/modify source operation
Summary
Out-of-bounds Write, Integer Underflow (Wrap or Wraparound) vulnerability in Apache NimBLE BASS service.
Improper validation when parsing BASS service "Add Source" and "Modify Source" operation PDU could results in stack buffer overflow or arbitrary out-of-bound read.
This can be triggered by nearby devices over Bluetooth connection, however pairing is required prior to accessing BASS service, which depending on device configuration may or may not require user action.
This issue affects Apache NimBLE: through 1.9.0.
Users are recommended to upgrade to version 1.10.0, which fixes the issue.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-24 18:18 UTC
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache NimBLE |
Affected:
0 , ≤ 1.9.0
(semver)
|
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CVE-2026-45699 (GCVE-0-2026-45699)
Vulnerability from cvelistv5 – Published: 2026-08-14 19:05 – Updated: 2026-08-18 02:13
VLAI
EPSS
VEX
Title
Netatalk has Integer Underflow → Stack Buffer Overflow in copydir()
Summary
Netatalk is a Free and Open Source file server suite for Unix-like operating systems. In versions 3.1.19 through 4.4.2, a stack-based buffer overflow exists in the copydir() function of Netatalk's afpd daemon due to an integer underflow in the calculation of the remaining buffer size used for path construction. copydir() is a utility function called when a file operation crosses a device boundary inside an AFP shared volume, which the standard library's renameat() cannot handle. The function attempts to track available buffer space using srem and drem for source and destination paths. Incorrect arithmetic causes both srem and drem to underflow to SIZE_MAX. Consequently, boundary checks against strlen(de->d_name) always pass, allowing strcpy() to append filenames into nearly full stack buffers. Version 4.4.3 patches the issue. As a workaround, configure each AFP shared volume to be structured as a single file system, in other words no subdirectory of a shared volume should be a mount point for a different file system.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 02:13 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Netatalk/netatalk/security/adv… | x_refsource_CONFIRM |
| https://github.com/Netatalk/netatalk/releases/tag… | x_refsource_MISC |
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CVE-2026-45698 (GCVE-0-2026-45698)
Vulnerability from cvelistv5 – Published: 2026-08-17 18:21 – Updated: 2026-08-17 19:29
VLAI
EPSS
VEX
Title
Netatalk has Integer Underflow → Stack Buffer Overflow in deletedir()
Summary
Netatalk is a Free and Open Source file server suite for Unix-like operating systems. In versions 3.1.19 through 4.4.2, a stack-based buffer overflow exists in the deletedir() function of Netatalk's afpd daemon due to an integer underflow in the calculation of the remaining buffer size used for path construction. deletedir() is a utility function called when a file operation crosses a device boundary inside an AFP shared volume, which the standard library's renameat() cannot handle. The function attempts to prevent buffer overflows by tracking available space in a size_t remain variable. However, the arithmetic used to compute remain results in an unsigned integer underflow, causing the variable to become SIZE_MAX. Because of this, the subsequent boundary check always evaluates as safe, allowing an unbounded strcpy() operation to copy attacker-controlled filenames into a nearly full stack buffer. Version 4.4.3 patches the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 19:29 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Netatalk/netatalk/security/adv… | x_refsource_CONFIRM |
| https://github.com/Netatalk/netatalk/releases/tag… | x_refsource_MISC |
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CVE-2026-45469 (GCVE-0-2026-45469)
Vulnerability from cvelistv5 – Published: 2026-06-09 17:04 – Updated: 2026-09-24 13:43
VLAI
EPSS
VEX
Title
Microsoft Excel Remote Code Execution Vulnerability
Summary
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-05 00:00 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5556.1001
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.110.26061317
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.110.26061317
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.110.26061317
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20137
(custom)
|
Date Public
2026-06-09 14:00
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CVE-2026-45463 (GCVE-0-2026-45463)
Vulnerability from cvelistv5 – Published: 2026-06-09 17:05 – Updated: 2026-09-24 13:44
VLAI
EPSS
VEX
Title
Microsoft Office Remote Code Execution Vulnerability
Summary
Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 03:56 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2016 |
Affected:
16.0.0 , < 16.0.5556.1005
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.110.26061317
(custom)
|
|
| Microsoft | Microsoft Office for Android |
Affected:
16.0.1 , < 16.0.20131.20024
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.110.26061317
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.110.26061317
(custom)
|
Date Public
2026-06-09 14:00
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CVE-2026-44251 (GCVE-0-2026-44251)
Vulnerability from cvelistv5 – Published: 2026-07-17 00:01 – Updated: 2026-07-17 18:06
VLAI
EPSS
VEX
Title
Wazuh : size_t underflow in msgs.c ReadSecMSG causes wazuh-remoted DoS and potential heap overflow via crafted agent message
Summary
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Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 17:33 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/wazuh/wazuh/security/advisorie… | x_refsource_CONFIRM |
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CVE-2026-44235 (GCVE-0-2026-44235)
Vulnerability from cvelistv5 – Published: 2026-09-17 17:09 – Updated: 2026-09-17 17:43
VLAI
EPSS
VEX
Title
rabbitmq-c: size_t underflow in AMQP frame length computation leads to out-of-bounds read
Summary
rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to 0.16.0, a malicious AMQP server can send an undersized HEADER or METHOD frame during client login and cause unsigned size_t underflow in amqp_handle_input() in librabbitmq/amqp_connection.c. The parser subtracts HEADER_SIZE, fixed per-frame fields, and FOOTER_SIZE from state->target_size without first checking the minimum frame length. The wrapped encoded.len value is passed through amqp_decode_properties() to amqp_decode_table_internal(), where it defeats bounds checks and causes an out-of-bounds read and process crash. An on-path attacker can also trigger the issue when AMQP traffic is not protected by TLS with certificate validation. The demonstrated impact is denial of service, with no reliable memory disclosure or code execution shown. This issue is fixed in version 0.16.0.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 17:43 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/alanxz/rabbitmq-c/security/adv… | x_refsource_CONFIRM |
| https://github.com/alanxz/rabbitmq-c/pull/878 | x_refsource_MISC |
| https://github.com/alanxz/rabbitmq-c/commit/1d3af… | x_refsource_MISC |
| https://github.com/alanxz/rabbitmq-c/releases/tag… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| alanxz | rabbitmq-c |
Affected:
< 0.16.0
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CVE-2026-44069 (GCVE-0-2026-44069)
Vulnerability from cvelistv5 – Published: 2026-05-21 07:34 – Updated: 2026-05-21 12:52
VLAI
EPSS
VEX
Title
Integer underflow in volxlate
Summary
An integer underflow in the volxlate function in Netatalk 3.0.0 through 4.4.2 allows a local privileged user to obtain limited information, modify limited data, or cause a minor service disruption via crafted volume translation input.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-21 12:51 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://netatalk.io/security/CVE-2026-44069 | vendor-advisory |
Impacted products
Date Public
2026-05-13 00:00
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CVE-2026-44060 (GCVE-0-2026-44060)
Vulnerability from cvelistv5 – Published: 2026-05-21 07:34 – Updated: 2026-05-21 12:45
VLAI
EPSS
VEX
Title
Integer underflow in dsi_writeinit() leads to denial of service
Summary
An integer underflow in dsi_writeinit() in Netatalk 1.5.0 through 4.4.2 allows a remote unauthenticated attacker to cause a denial of service via a crafted DSI write request.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-21 12:45 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://netatalk.io/security/CVE-2026-44060 | vendor-advisory |
Impacted products
Date Public
2026-05-13 00:00
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CVE-2026-43916 (GCVE-0-2026-43916)
Vulnerability from cvelistv5 – Published: 2026-05-12 13:31 – Updated: 2026-05-13 14:38
VLAI
EPSS
VEX
Title
pam_authnft: Heap buffer overflow in NETLINK_SOCK_DIAG reply walker
Summary
pam_authnft is a PAM session module binding nftables firewall rules to authenticated sessions via cgroupv2 inodes. Prior to 0.2.0-alpha, a heap buffer over-read in peer_lookup_tcp (src/peer_lookup.c:134, prior to the fix) allowed a crafted NETLINK_SOCK_DIAG reply to slip past the message-size check, then dereference past the end of the allocation. This vulnerability is fixed in 0.2.0-alpha.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 14:32 UTC
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/identd-ng/pam_authnft/security… | x_refsource_CONFIRM |
| https://github.com/identd-ng/pam_authnft/pull/10 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| identd-ng | pam_authnft |
Affected:
< 0.2.0-alpha
|
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.