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.
449 vulnerabilities reference this CWE, most recent first.
CVE-2026-57452 (GCVE-0-2026-57452)
Vulnerability from cvelistv5 – Published: 2026-06-25 15:27 – Updated: 2026-06-25 15:47
VLAI
EPSS
VEX
Title
Vim: Out-of-bounds Read with libsodium-encrypted Files
Summary
Vim is an open source, command line text editor. Prior to 9.2.0671, when Vim opens a file encrypted with the VimCrypt~04! or VimCrypt~05!
method (xchacha20poly1305, requires the +sodium feature) whose body is shorter than a single libsodium secretstream header, an unsigned length calculation underflows and a subsequent decryption call reads far past the end of the input buffer, crashing Vim. This vulnerability is fixed in 9.2.0671.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 15:47 UTC
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/vim/vim/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/vim/vim/commit/c8777cec25dcfae… | x_refsource_MISC |
| https://github.com/vim/vim/releases/tag/v9.2.0671 | x_refsource_MISC |
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CVE-2026-56386 (GCVE-0-2026-56386)
Vulnerability from cvelistv5 – Published: 2026-10-21 11:37 – Updated: 2026-10-21 13:07
VLAI
EPSS
VEX
Title
Apache bRPC: Integer Underflow and Out-of-Bounds Read in HTTP/2 DATA Frame Parser
Summary
Integer underflow and out-of-bounds read in the HTTP/2 server DATA frame parser in Apache bRPC allows an unauthenticated remote attacker to cause denial of service by sending a malformed DATA frame with the PADDED flag set and a zero-length payload.
Root Cause:
The HTTP/2 DATA frame handler computed the fragment size from the attacker-controlled payload length and, when the PADDED flag was present, decremented the fragment size before ensuring that the frame contained the mandatory pad length byte. A zero-length padded DATA frame could therefore underflow the unsigned fragment size and read the pad length byte past the end of the frame buffer.
Affected Scenarios:
Apache bRPC servers that accept HTTP/2 traffic are affected when a remote client can send crafted HTTP/2 frames to the server. HTTP/2 may be reached through cleartext h2c detection on an HTTP port or through TLS ALPN negotiation.
How to Fix:
(Choose one of the following options)
1. Upgrade Apache bRPC to version 1.18.0, which fixes this issue.
2. Apply this patch: https://github.com/apache/brpc/pull/3325
Note:
The fix validates that a padded DATA frame has enough payload bytes for the pad length field before decrementing the fragment size or reading the pad length byte. Malformed zero-length padded DATA frames are rejected with HTTP/2 FRAME_SIZE_ERROR.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-21 13:07 UTC
Assigner
apache
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/2pf15ojj0vr7rtx95… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache bRPC |
Affected:
0 , < 1.18.0
(semver)
|
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CVE-2026-55490 (GCVE-0-2026-55490)
Vulnerability from cvelistv5 – Published: 2026-07-07 21:08 – Updated: 2026-07-08 13:52
VLAI
EPSS
VEX
Title
OpenWrt: EAD Integer Underflow → Pre-Auth Denial of Service
Summary
OpenWrt is a Linux operating system targeting embedded devices. Before v25.12.5, an integer underflow in handle_send_a() of the Emergency Access Daemon allows any unauthenticated attacker on the local network to crash the daemon by sending a single crafted UDP packet. The message length underflows before a bounds check and is then passed to memcpy as a very large size. This issue is fixed v25.12.5.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:51 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/openwrt/openwrt/security/advis… | x_refsource_CONFIRM |
| https://github.com/openwrt/openwrt/commit/63c0767… | x_refsource_MISC |
| https://github.com/openwrt/openwrt/releases/tag/v… | x_refsource_MISC |
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CVE-2026-55039 (GCVE-0-2026-55039)
Vulnerability from cvelistv5 – Published: 2026-07-14 17:08 – Updated: 2026-11-01 17:36
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 2026-07-10 00:00 UTC
Assigner
microsoft
CNA
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 , < 16.0.5561.1001
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.111.26071215
(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 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.111.26071215
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20175
(custom)
|
Date Public
2026-07-14 14:00
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CVE-2026-55011 (GCVE-0-2026-55011)
Vulnerability from cvelistv5 – Published: 2026-07-14 17:05 – Updated: 2026-11-01 17:32
VLAI
EPSS
VEX
Title
Microsoft Defender Remote Code Execution Vulnerability
Summary
Integer underflow (wrap or wraparound) in Microsoft Defender 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 2026-07-13 00:00 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft Malware Protection Engine |
Affected:
1.1.0.0 , < 1.1.26060.3008
(custom)
cpe:2.3:a:microsoft:malware_protection_engine:*:*:*:*:*:*:*:* |
Date Public
2026-07-14 14:00
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CVE-2026-54982 (GCVE-0-2026-54982)
Vulnerability from cvelistv5 – Published: 2026-07-14 17:04 – Updated: 2026-11-01 17:32
VLAI
EPSS
VEX
Title
Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability
Summary
Integer underflow (wrap or wraparound) in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 03:59 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
18 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.14393.0 , < 10.0.14393.9339
(custom)
|
|
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.17763.0 , < 10.0.17763.9020
(custom)
|
|
| Microsoft | Windows 10 Version 21H2 |
Affected:
10.0.19044.0 , < 10.0.19044.7548
(custom)
|
|
| Microsoft | Windows 10 Version 22H2 |
Affected:
10.0.19045.0 , < 10.0.19045.7548
(custom)
|
|
| Microsoft | Windows 11 Version 24H2 |
Affected:
10.0.26100.0 , < 10.0.26100.8875
(custom)
|
|
| Microsoft | Windows 11 Version 25H2 |
Affected:
10.0.26200.0 , < 10.0.26200.8875
(custom)
|
|
| Microsoft | Windows 11 version 26H1 |
Affected:
10.0.28000.0 , < 10.0.28000.2525
(custom)
|
|
| Microsoft | Windows Server 2012 |
Affected:
6.2.9200.0 , < 6.2.9200.26226
(custom)
|
|
| Microsoft | Windows Server 2012 (Server Core installation) |
Affected:
6.2.9200.0 , < 6.2.9200.26226
(custom)
|
|
| Microsoft | Windows Server 2012 R2 |
Affected:
6.3.9600.0 , < 6.3.9600.23291
(custom)
|
|
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
Affected:
6.3.9600.0 , < 6.3.9600.23291
(custom)
|
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < 10.0.14393.9339
(custom)
|
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < 10.0.14393.9339
(custom)
|
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < 10.0.17763.9020
(custom)
|
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < 10.0.17763.9020
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.5386
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.33158
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.33158
(custom)
|
Date Public
2026-07-14 14:00
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CVE-2026-54890 (GCVE-0-2026-54890)
Vulnerability from cvelistv5 – Published: 2026-07-27 15:39 – Updated: 2026-07-28 09:55
VLAI
EPSS
VEX
Title
BEAM VM crash via integer underflow in binary_to_term BIT_BINARY_EXT decoding
Summary
Integer Underflow (Wrap or Wraparound) vulnerability in erlang otp erlang/otp (erts modules), erlang otp erts (erts modules) allows Forced Integer Overflow, Excessive Allocation. This vulnerability is associated with program files erts/emulator/beam/external.c, emulator/beam/external.c.
The BIT_BINARY_EXT tag (77) handler in the External Term Format (ETF) decoder accepts an encoding with both length and trailing-bits fields set to zero. The subsequent computation of the bitstring size underflows an unsigned integer, producing a value of roughly 2^64 that is then passed as a memory allocation size. The allocator aborts the entire node with a message such as "Cannot allocate 2305843009213693951 bytes of memory (of type binary)".
The crash is a VM-level abort, not an Erlang-level exception. It cannot be intercepted by supervision trees, by try/catch, or by passing the [safe] option to binary_to_term/2 (which only restricts atom creation and does not perform structural validation of binary encodings).
Any application that decodes ETF from untrusted sources via binary_to_term/1,2 or enif_binary_to_term() is exposed. The Erlang distribution protocol also decodes incoming terms through the same code path, but distribution is expected to run on trusted networks per the OTP Secure Coding Guidelines (DSG-011).
This issue affects OTP from OTP 27.0 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to erts from 15.0 before 17.0.4, 16.4.0.4 and 15.2.7.11.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-27 18:18 UTC
CWE
Assigner
EEF
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/erlang/otp/security/advisories… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-54890.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-54890 | related |
| https://www.erlang.org/doc/system/versions.html#o… | x_version-scheme |
| https://github.com/erlang/otp/commit/dc1bf9344c0c… | patch |
Impacted products
2 products
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CVE-2026-54754 (GCVE-0-2026-54754)
Vulnerability from cvelistv5 – Published: 2026-08-28 16:20 – Updated: 2026-08-31 18:52
VLAI
EPSS
VEX
Title
Klever-Go: Marketplace settlement mints KLV when referral % + royalty % exceed the bid (negative seller share silently skipped)
Summary
Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.19, marketplace settlement in core/kapp/market/market.go reads MarketOrderData.ReferralPercentage from the listing while reading asset.Royalties.MarketPercentage live at purchase time. An asset owner can create a valid listing and then use AssetTrigger UpdateRoyalties to make the combined referral and royalty percentages exceed the bid. executeBuyMarket pays referral and royalty amounts unconditionally while computeMarketOwnerAmount silently skips a nonpositive seller remainder, allowing MarketBuy, BuyItNow, or auction Claim settlement to credit more KLV or sale currency than the buyer paid. This can create unbacked currency and corrupt token supply integrity. This issue is fixed in version 1.7.19.
Severity
9.6 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:51 UTC
CWE
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/klever-io/klever-go/security/a… | x_refsource_CONFIRM |
| https://github.com/klever-io/klever-go/commit/8bc… | x_refsource_MISC |
| https://github.com/klever-io/klever-go/releases/t… | x_refsource_MISC |
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CVE-2026-54413 (GCVE-0-2026-54413)
Vulnerability from cvelistv5 – Published: 2026-06-14 17:38 – Updated: 2026-08-10 11:44
VLAI
EPSS
VEX
Title
iso14229 Integer Underflow and Out-of-Bounds Read in Handle_0x27_SecurityAccess()
Summary
driftregion iso14229 through 0.9.0 contains an integer underflow and downstream out-of-bounds read in the Handle_0x27_SecurityAccess function in iso14229.c that allows a remote unauthenticated attacker to crash a UDS server and potentially read memory past the receive buffer by sending a single-byte 0x27 SecurityAccess request that follows any earlier well-formed 0x27 message.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-15 15:08 UTC
Assigner
TuranSec
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/driftregion/iso14229 | product |
| https://github.com/driftregion/iso14229/blob/main… | product |
| https://cwe.mitre.org/data/definitions/191.html | technical-description |
| https://cwe.mitre.org/data/definitions/125.html | technical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| driftregion | iso14229 |
Affected:
0 , ≤ 0.9.0
(semver)
|
Date Public
2026-06-14 17:38
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CVE-2026-54412 (GCVE-0-2026-54412)
Vulnerability from cvelistv5 – Published: 2026-06-14 17:26 – Updated: 2026-11-05 12:44
VLAI
EPSS
VEX
Title
MQTT-C Heap Out-of-Bounds Read and Integer Underflow in mqtt_unpack_publish_response()
Summary
LiamBindle MQTT-C versions prior to 1.1.7 contain a heap-based out-of-bounds read and integer underflow in the mqtt_unpack_publish_response() function in src/mqtt.c. A remote unauthenticated attacker controlling an MQTT broker, or capable of injecting MQTT traffic into an unencrypted session, can crash a subscribed MQTT-C client and potentially disclose adjacent heap memory by sending a single crafted PUBLISH packet.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-15 17:01 UTC
Assigner
TuranSec
CNA
References
6 references
| URL | Tags |
|---|---|
| https://github.com/LiamBindle/MQTT-C | product |
| https://github.com/LiamBindle/MQTT-C/blob/v1.1.6/… | product |
| https://github.com/LiamBindle/MQTT-C/pull/208 | patch |
| https://github.com/LiamBindle/MQTT-C/releases/tag… | release-notespatch |
| https://cwe.mitre.org/data/definitions/125.html | technical-description |
| https://cwe.mitre.org/data/definitions/191.html | technical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| LiamBindle | MQTT-C |
Affected:
0 , < 1.1.7
(semver)
Unaffected: 1.1.7 (semver) |
Date Public
2026-06-14 17:26
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.