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.
873 vulnerabilities reference this CWE, most recent first.
CVE-2026-110714 (GCVE-0-2026-110714)
Vulnerability from cvelistv5 – Published: 2026-10-14 15:01 – Updated: 2026-10-14 15:01
VLAI
EPSS
VEX
Title
libsmb2 through 6.2 Heap Out-of-Bounds Read via decode_acl Integer Underflow
Summary
libsmb2 through 6.2 contains an integer underflow vulnerability in decode_acl that allows malicious SMB servers to trigger heap out-of-bounds reads via crafted security descriptors. Attackers controlling a server or intercepting unsigned sessions can send an AclSize below 8 in a QUERY_INFO reply, bypassing ACE bounds checks and crashing the client.
Severity
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://hackmd.io/@haind-pwn/libsmb2-query-info-r… | technical-descriptionexploit |
| https://github.com/sahlberg/libsmb2/blob/d67e213a… | technical-description |
| https://github.com/sahlberg/libsmb2/commit/523abe… | patch |
| https://github.com/sahlberg/libsmb2 | product |
| https://www.vulncheck.com/advisories/libsmb2-thro… | third-party-advisory |
Date Public
2026-07-10 00:00
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CVE-2026-109246 (GCVE-0-2026-109246)
Vulnerability from cvelistv5 – Published: 2026-10-12 16:04 – Updated: 2026-10-12 16:04
VLAI
EPSS
VEX
Title
FreeRDP before 3.32.0 Shadow Server Divide-by-Zero via Frame Acknowledge PDU
Summary
FreeRDP before 3.32.0 contains a divide-by-zero vulnerability in the freerdp-shadow-cli shadow server: the frame id in a client's Frame Acknowledge PDU is stored without a range check, so the in-flight frame count in shadow_encoder_inflight_frames() can underflow. An authenticated client can acknowledge a frame id one greater than the last frame sent, causing shadow_encoder_create_frame_id() to divide by zero (SIGFPE) and terminate the process, disconnecting all viewers.
Severity
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/freerdp-befo… | third-party-advisory |
Impacted products
Date Public
2026-09-28 00:00
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CVE-2026-107836 (GCVE-0-2026-107836)
Vulnerability from cvelistv5 – Published: 2026-10-09 17:49 – Updated: 2026-10-09 18:00
VLAI
EPSS
VEX
Title
RIOT: nanoCoAP Block2 client slice handling underflows on inconsistent server-controlled block size
Summary
RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. In 2026.07 and earlier, the nanoCoAP client function nanocoap_sock_get_slice() in sys/net/application_layer/nanocoap/sock.c accepts a Block2 response when _block_cb() sees the expected block number without also verifying that the server-controlled szx and derived offset match the requested block geometry. A malicious CoAP server can return the expected block number with a larger block size, causing the derived offset to exceed the client slice offset and making ctx->offset - offset underflow in _2buf_slice(). The resulting buffer-relative calculation can read before the payload buffer and crash the client, causing denial of service and potentially exposing adjacent memory. No fixed release is available as of this review.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 17:59 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RIOT-OS/RIOT/security/advisori… | x_refsource_CONFIRM |
| https://github.com/RIOT-OS/RIOT/pull/22518 | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/commit/49b894cbe0… | x_refsource_MISC |
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CVE-2026-107794 (GCVE-0-2026-107794)
Vulnerability from cvelistv5 – Published: 2026-10-10 12:45 – Updated: 2026-10-10 12:45
VLAI
EPSS
VEX
Title
ExtUtils::Typemaps::STL::List versions before 1.07 for Perl allocate a 32 GiB array on an empty list
Summary
ExtUtils::Typemaps::STL::List versions before 1.07 for Perl allocate a 32 GiB array on an empty list.
The OUTPUT typemaps call av_extend( av, len-1 ). On an empty list, this undeflows, and av_extend will allocate an array with 2^32 slots, leading to memory exhaustion.
Note that a similar issue was fixed in ExtUtils::Typemaps::STL::Vector version 1.05.
Severity
No CVSS data available.
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://metacpan.org/release/SMUELLER/ExtUtils-Ty… | release-notes |
| https://rt.cpan.org/Public/Bug/Display.html?id=91213 | relatedissue-tracking |
| https://www.cve.org/CVERecord?id=CVE-2013-10076 | related |
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CVE-2026-107635 (GCVE-0-2026-107635)
Vulnerability from cvelistv5 – Published: 2026-10-08 14:10 – Updated: 2026-10-08 16:05
VLAI
EPSS
VEX
Title
Dislocker through 0.7.3 Out-of-Bounds Heap Read via VMK/FVEK Datum Size Underflow
Summary
Dislocker through 0.7.3 contains an integer underflow vulnerability in get_vmk() and get_fvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes. Attackers can supply a malicious BitLocker volume image with a datum_size smaller than the 36-byte AES-CCM header, causing hexdump() to over-read and crash dislocker.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 16:05 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/Aorimn/dislocker/commit/070646… | patch |
| https://github.com/Aorimn/dislocker/blob/v0.7.3/s… | technical-description |
| https://github.com/Aorimn/dislocker/blob/v0.7.3/s… | technical-description |
| https://github.com/Aorimn/dislocker | product |
| https://www.vulncheck.com/advisories/dislocker-th… | third-party-advisory |
Date Public
2026-08-31 00:00
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CVE-2026-107614 (GCVE-0-2026-107614)
Vulnerability from cvelistv5 – Published: 2026-10-08 13:39 – Updated: 2026-10-08 14:01
VLAI
EPSS
VEX
Title
Integer underflow in TightVNC Server cursor shape trimming leads to out-of-bounds read
Summary
An integer underflow in WinCursorShapeUtils::trimTransparent() in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to crash the server, and potentially read out-of-bounds memory, by causing a cursor shape with a width or height of zero to be processed on the DXGI capture path. The loop bound width - 1 wraps to 0xFFFFFFFF, producing an access roughly 4 GB beyond the 64 KB cursor buffer; a monochrome cursor of height 1 also becomes 0 because getCursorHeight() halves the height in place.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 14:00 UTC
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://sourceforge.net/p/vnc-tight/bugs/1661/ | issue-tracking |
| https://www.tightvnc.com/whatsnew.php | release-notespatch |
Impacted products
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CVE-2026-106464 (GCVE-0-2026-106464)
Vulnerability from cvelistv5 – Published: 2026-10-14 17:41 – Updated: 2026-10-14 17:41
VLAI
EPSS
VEX
Summary
`_nx_secure_x509_parse_signature_data` computes the certificate signature's length as `tlv_length - 1` without first checking that `tlv_length` is non-zero. A certificate whose signature is an empty ASN.1 BIT STRING therefore parses successfully and leaves the certificate holding a signature length of `0xFFFFFFFF` and a signature pointer one byte past the end of the buffer. Certificates are parsed from the peer during the TLS handshake, so the input is remote and unauthenticated.
Severity
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | NetX Duo |
Affected:
0 , ≤ 6.5.2.202603
(custom)
Unaffected: 6.5.2.202603a |
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CVE-2026-106437 (GCVE-0-2026-106437)
Vulnerability from cvelistv5 – Published: 2026-10-08 18:42 – Updated: 2026-10-08 19:20
VLAI
EPSS
VEX
Title
Out-of-bounds read and write via undersized BSON buffer reservation in MongoDB C Driver
Summary
The BSON buffer-reservation API in the MongoDB C Driver can record a length smaller than the five-byte BSON minimum. Later append or comparison operations can underflow unsigned length calculations and read or write outside the document buffer. An actor who can influence the length supplied by an embedding application can cause the application to terminate or read or corrupt adjacent process memory. Reaching this issue requires the application to pass an undersized value to bson_reserve_buffer and then perform an affected operation.
Severity
6.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 19:20 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
1 reference
Impacted products
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CVE-2026-106429 (GCVE-0-2026-106429)
Vulnerability from cvelistv5 – Published: 2026-10-08 18:54 – Updated: 2026-10-08 19:30
VLAI
EPSS
VEX
Title
Application denial of service via malformed KMS endpoint in MongoDB libmongocrypt
Summary
An integer underflow in the KMS endpoint-parsing logic of MongoDB libmongocrypt can cause an allocation failure that terminates the application process. This can occur when an authenticated user modifies a key document in the key vault collection, or when an application accepts a KMS endpoint containing a colon after its path or query during key creation. The issue does not access memory outside its allocated bounds.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 19:29 UTC
CWE
- CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MongoDB | libmongocrypt |
Affected:
1.1.0 , < 1.20.5
(semver)
|
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CVE-2026-103636 (GCVE-0-2026-103636)
Vulnerability from cvelistv5 – Published: 2026-10-10 10:23 – Updated: 2026-10-10 12:10
VLAI
EPSS
VEX
Title
Apache DataSketches: datasketches-cpp: Out-of-bounds read in VarOpt union deserialization allows denial of service via a truncated sketch
Summary
Out-of-bounds read in the VarOpt union deserialization of Apache DataSketches C++ (repo: datasketches-cpp).
var_opt_union::deserialize() read the 32-byte preamble of a non-empty union after checking that only 8 bytes were available, so a truncated serialized union could cause a read of up to 24 bytes past the end of the input. For such inputs, the size remaining for the embedded sketch was also computed by an unsigned subtraction that could wrap around, so the embedded sketch's own size checks no longer limited reads to the input. The bytes read can become part of the deserialized union's state. This can cause a crash (denial of service) and could expose adjacent memory contents.
This issue affects Apache DataSketches C++: from 2.0.0-incubating before 5.3.0. Only applications that deserialize VarOpt unions from untrusted sources are affected.
Users are recommended to upgrade to version 5.3.0, which fixes this issue.
Severity
No CVSS data available.
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/znn94s463w7wy125k… | vendor-advisory |
| https://github.com/apache/datasketches-cpp/releas… | release-notes |
| http://www.openwall.com/lists/oss-security/2026/10/10/6 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache DataSketches |
Affected:
2.0.0-incubating , ≤ 5.2.0
(semver)
|
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.