Common Weakness Enumeration
CWE-787
Allowed-with-ReviewOut-of-bounds Write
Abstraction: Base · Status: Draft
The product writes data past the end, or before the beginning, of the intended buffer.
15627 vulnerabilities reference this CWE, most recent first.
CVE-2026-73193 (GCVE-0-2026-73193)
Vulnerability from cvelistv5 – Published: 2026-08-15 12:09 – Updated: 2026-08-17 20:31
VLAI
EPSS
VEX
Title
DBI versions before 1.652 for Perl allow a heap out-of-bounds write on 32-bit perl via an integer wraparound in the output buffer size computed by preparse
Summary
DBI versions before 1.652 for Perl allow a heap out-of-bounds write on 32-bit perl via an integer wraparound in the output buffer size computed by preparse.
preparse reserves its output buffer with `newSV(strlen(statement) * 7 + 16)`, budgeting seven output bytes per input byte for the longest ':p99999' expansion. The product is computed in STRLEN, which is 32 bits wide on a 32-bit perl build, so a statement of 613,566,757 bytes multiplies to 4,294,967,299, wraps modulo 2^32 to 3, and reserves 19 bytes. The parser then copies the statement out through a raw pointer with no capacity check, writing the whole 585 MB input past the end of the allocation. The 99,999 placeholder limit does not bound this path, which is reached by ordinary non-placeholder content.
Any caller that passes an untrusted statement of that length to preparse on a 32-bit perl gets a heap out-of-bounds write of attacker controlled bytes. Builds with a 64-bit STRLEN are not affected, since the wrap there needs a statement of about 2.3 exabytes.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 20:30 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.cve.org/CVERecord?id=CVE-2026-14739 | related |
| https://github.com/perl5-dbi/dbi/security/advisor… | vendor-advisory |
| https://github.com/perl5-dbi/dbi/commit/c751ae5a5… | patch |
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CVE-2026-73072 (GCVE-0-2026-73072)
Vulnerability from cvelistv5 – Published: 2026-08-11 15:31 – Updated: 2026-08-13 15:17
VLAI
EPSS
VEX
Title
Vim: Heap Buffer Overflow when Loading a Spell File
Summary
Vim is an open source, command line text editor. Prior to 9.2.0846, set_sofo() in src/spellfile.c reuses sl_sal_first[] without resetting values left by set_sal_first(), so a crafted spell file containing an SN_SAL section before an SN_SOFO section causes under-counted mapping lists and attacker-influenced writes beyond a heap allocation. This issue is fixed in version 9.2.0846.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 15:17 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/vim/vim/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/vim/vim/commit/05c41c922309c7a… | x_refsource_MISC |
| https://github.com/vim/vim/releases/tag/v9.2.0846 | x_refsource_MISC |
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CVE-2026-73066 (GCVE-0-2026-73066)
Vulnerability from cvelistv5 – Published: 2026-08-11 14:49 – Updated: 2026-08-11 15:36
VLAI
EPSS
VEX
Title
Tesseract: Heap out-of-bounds write in LSTM Convolve layer via crafted .traineddata
Summary
Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata LSTM model component loaded through Tesseract's deserializer can cause an unchecked signed integer multiplication in Convolve::DeSerialize in src/lstm/convolve.cpp to wrap the convolution output-channel count, undersizing the forward-pass output buffer while writes use the unwrapped element count and causing a heap out-of-bounds write during OCR recognition. This issue is fixed in version 5.5.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 15:31 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tesseract-ocr/tesseract/securi… | x_refsource_CONFIRM |
| https://github.com/tesseract-ocr/tesseract/pull/4588 | x_refsource_MISC |
| https://github.com/tesseract-ocr/tesseract/commit… | x_refsource_MISC |
| https://github.com/tesseract-ocr/tesseract/releas… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tesseract-ocr | tesseract |
Affected:
< 5.5.3
|
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CVE-2026-72854 (GCVE-0-2026-72854)
Vulnerability from cvelistv5 – Published: 2026-08-20 18:19 – Updated: 2026-08-20 18:53
VLAI
EPSS
VEX
Title
msgpack-c Integer Overflow in msgpack_unpacker_expand_buffer Causes a False-Success Undersized Reservation
Summary
msgpack_unpacker_expand_buffer in src/unpack.c, reached through the public msgpack_unpacker_reserve_buffer API, computes its new buffer size using an unchecked size_t addition of the requested size and the amount already used. The doubling loop guards its own multiplication against overflow, but the addition in the loop condition is unguarded, so a request near SIZE_MAX wraps: the loop condition is already satisfied, the allocation is performed at the small pre-wrap size, and the function returns true. The caller is told the requested capacity was reserved when it was not, so a subsequent write of the requested length overflows the heap buffer. The library's own example/lib_buffer_unpack.c demonstrates the reserve-then-write pattern, and its defensive assert comparing capacity against the request is compiled out under NDEBUG. msgpack-c's own decode entry points do not derive the reservation size from untrusted input, so reaching this requires an integration that passes an attacker-influenced length to the reservation API, such as a length-prefixed streaming transport.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 18:52 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/msgpack/msgpack-c/issues/1181 | issue-tracking |
| https://github.com/msgpack/msgpack-c/blob/c-7.0.1… | technical-description |
| https://github.com/msgpack/msgpack-c/blob/c-7.0.1… | technical-description |
| https://github.com/msgpack/msgpack-c/blob/c-7.0.1… | technical-description |
| https://github.com/msgpack/msgpack-c | product |
| https://www.vulncheck.com/advisories/msgpack-c-in… | third-party-advisory |
Date Public
2026-08-13 00:00
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CVE-2026-72852 (GCVE-0-2026-72852)
Vulnerability from cvelistv5 – Published: 2026-08-20 18:19 – Updated: 2026-08-25 15:18
VLAI
EPSS
VEX
Title
darknet Integer Overflow in Convolutional Layer Buffer Sizing Leads to Heap Buffer Overflow
Summary
hank-ai/darknet sizes a convolutional layer's weight and output heap buffers by multiplying configuration fields taken from a .cfg file in unchecked 32-bit int arithmetic. In src-lib/convolutional_layer.cpp, l.nweights is computed as (c / groups) * n * size * size and l.outputs as l.out_h * l.out_w * l.out_c, and both feed xcalloc directly. A .cfg whose true dimension product exceeds INT_MAX wraps to a small or zero value, so the allocation is undersized; for example width and height of 256 with filters of 65536 gives 2^32, which wraps to 0. forward_convolutional_layer then re-derives the GEMM dimensions with a different operand order, computing k as l.size*l.size*l.c / l.groups where the allocation divided before multiplying, and reads and writes through the undersized buffer. Loading the crafted .cfg for inference or training is sufficient and no valid .weights file is required. The reported proof of concept observed a heap buffer overflow read in gemm_nn_fast under AddressSanitizer and glibc allocator metadata corruption in a release build of the same input, indicating an out-of-bounds write.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:17 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/hank-ai/darknet/issues/148 | issue-tracking |
| https://github.com/hank-ai/darknet/blob/v6.0/src-… | technical-description |
| https://github.com/hank-ai/darknet/blob/v6.0/src-… | technical-description |
| https://github.com/hank-ai/darknet/blob/v6.0/src-… | technical-description |
| https://github.com/hank-ai/darknet | product |
| https://www.vulncheck.com/advisories/darknet-inte… | third-party-advisory |
Date Public
2026-08-13 00:00
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CVE-2026-71969 (GCVE-0-2026-71969)
Vulnerability from cvelistv5 – Published: 2026-08-10 18:18 – Updated: 2026-08-17 19:00 X_Open Source
VLAI
EPSS
VEX
Title
OP-TEE OS 4.10.0 Buffer Underwrite via RSA NOPAD Encrypt/Decrypt Operations
Summary
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Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 19:47 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://blog.secmate.dev/posts/optee-vulnerabilit… | technical-descriptionexploit |
| https://github.com/OP-TEE/optee_os/pull/7898 | issue-tracking |
| https://github.com/OP-TEE/optee_os/pull/7808 | issue-tracking |
| https://github.com/OP-TEE/optee_os/commit/7b8b494… | patch |
| https://www.vulncheck.com/advisories/op-tee-os-bu… | third-party-advisory |
Impacted products
Date Public
2026-07-30 00:00
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CVE-2026-71564 (GCVE-0-2026-71564)
Vulnerability from cvelistv5 – Published: 2026-08-25 17:42 – Updated: 2026-08-27 22:32
VLAI
EPSS
VEX
Title
Substance3D - Designer | Out-of-bounds Write (CWE-787)
Summary
Substance3D - Designer is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 03:56 UTC
CWE
- CWE-787 - Out-of-bounds Write (CWE-787)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/substan… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Substance 3D Designer |
Affected:
0 , ≤ 16.0.4
(semver)
Unaffected: 16.0.5 (semver) |
Date Public
2026-08-25 17:00
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CVE-2026-71382 (GCVE-0-2026-71382)
Vulnerability from cvelistv5 – Published: 2026-08-25 17:45 – Updated: 2026-08-27 22:32
VLAI
EPSS
VEX
Title
Substance3D - Sampler | Out-of-bounds Write (CWE-787)
Summary
Substance3D - Sampler is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 00:00 UTC
CWE
- CWE-787 - Out-of-bounds Write (CWE-787)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/substan… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Substance 3D Sampler |
Affected:
0 , ≤ 6.0.1
(semver)
Unaffected: 6.0.3 (semver) |
Date Public
2026-08-25 17:00
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CVE-2026-71263 (GCVE-0-2026-71263)
Vulnerability from cvelistv5 – Published: 2026-08-05 12:26 – Updated: 2026-08-10 11:46
VLAI
EPSS
VEX
Title
FreeModbus LINUXTCP Port Off-by-One Global Buffer Overflow in xMBPortTCPPool()
Summary
The LINUXTCP port of FreeModbus contains an off-by-one bounds check in xMBPortTCPPool (demo/LINUXTCP/port/porttcp.c). The check uses a strict greater-than comparison instead of greater-than-or-equal against the 263-byte MB_TCP_BUF_SIZE limit.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 15:39 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cwalter-at/freemodbus | third-party-advisory |
| https://github.com/cwalter-at/freemodbus/blob/mas… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| cwalter-at | FreeModbus |
Affected:
0 , ≤ *
(custom)
|
Date Public
2026-08-05 12:26
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CVE-2026-71255 (GCVE-0-2026-71255)
Vulnerability from cvelistv5 – Published: 2026-08-05 11:44 – Updated: 2026-08-10 11:46
VLAI
EPSS
VEX
Title
nanoMODBUS Client-Side Out-of-Bounds Write via object_length in recv_read_device_identification_res()
Summary
nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus client-side recv_read_device_identification_res function (FC 0x2B/MEI 0x0E, Read Device Identification) in nanomodbus.c. The server-supplied object_length field (0-246) is validated only against the remaining PDU size (res_size_left) and is never validated against the caller-supplied buffers_length parameter.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 12:28 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/debevv/nanoMODBUS | third-party-advisory |
| https://github.com/debevv/nanoMODBUS/blob/master/… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| debevv | nanoMODBUS |
Affected:
0 , ≤ 1.23.0
(semver)
|
Date Public
2026-08-05 11:44
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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, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer.
- Be wary that a language's interface to native code may still be subject to overflows, even if the language itself is theoretically safe.
Mitigation MIT-4.1
Architecture and Design
Strategy: Libraries or Frameworks
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- Examples include the Safe C String Library (SafeStr) by Messier and Viega [REF-57], and the Strsafe.h library from Microsoft [REF-56]. These libraries provide safer versions of overflow-prone string-handling functions.
Mitigation MIT-10
Operation
Build and Compilation
Strategy: Environment Hardening
- Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
- D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
Mitigation MIT-9
Implementation
- Consider adhering to the following rules when allocating and managing an application's memory:
- Double check that the buffer is as large as specified.
- When using functions that accept a number of bytes to copy, such as strncpy(), be aware that if the destination buffer size is equal to the source buffer size, it may not NULL-terminate the string.
- Check buffer boundaries if accessing the buffer in a loop and make sure there is no danger of writing past the allocated space.
- If necessary, truncate all input strings to a reasonable length before passing them to the copy and concatenation functions.
Mitigation MIT-11
Operation
Build and Compilation
Strategy: Environment Hardening
- Run or compile the software using features or extensions that randomly arrange the positions of a program's executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
- Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as "rebasing" (for Windows) and "prelinking" (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
- For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].
Mitigation MIT-12
Operation
Strategy: Environment Hardening
- Use a CPU and operating system that offers Data Execution Protection (using hardware NX or XD bits) or the equivalent techniques that simulate this feature in software, such as PaX [REF-60] [REF-61]. These techniques ensure that any instruction executed is exclusively at a memory address that is part of the code segment.
- For more information on these techniques see D3-PSEP (Process Segment Execution Prevention) from D3FEND [REF-1336].
Mitigation MIT-13
Implementation
Replace unbounded copy functions with analogous functions that support length arguments, such as strcpy with strncpy. Create these if they are not available.
No CAPEC attack patterns related to this CWE.