Weakness (CWE)
CWE-787: Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.
How to prevent it (7 mitigations)
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Requirements
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.
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Architecture and Design
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.
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Operation, Build and Compilation
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.
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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.
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Operation, Build and Compilation
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].
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Operation
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].
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Implementation
Replace unbounded copy functions with analogous functions that support length arguments, such as strcpy with strncpy. Create these if they are not available.
Source: MITRE CWE-787
3,640 results · Clear filters · Feed
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High 8.4
AIDA64 Extreme 5.99.4900 SEH Buffer Overflow via Logging
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High 7.8
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High 8.8
Out-of-bounds Write in MolotovCherry Android-ImageMagick7
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High 7.8
Out-of-bounds Write in WujekFoliarz DualSenseY-v2
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High 8.4
FTP Shell Server 6.83 Buffer Overflow via Account Name
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High 8.4
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High 7.8
Admin Express 1.2.5.485 Local SEH Buffer Overflow via Folder Path
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High 8.4
MiniFtp parseconf_load_setting Buffer Overflow via Configuration
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High 8.4
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High 8.4
Axessh 4.2 Local Stack-based Buffer Overflow via Log File Name
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High 8.4
DVDXPlayer Pro 5.5 Local Buffer Overflow with SEH
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High 8.4
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High 7.5
UltraJSON has an integer overflow handling large indent leads to buffer overflow or infinite loop
UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Versions 5.10 through 5.11.0 are vulnerable to buffer overflow or infinite loop through large indent handling. ujson.dumps() crashes the Python interpreter (segmenta…
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High 8.8
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High 8.8
Out of bounds write in V8 in Google Chrome prior to 146.0.7680.153 allowed a remote attacker to potentially exploit hea…
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High 8.8
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High 8.8
Out of bounds memory access in WebGL in Google Chrome on Android prior to 146.0.7680.153 allowed a remote attacker to p…
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High 8.1
skia-python vendors vulnerable libfreetype because of pinned cibuildwheel version
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High 7.2
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High 7.1
HTSlib CRAM decoder vulnerable to buffer overflow
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High 7.1
HTSlib BGZF index file reader has a heap buffer overflow
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High 7.1
HTSlib CRAM decoder has a heap buffer overflow
HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data using a variety of encodings and compression methods. When reading data encoded using the `BYTE_ARRAY_STOP` method, a…
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High 8.8
HTSlib CRAM decoder vulnerable to buffer overflow
HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data using a variety of encodings and compression methods. For the `VARINT` and `CONST` encodings, incomplete validation o…
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High 8.8
HTSlib CRAM reader has heap buffer overflow due to improper validation of input
HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. As one method of removing redundant data, CRAM uses reference-based compression so that instead of storing the full …
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High 8.8
HTSlib CRAM reader has heap buffer overflow due to improper validation of input
HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. While most alignment records store DNA sequence and quality values, the format also allows them to omit this data in…
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High 8.2
Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBTo…
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High 7.8
An out‑of‑bounds write vulnerability exists in the EMF functionality of Canva Affinity. By using a specially crafted EM…
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High 7.1
PX4 autopilot has a global buffer overflow in crsf_rc via oversized variable-length known packet
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High 8.8
GStreamer rtpqdm2depay Out-Of-Bounds Write Remote Code Execution Vulnerability
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High 7.8
GStreamer H.266 Codec Parser Out-Of-Bounds Write Remote Code Execution Vulnerability
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High 7.8
GStreamer DVB Subtitles Out-Of-Bounds Write Remote Code Execution Vulnerability
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High 7.8
GStreamer RealMedia Demuxer Out-Of-Bounds Write Remote Code Execution Vulnerability
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High 8.2
Integer Underflow in Lexbor ISO‑2022‑JP Encoder
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High 7.8
Out-Of-Bounds Write in Digilent DASYLab
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High 7.8
Out-Of-Bounds Write When Opening a Corrupt DSB File in Digilent DASYLab
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High 8.8
Out of bounds write in Skia in Google Chrome prior to 146.0.7680.75 allowed a remote attacker to perform out of bounds …
KEV Mar 13, 2026 -
High 8.8
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High 7.5
RIOT has an Out-of-Bounds Write in nanoCoAP Handler
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High 7.5
GetGo Download Manager 6.2.2.3300 Buffer Overflow DoS
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High 8.4
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