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
6,161 results · Feed
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High 7.8
InDesign Desktop | Out-of-bounds Write (CWE-787)
InDesign Desktop versions ID20.1, ID19.5.2 and earlier are 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…
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High 7.8
InDesign Desktop | Out-of-bounds Write (CWE-787)
InDesign Desktop versions ID20.1, ID19.5.2 and earlier are 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…
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High 7.8
InDesign Desktop | Out-of-bounds Write (CWE-787)
InDesign Desktop versions ID20.1, ID19.5.2 and earlier are 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…
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High 7.8
Substance3D - Sampler | Out-of-bounds Write (CWE-787)
Substance3D - Sampler versions 4.5.2 and earlier are 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 …
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High 7.8
Substance3D - Sampler | Out-of-bounds Write (CWE-787)
Substance3D - Sampler versions 4.5.2 and earlier are 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 …
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High 7.8
Substance3D - Sampler | Out-of-bounds Write (CWE-787)
Substance3D - Sampler versions 4.5.2 and earlier are 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 …
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High 7.8
Substance3D - Sampler | Out-of-bounds Write (CWE-787)
Substance3D - Sampler versions 4.5.2 and earlier are 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 …
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High 7.8
Substance3D - Sampler | Out-of-bounds Write (CWE-787)
Substance3D - Sampler versions 4.5.2 and earlier are 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 …
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High 7.8
Substance3D - Painter | Out-of-bounds Write (CWE-787)
Substance3D - Painter versions 10.1.2 and earlier are 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…
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High 7.8
Substance3D - Painter | Out-of-bounds Write (CWE-787)
Substance3D - Painter versions 10.1.2 and earlier are 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…
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High 7.8
Substance3D - Designer | Out-of-bounds Write (CWE-787)
Substance3D - Designer versions 14.1 and earlier are 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 …
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High 8.1
An out of bounds write exists in FreeType versions 2.13.0 and below (newer versions of FreeType are not vulnerable) whe…
KEV May 6, 2025 -
High 7.8
A vulnerability has been identified in Teamcenter Visualization V14.3 (All versions < V14.3.0.13), Teamcenter Visualiza…
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Medium 6.5
IBM Common Cryptographic Architecture denial of service
IBM Common Cryptographic Architecture 7.0.0 through 7.5.51 could allow an authenticated user to cause a denial of service in the Hardware Security Module (HSM) using a specially crafted sequence of valid requests.
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Low 2.1
QTS, QuTS hero
An out-of-bounds write vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained administrator access to modify or corrupt memory. We have already fixed the v…
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Low 2.1
QTS, QuTS hero
An out-of-bounds write vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained administrator access to modify or corrupt memory. We have already fixed the v…
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Low 2.1
QTS, QuTS hero
An out-of-bounds write vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained administrator access to modify or corrupt memory. QTS 5.2.x/QuTS hero h5.2.x …
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High 7.5
Out-of-bounds Write in SixLabors ImageSharp
ImageSharp is a 2D graphics API. An Out-of-bounds Write vulnerability has been found in the ImageSharp gif decoder, allowing attackers to cause a crash using a specially crafted gif. This can potentially lead to denial of service. The problem has been patched…
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High 7.8
rtc: pcf85063: fix potential OOB write in PCF85063 NVMEM read
In the Linux kernel, the following vulnerability has been resolved: rtc: pcf85063: fix potential OOB write in PCF85063 NVMEM read The nvmem interface supports variable buffer sizes, while the regmap interface operates with fixed-size storage. If an nvmem clie…
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Medium 6.5
Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8
Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.…
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Low 3.8
Arkcompiler Ets Runtime has an out-of-bounds write vulnerability
in OpenHarmony v5.0.2 and prior versions allow a local attacker arbitrary code execution in pre-installed apps through out-of-bounds write. This vulnerability can be exploited only in restricted scenarios.
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Low 3.8
Arkcompiler Ets Runtime has an out-of-bounds write vulnerability
in OpenHarmony v5.0.2 and prior versions allow a local attacker arbitrary code execution in pre-installed apps through out-of-bounds write. This vulnerability can be exploited only in restricted scenarios.
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Low 3.8
Arkcompiler Ets Runtime has an out-of-bounds write vulnerability
in OpenHarmony v5.0.2 and prior versions allow a local attacker arbitrary code execution in pre-installed apps through out-of-bounds write. This vulnerability can be exploited only in restricted scenarios.
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Low 3.8
Arkcompiler Ets Runtime has an out-of-bounds write vulnerability
in OpenHarmony v5.0.2 and prior versions allow a local attacker arbitrary code execution in pre-installed apps through out-of-bounds write. This vulnerability can be exploited only in restricted scenarios.
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Medium 6.4
Grub2: romfs: integer overflow when handling symlinks may lead to heap based out-of-bounds write when reading dat
A flaw was found in grub2. When performing a symlink lookup from a romfs filesystem, grub's romfs filesystem module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer o…
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Medium 6.4
Grub2: jfs: integer overflow when handling symlinks may lead to heap based out-of-bounds write when reading data
A flaw was found in grub2. When reading data from a jfs filesystem, grub's jfs filesystem module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A malicio…
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Medium 6.4
Grub2: reiserfs: integer overflow when handling symlinks may lead to heap based out-of-bounds write when reading data
A flaw was found in grub2. When performing a symlink lookup from a reiserfs filesystem, grub's reiserfs fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer ove…
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High 7.8
Grub2: fs/hfs: strcpy() using the volume name (fs/hfs.c:382)
A flaw was found in the HFS filesystem. When reading an HFS volume's name at grub_fs_mount(), the HFS filesystem driver performs a strcpy() using the user-provided volume name as input without properly validating the volume name's length. This issue may read …
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Medium 6.7
Grub2: fs/tar: integer overflow causes heap oob write
A flaw was found in grub2. When reading tar files, grub2 allocates an internal buffer for the file name. However, it fails to properly verify the allocation against possible integer overflows. It's possible to cause the allocation length to overflow with a cr…
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High 7.8
Grub2: fs/hfs: integer overflow may lead to heap based out-of-bounds write
When reading data from a hfs filesystem, grub's hfs filesystem module uses user-controlled parameters from the filesystem metadata to calculate the internal buffers size, however it misses to properly check for integer overflows. A maliciouly crafted filesyst…
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Medium 6.8
In da, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of pr…
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Critical 9.8
In wlan AP FW, there is a possible out of bounds write due to improper input validation. This could lead to remote esca…
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High 7.8
In KeyInstall, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalati…
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Critical 10.0
Out-of-bounds Write in radare2
Out-of-bounds Write vulnerability in radareorg radare2 allows heap-based buffer over-read or buffer overflow.This issue affects radare2: before <5.9.9.
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High 7.8
mailbox: th1520: Fix memory corruption due to incorrect array size
In the Linux kernel, the following vulnerability has been resolved: mailbox: th1520: Fix memory corruption due to incorrect array size The functions th1520_mbox_suspend_noirq and th1520_mbox_resume_noirq are intended to save and restore the interrupt mask reg…
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Medium 5.3
Out-of-bounds vulnerability in slope processing during curve rendering in Generic PCL6 V4 Printer Driver / Generic UFR …
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Medium 5.3
Out-of-bounds vulnerability due to improper memory release during image rendering in Generic PCL6 V4 Printer Driver / G…
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High 7.8
cachefiles: Fix KASAN slab-out-of-bounds in cachefiles_set_volume_xattr
In the Linux kernel, the following vulnerability has been resolved: cachefiles: Fix KASAN slab-out-of-bounds in cachefiles_set_volume_xattr Use the actual length of volume coherency data when setting the xattr to avoid the following KASAN report. BUG: KASAN: …
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High 7.8
powerpc/kasan: Fix early region not updated correctly
In the Linux kernel, the following vulnerability has been resolved: powerpc/kasan: Fix early region not updated correctly The shadow's page table is not updated when PTE_RPN_SHIFT is 24 and PAGE_SHIFT is 12. It not only causes false positives but also false n…
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Medium 5.3
Out-of-bounds vulnerability in curve segmentation processing of Generic PCL6 V4 Printer Driver / Generic UFR II V4 Prin…