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
238 results · Clear filters · Feed
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High 8.8CVE-2026-32740 Public exploit
libheif: Heap-Buffer-Overflow Write in Grid Tile Chroma Compositing
libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap-buffer-overflow (write) vulnerability in the grid tile compositing, allowing an attacker to write 64 bytes of fully attacker-controlled data past the end of a…
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Medium 6.5CVE-2026-8388 Public exploit
Incorrect boundary conditions in the JavaScript Engine: JIT component
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.
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Medium 6.5CVE-2026-28956 Public exploit
A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 26.5 and iPadOS 26.5…
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High 7.8
rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to …
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Medium 5.1CVE-2026-40003 Public exploit
USB-based arbitrary memory write vulnerability in ZTE ZX297520V3 soc BootROM
ZTE ZX297520V3 BootROM contains a vulnerability that allows arbitrary memory writes via USB. Attackers can exploit the lack of target address validation in the USB download mode to write data to any location in BootROM runtime memory, thereby overwriting the …
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High 8.7
PAN-OS: Unauthenticated user initiated Buffer Overflow Vulnerability in User-ID™ Authentication Portal
A buffer overflow vulnerability in the User-ID™ Authentication Portal (aka Captive Portal) service of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls…
KEV May 6, 2026 -
High 8.8CVE-2026-7899 Public exploit
Out of bounds read and write in V8 in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to execute arbitra…
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High 7.7CVE-2026-36355 Public exploit
The rtl8192cd Wi-Fi kernel driver in the Realtek rtl819x Jungle SDK (all known versions through v3.4.14B) does not perf…
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High 8.7CVE-2026-33317 Public exploit
OP-TEE: PKCS#11 TA out-of-bounds read and memory disclosure
OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. In versions 3.13.0 through 4.10.0, missing checks in `entry_get_attribute_value()` in `ta/pkcs11/…
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High 8.6CVE-2026-40489 Public exploit
editorconfig-core-c has incomplete fix for CVE-2023-0341
editorconfig-core-c is an EditorConfig core library for use by plugins supporting EditorConfig parsing. Versions up to and including 0.12.10 have a stack-based buffer overflow in ec_glob() that allows an attacker to crash any application using libeditorconfig…
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Critical 9.8CVE-2026-31402 Public exploit
nfsd: fix heap overflow in NFSv4.0 LOCK replay cache
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache The NFSv4.0 replay cache uses a fixed 112-byte inline buffer (rp_ibuf[NFSD4_REPLAY_ISIZE]) to store encoded operation responses. This size…
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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 -
Medium 6.2CVE-2019-25485 Public exploit
R 3.4.4 Windows x64 Buffer Overflow SEH DEP ASLR Bypass
R 3.4.4 on Windows x64 contains a buffer overflow vulnerability in the GUI Preferences language menu field that allows local attackers to bypass DEP and ASLR protections. Attackers can inject a crafted payload through the Language for menus preference to trig…
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High 7.8CVE-2026-27280 Public exploit
DNG SDK | Out-of-bounds Write (CWE-787)
DNG SDK versions 1.7.1 2471 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 open a ma…
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High 8.4CVE-2026-0010 Public exploit
In onTransact of IDrmManagerService.cpp, there is a possible out of bounds write due to a missing bounds check. This co…
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Medium 6.5CVE-2026-20404 Public exploit
In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of servic…
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High 7.4CVE-2025-69419 Public exploit
Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion
Issue summary: Calling PKCS12_get_friendlyname() function on a maliciously crafted PKCS#12 file with a BMPString (UTF-16BE) friendly name containing non-ASCII BMP code point can trigger a one byte write before the allocated buffer. Impact summary: The out-of-…
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High 8.8
Stack buffer overflow in CMS (Auth)EnvelopedData parsing
Issue summary: Parsing CMS AuthEnvelopedData or EnvelopedData message with maliciously crafted AEAD parameters can trigger a stack buffer overflow. Impact summary: A stack buffer overflow may lead to a crash, causing Denial of Service, or potentially remote c…
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Medium 6.1CVE-2025-11187 Public exploit
Improper validation of PBMAC1 parameters in PKCS#12 MAC verification
Issue summary: PBMAC1 parameters in PKCS#12 files are missing validation which can trigger a stack-based buffer overflow, invalid pointer or NULL pointer dereference during MAC verification. Impact summary: The stack buffer overflow or NULL pointer dereferenc…
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Critical 9.3
WatchGuard Firebox iked Out of Bounds Write Vulnerability
An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked process may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when co…
KEV Dec 19, 2025 -
High 7.1CVE-2025-65018 Public exploit
LIBPNG is vulnerable to a heap buffer overflow in `png_combine_row` triggered via `png_image_finish_read`
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, there is a heap buffer overflow vulnerability in the libpng simplified API functio…
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High 7.5CVE-2024-56426 Public exploit
An issue was discovered in Samsung Mobile Processor and Wearable Processor Exynos 980, 990, 850, 1080, 2100, 1280, 2200…
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Critical 9.8CVE-2025-54957 Public exploit
An issue was discovered in Dolby UDC 4.5 through 4.13. A crash of the DD+ decoder process can occur when a malformed DD…
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Medium 6.3CVE-2025-43400 Public exploit
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.1 and iPadOS …
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Critical 9.3
WatchGuard Firebox iked Out of Bounds Write Vulnerability
An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked process may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when co…
KEV Nov 12, 2025 -
High 8.8
Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitr…
KEV Nov 10, 2025 -
Critical 9.3CVE-2010-20115 Public exploit
Vermillion FTP <= 1.31 Daemon PORT Command Memory Corruption
Arcane Software’s Vermillion FTP Daemon (vftpd) versions up to and including 1.31 contains a memory corruption vulnerability triggered by a malformed FTP PORT command. The flaw arises from an out-of-bounds array access during input parsing, allowing an attack…
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Critical 10.0
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS …
KEV Aug 21, 2025 -
Critical 10.0CVE-2025-34105 Public exploit
DiskBoss Enterprise Stack-Based Buffer Overflow RCE
A stack-based buffer overflow vulnerability exists in the built-in web interface of DiskBoss Enterprise versions 7.4.28, 7.5.12, and 8.2.14. The vulnerability arises from improper bounds checking on the path component of HTTP GET requests. By sending a specia…
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High 8.4CVE-2025-53367 Public exploit
DjVuLibre OOB-Write Vulnerability in MMRDecoder
DjVuLibre is a GPL implementation of DjVu, a web-centric format for distributing documents and images. Prior to version 3.5.29, the MMRDecoder::scanruns method is affected by an OOB-write vulnerability, because it does not check that the xr pointer stays with…
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High 7.5CVE-2025-5688 Public exploit
Out of Bounds Write in FreeRTOS-Plus-TCP
We have identified a buffer overflow issue allowing out-of-bounds write when processing LLMNR or mDNS queries with very long DNS names. This issue only affects systems using Buffer Allocation Scheme 1 with LLMNR or mDNS enabled. Users should upgrade to the la…
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High 8.8
Out of bounds read and write in V8 in Google Chrome prior to 137.0.7151.68 allowed a remote attacker to potentially exp…
KEV Jun 5, 2025 -
High 8.8CVE-2025-37947 Public exploit
ksmbd: prevent out-of-bounds stream writes by validating *pos
In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds stream writes by validating *pos ksmbd_vfs_stream_write() did not validate whether the write offset (*pos) was within the bounds of the existing stream data lengt…
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Medium 6.7CVE-2025-1122 Public exploit
Out-Of-Bounds Write in TPM2 Reference Library in Google ChromeOS 15753.50.0 stable on Cr50 Boards allows an attacker wi…
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High 7.1CVE-2025-24257 Public exploit
An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in iOS 18.4 and iPadOS 1…
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Critical 9.8CVE-2025-29384 Public exploit
In Tenda AC9 v1.0 V15.03.05.14_multi, the wanMTU parameter of /goform/AdvSetMacMtuWan has a stack overflow vulnerabilit…
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Critical 10.0
An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
KEV Mar 13, 2025 -
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 -
Medium 6.1CVE-2025-0690 Public exploit
Grub2: read: integer overflow may lead to out-of-bounds write
The read command is used to read the keyboard input from the user, while reads it keeps the input length in a 32-bit integer value which is further used to reallocate the line buffer to accept the next character. During this process, with a line big enough it…
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Critical 9.8CVE-2025-24118 Public exploit
The issue was addressed with improved memory handling. This issue is fixed in iPadOS 17.7.4, macOS Sequoia 15.3, macOS …