CWE-122— Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().— MITRE CWE catalog
4,117 active CVEs classified under this weakness category. Sourced from NVD, GHSA, and vendor advisories. Full definition on MITRE →
CVEs classified under CWE-122page 4 of 83
- CVE-2026-56159CRITICALCVSS 9.8EG 9.82026-07-14
Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-55010CRITICALCVSS 9.8EG 9.82026-07-14
Heap-based buffer overflow in Minecraft Bedrock Dedicated Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-50518CRITICALCVSS 9.8EG 9.82026-07-14
Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-50447CRITICALCVSS 9.8EG 9.82026-07-14
Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
- CVE-2026-50330CRITICALCVSS 9.8EG 9.82026-07-14
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to elevate privileges over a network.
- CVE-2026-49172CRITICALCVSS 9.8EG 9.82026-07-14
Heap-based buffer overflow in Windows FTP Service allows an unauthorized attacker to execute code over a network.
- CVE-2026-49164CRITICALCVSS 9.8EG 9.82026-07-14
Heap-based buffer overflow in Active Directory Domain Services allows an unauthorized attacker to execute code over a network.
- CVE-2026-42990CRITICALCVSS 9.8EG 9.82026-07-14
Heap-based buffer overflow in SQL Server ODBC driver allows an unauthorized attacker to execute code over a network.
- CVE-2026-57156CRITICALCVSS 9.8EG 9.82026-07-10
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit builds, FreeRDP clients contain an integer overflow in update_read_delta_points in libfreerdp/core/orders.c when multiplying an attacker-controlled …
- CVE-2026-47291CRITICALCVSS 9.8EG 9.82026-06-09
Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.
- CVE-2026-45657CRITICALCVSS 9.8EG 9.82026-06-09
Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.
- CVE-2026-49841CRITICALCVSS 9.8EG 9.82026-06-09
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, the mod_verto HTTP request hand…
- CVE-2026-8175CRITICALCVSS 9.8EG 9.82026-05-27
IBM Aspera High-Speed Transfer Endpoint 3.7.4 through 4.4.7 Fix Pack 1 and IBM Aspera High-Speed Transfer Server 3.7.4 through 4.4.7 Fix Pack 1 and IBM Aspera High-Speed Transfer Endpoint are affected by a buffer overflow in the asperahttp…
- CVE-2026-48689CRITICALCVSS 9.8EG 9.82026-05-26
FastNetMon Community Edition through 1.2.9 contains an off-by-one heap-based buffer overflow in the dynamic_binary_buffer_t class (src/dynamic_binary_buffer.hpp). Five methods (append_dynamic_buffer, append_data_as_pointer, append_data_as_…
- CVE-2026-48691CRITICALCVSS 9.8EG 9.82026-05-26
FastNetMon Community Edition through 1.2.9 contains an integer overflow in the BGP AS_PATH attribute encoder. In src/bgp_protocol.hpp, the IPv4UnicastAnnounce::get_attributes() function computes attribute_length as 'sizeof(bgp_as_path_segm…
- CVE-2026-8631CRITICALCVSS 9.8EG 9.82026-05-20
A potential security vulnerability has been identified in the HP Linux Imaging and Printing Software. This potential vulnerability may allow escalation of privileges and/or arbitrary code execution via an integer overflow in the hpcups pro…
- CVE-2026-8711CRITICALCVSS 9.8EG 9.82026-05-19
NGINX JavaScript has a vulnerability when the js_fetch_proxy directive is configured with at least one client-controlled NGINX variable (for example, $http_*, $arg_*, $cookie_*) and a location invoking the ngx.fetch() operation from NGINX…
- CVE-2026-47311CRITICALCVSS 9.8EG 9.82026-05-19
Heap-based buffer overflow vulnerability in Samsung Open Source Escargot allows Overflow Buffers. This issue affects Escargot: 590345cc6258317c5da850d846ce6baaf2afc2d3.
- CVE-2026-0264CRITICALCVSS 9.8EG 9.82026-05-13
A buffer overflow vulnerability in the DNS proxy and DNS Server features of Palo Alto Networks PAN-OS® Software allows an unauthenticated attacker with network access to cause a denial of service (DoS) condition (all PAN-OS platforms exce…
- CVE-2026-41096CRITICALCVSS 9.8EG 9.82026-05-12
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.
- CVE-2026-41509CRITICALCVSS 9.8EG 9.82026-05-08
CROSS implementation contains reference and optimized implementations of the CROSS post-quantum signature algorithm. Prior to commit fc6b7e7, there is a buffer overflow in crypto_sign_open() caused by an underflow of the integer mlen. This…
- CVE-2026-43186CRITICALCVSS 9.8EG 9.82026-05-06
In the Linux kernel, the following vulnerability has been resolved: ipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data() On the receive path, __ioam6_fill_trace_data() uses trace->nodelen to decide how much data to write for…
- CVE-2026-28780CRITICALCVSS 9.8EG 9.82026-05-05
Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server. If mod_proxy_ajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to mod_proxy_ajp and cause it to write 4 attacker co…
- CVE-2025-70067CRITICALCVSS 9.8EG 9.82026-05-04
Buffer Overflow vulnerability exists in Assimp versions up to 6.0.2 in the FBX Importer. The vulnerability occurs in aiMaterial::AddBinaryProperty, where a property key string from a crafted FBX file is copied into a fixed-size heap buffer…
- CVE-2026-42483CRITICALCVSS 9.8EG 9.82026-05-01
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects module_hash_decode in multipl…
- CVE-2026-5450CRITICALCVSS 9.8EG 9.82026-04-20
Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer over…
- CVE-2026-32956CRITICALCVSS 9.8EG 9.82026-04-20
SD-330AC and AMC Manager provided by silex technology, Inc. contain a heap-based buffer overflow vulnerability in processing the redirect URLs. Arbitrary code may be executed on the device.
- CVE-2026-40504CRITICALCVSS 9.8EG 9.82026-04-16
Creolabs Gravity before 0.9.6 contains a heap buffer overflow vulnerability in the gravity_vm_exec function that allows attackers to write out-of-bounds memory by crafting scripts with many string literals at global scope. Attackers can ex…
- CVE-2026-25205CRITICALCVSS 9.8EG 9.82026-04-13
Heap-based buffer overflow vulnerability in Samsung Open Source Escargot allows out-of-bounds write.This issue affects Escargot:commit hash 97e8115ab1110bc502b4b5e4a0c689a71520d335 .
- CVE-2026-5264CRITICALCVSS 9.8EG 9.82026-04-09
Heap buffer overflow in DTLS 1.3 ACK message processing. A remote attacker can send a crafted DTLS 1.3 ACK message that triggers a heap buffer overflow.
- CVE-2026-5187CRITICALCVSS 9.8EG 9.82026-04-09
Two potential heap out-of-bounds write locations existed in DecodeObjectId() in wolfcrypt/src/asn.c. First, a bounds check only validates one available slot before writing two OID arc values (out[0] and out[1]), enabling a 2-byte out-of-bo…
- CVE-2026-31402CRITICALCVSS 9.8EG 9.82026-04-03
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 operatio…
- CVE-2026-5244CRITICALCVSS 9.8EG 9.82026-04-02
A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mg_tls_recv_cert of the file mongoose.c of the component TLS 1.3 Handler. Such manipulation of the argument pubkey leads to heap-based buffer overflow…
- CVE-2026-32945CRITICALCVSS 9.8EG 9.82026-03-20
PJSIP is a free and open source multimedia communication library written in C. Versions 2.16 and below have a Heap-based Buffer Overflowvulnerability in the DNS parser's name length handler. Thisimpacts applications using PJSIP's built-in …
- CVE-2026-4395CRITICALCVSS 9.8EG 9.82026-03-19
Heap-based buffer overflow in the KCAPI ECC code path of wc_ecc_import_x963_ex() in wolfSSL wolfcrypt allows a remote attacker to write attacker-controlled data past the bounds of the pubkey_raw buffer via a crafted oversized EC public key…
- CVE-2026-3549CRITICALCVSS 9.8EG 9.82026-03-19
Heap Overflow in TLS 1.3 ECH parsing. An integer underflow existed in ECH extension parsing logic when calculating a buffer length, which resulted in writing beyond the bounds of an allocated buffer. Note that in wolfSSL, ECH is off by def…
- CVE-2026-3548CRITICALCVSS 9.8EG 9.82026-03-19
Two buffer overflow vulnerabilities existed in the wolfSSL CRL parser when parsing CRL numbers: a heap-based buffer overflow could occur when improperly storing the CRL number as a hexadecimal string, and a stack-based overflow for suffici…
- CVE-2006-10003CRITICALCVSS 9.8EG 9.82026-03-19
XML::Parser versions through 2.47 for Perl has an off-by-one heap buffer overflow in st_serial_stack. In the case (stackptr == stacksize - 1), the stack will NOT be expanded. Then the new value will be written at location (++stackptr), wh…
- CVE-2026-31806CRITICALCVSS 9.8EG 9.82026-03-13
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, the gdi_surface_bits() function processes SURFACE_BITS_COMMAND messages sent by the RDP server. When the command is handled using NSCodec, the bmp.width and…
- CVE-2026-31883CRITICALCVSS 9.8EG 9.82026-03-13
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, a size_t underflow in the IMA-ADPCM and MS-ADPCM audio decoders leads to heap-buffer-overflow write via the RDPSND audio channel. In libfreerdp/codec/dsp.c, …
- CVE-2026-22891CRITICALCVSS 9.8EG 9.82026-03-03
A heap-based buffer overflow vulnerability exists in the Intan CLP parsing functionality of The Biosig Project libbiosig 3.9.2 and Master Branch (db9a9a63). A specially crafted Intan CLP file can lead to arbitrary code execution. An attack…
- CVE-2026-0006CRITICALCVSS 9.8EG 9.82026-03-02
In multiple locations, there is a possible out of bounds read and write due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.
- CVE-2026-25897CRITICALCVSS 9.8EG 9.82026-02-24
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, an Integer Overflow vulnerability exists in the sun decoder. On 32-bit systems/builds, a carefully cra…
- CVE-2026-27168CRITICALCVSS 9.8EG 9.82026-02-21
SAIL is a cross-platform library for loading and saving images with support for animation, metadata, and ICC profiles. All versions are vulnerable to Heap-based Buffer Overflow through the XWD parser's use of the bytes_per_line value. The …
- CVE-2019-25327CRITICALCVSS 9.8EG 9.82026-02-12
Prime95 version 29.8 build 6 contains a buffer overflow vulnerability in the user ID input field that allows remote attackers to execute arbitrary code. Attackers can craft a malicious payload and paste it into the PrimeNet user ID and pro…
- CVE-2026-26011CRITICALCVSS 9.8EG 9.82026-02-12
navigation2 is a ROS 2 Navigation Framework and System. In 1.3.11 and earlier, a critical heap out-of-bounds write vulnerability exists in Nav2 AMCL's particle filter clustering logic. By publishing a single crafted geometry_msgs/PoseWithC…
- CVE-2020-37162CRITICALCVSS 9.8EG 9.82026-02-07
Wedding Slideshow Studio 1.36 contains a buffer overflow vulnerability in the registration key input that allows attackers to execute arbitrary code by overwriting memory. Attackers can craft a malicious payload of 1608 bytes to trigger a …
- CVE-2025-62799CRITICALCVSS 9.8EG 9.82026-02-03
Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group ). Prior to versions 3.4.1, 3.3.1, and 2.6.11, a heap buffer overflow exists in the Fast-DDS DATA_FRAG receive path. An un…
- CVE-2026-22778CRITICALCVSS 9.8EG 9.82026-02-02
vLLM is an inference and serving engine for large language models (LLMs). From 0.8.3 to before 0.14.1, when an invalid image is sent to vLLM's multimodal endpoint, PIL throws an error. vLLM returns this error to the client, leaking a heap …
- CVE-2026-24857CRITICALCVSS 9.8EG 9.82026-01-28
`bulk_extractor` is a digital forensics exploitation tool. Starting in version 1.4, `bulk_extractor`’s embedded unrar code has a heap‑buffer‑overflow in the RAR PPM LZ decoding path. A crafted RAR inside a disk image causes an out‑…
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