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
2,475 active CVEs classified under this weakness category. Sourced from NVD, GHSA, and vendor advisories. Full definition on MITRE →
CVEs classified under CWE-122page 44 of 50
- CVE-2026-3556HIGHCVSS 8.8EG 8.82026-03-16
Philips Hue Bridge HomeKit Pair-Setup Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Authentic…
- CVE-2026-3557HIGHCVSS 8.0EG 8.02026-03-16
Philips Hue Bridge hap_pair_verify_handler Sub-TLV Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips …
- CVE-2026-35590MEDIUMCVSS 6.8EG 6.82026-07-20
libvips is a fast image processing library with low memory needs. The EXIF decoder within libvips versions before and including 8.18.1 was not verifying the range of EXIF tag groups before passing data to libexif, leading to a possible nul…
- CVE-2026-35591HIGHCVSS 7.0EG 7.02026-07-20
libvips is a fast image processing library with low memory needs. The `tiffload` operation in libvips versions before and including 8.18.1 could incorrectly determine the number of channels in a JPEG or JPEG2000-encoded tile within a TIFF …
- CVE-2026-3560HIGHCVSS 8.8EG 8.82026-03-16
Philips Hue Bridge HomeKit hk_hap_pair_storage_put Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Brid…
- CVE-2026-3561HIGHCVSS 8.0EG 8.02026-03-16
Philips Hue Bridge hk_hap characteristics Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Altho…
- CVE-2026-38427HIGHCVSS 7.3EG 7.32026-05-27
An issue in fetch_jpg() in xdrv_10_scripter.ino in Tasmota through 15.3.0.3 allows a remote attacker to cause heap buffer overflow. The Content-Length from a JPEG stream is stored in a uint16_t variable; values above 65535 wrap around, cau…
- CVE-2026-3845HIGHCVSS 8.8EG 8.82026-03-10
Heap buffer overflow in the Audio/Video: Playback component in Firefox for Android. This vulnerability was fixed in Firefox 148.0.2.
- CVE-2026-38754HIGHCVSS 7.5EG 7.52026-07-15
A heap overflow in the ifsbreakup() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input.
- CVE-2026-38755HIGHCVSS 7.5EG 7.52026-07-15
A heap overflow in the evalcommand() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input.
- CVE-2026-39103MEDIUMCVSS 5.5EG 5.52026-05-05
Buffer Overflow vulnerability in GPAC before commit v391dc7f4d234988ea0bc3cc294eb725eddf8f702 allows an attacker to cause a denial of service via the src/scenegraph/svg_attributes.c, svg_parse_strings(), gf_svg_parse_attribute()
- CVE-2026-40033HIGHCVSS 8.8EG 8.82026-05-26
FreeRDP before 3.26.0 contains a heap-buffer-overflow vulnerability in gdi_CacheToSurface that allows remote attackers to write out-of-bounds heap memory. The vulnerability occurs because rectangle validation clamps coordinates to UINT16_M…
- CVE-2026-40106HIGHCVSS 7.8EG 7.82026-07-16
Wazuh is a free and open source platform used for threat prevention, detection, and response. Versions 4.6.0 and above prior to 4.14.5 contain a heap-based buffer overflow vulnerability in the syscheck component of the Wazuh agent for Wind…
- CVE-2026-40169MEDIUMCVSS 6.2EG 6.22026-04-13
ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below 7.1.2-19, a crafted image could result in an out of bounds heap write when writing a yaml or json output, resulting in a crash…
- CVE-2026-40183MEDIUMCVSS 5.5EG 5.52026-04-13
ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below 7.1.2-19, the JXL encoder has an heap write overflow when a user specifies that the image should be encoded as 16 bit floats. …
- CVE-2026-40310MEDIUMCVSS 5.5EG 5.52026-04-13
ImageMagick is free and open-source software used for editing and manipulating digital images. Versions below both 7.1.2-19 and 6.9.13-44, contain a heap out-of-bounds write in the JP2 encoder with when a user specifies an invalid sampling…
- CVE-2026-40362HIGHCVSS 7.8EG 7.82026-05-12
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-40363HIGHCVSS 8.4EG 8.42026-05-12
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
- CVE-2026-40364HIGHCVSS 8.4EG 8.42026-05-12
Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.
- CVE-2026-40377HIGHCVSS 7.8EG 7.82026-05-12
Heap-based buffer overflow in Windows Cryptographic Services allows an authorized attacker to elevate privileges locally.
- CVE-2026-40380MEDIUMCVSS 6.2EG 6.22026-05-12
Heap-based buffer overflow in Volume Manager Extension Driver allows an authorized attacker to execute code with a physical attack.
- CVE-2026-40398HIGHCVSS 7.8EG 7.82026-05-12
Heap-based buffer overflow in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.
- CVE-2026-40403HIGHCVSS 8.8EG 8.82026-05-12
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally.
- CVE-2026-40404HIGHCVSS 7.8EG 7.82026-06-09
Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
- CVE-2026-40407HIGHCVSS 7.8EG 7.82026-05-12
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
- 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-2026-40528HIGHCVSS 7.8EG 7.82026-05-29
OpenSC before 0.27.0, fixed in commit 0358817, contains a stack and heap buffer overrun vulnerability in the do_key_value() function in src/pkcs15init/profile.c that allows attackers to corrupt memory by supplying a crafted profile configu…
- CVE-2026-40614HIGHCVSS 8.8EG 8.82026-04-21
PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is a buffer overflow when decoding Opus audio frames due to insufficient buffer size validation in the Opus codec decode path. The FE…
- CVE-2026-40691HIGHCVSS 7.5EG 7.52026-07-22
In Unbound 1.9.0 up to and including 1.25.1, when a DNSCrypt query is received over TCP, the routine that encrypts the reply in place fails to bound the reply length against the destination buffer size. The size clamp that protects the UDP…
- CVE-2026-40706HIGHCVSS 8.4EG 8.42026-04-21
In NTFS-3G 2022.10.3 before 2026.2.25, a heap buffer overflow exists in ntfs_build_permissions_posix() in acls.c that allows an attacker to corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflo…
- 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-2026-41108HIGHCVSS 7.0EG 7.02026-06-09
Heap-based buffer overflow in Microsoft Windows DNS allows an authorized attacker to elevate privileges locally.
- CVE-2026-41252CRITICALCVSS 9.8EG 9.82026-07-20
xrdp is an open source RDP server. Versions 0.10.6 and prior contain a missing bounds check in xrdp, which allows a heap-based buffer overflow when operating in vnc-any mode. The issue occurs during the handling of RFB protocol color map m…
- CVE-2026-41445HIGHCVSS 8.8EG 8.82026-04-20
KissFFT before commit 8a8e66e contains an integer overflow vulnerability in the kiss_fftndr_alloc() function in kiss_fftndr.c where the allocation size calculation dimOther*(dimReal+2)*sizeof(kiss_fft_scalar) overflows signed 32-bit integ…
- 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-2026-4152HIGHCVSS 7.8EG 7.82026-04-11
GIMP JP2 File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vuln…
- CVE-2026-4153HIGHCVSS 7.8EG 7.82026-04-11
GIMP PSP File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vuln…
- CVE-2026-4177CRITICALCVSS 9.1EG 9.12026-03-17
YAML::Syck versions through 1.36 for Perl has several potential security vulnerabilities including a high-severity heap buffer overflow in the YAML emitter. The heap overflow occurs when class names exceed the initial 512-byte allocation.…
- CVE-2026-41981MEDIUMCVSS 5.3EG 5.32026-06-09
Out-of-bounds write vulnerability in the IPC module. Impact: Successful exploitation of this vulnerability may affect availability.
- CVE-2026-42046HIGHCVSS 7.8EG 7.82026-05-11
libcaca is a colour ASCII art library. In 0.99.beta20 and earlier, an integer overflow vulnerability in libcaca's canvas import functionality allows an attacker to cause a controlled heap out-of-bounds write (heap overflow) by supplying a …
- CVE-2026-42055HIGHCVSS 8.1EG 8.12026-06-17
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_proxy_v2_module and ngx_http_grpc_module modules. This vulnerability exists when the proxy_http_version to 2 or grpc_pass directives are used to proxy HTTP/2 traffic…
- CVE-2026-42309MEDIUMCVSS 5.5EG 5.52026-05-09
Pillow is a Python imaging library. From version 11.2.1 to before version 12.2.0, passing nested lists as coordinates to APIs that accept coordinates such as ImagePath.Path, ImageDraw.ImageDraw.polygon and ImageDraw.ImageDraw.line could ca…
- CVE-2026-42477HIGHCVSS 7.1EG 7.12026-05-01
A heap-based out-of-bounds read vulnerability in RWObj_Reader::read in the OBJ file parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 allows user-assisted attackers to cause a denial of service or obtain sensitive information by persuadi…
- 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-2026-42512HIGHCVSS 8.1EG 8.12026-04-30
As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer…
- CVE-2026-42533HIGHCVSS 8.1EG 8.12026-07-15
A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and a string expression references the map's regex capture variables before referencing the map output variable. Alternatively, the same r…
- CVE-2026-42536HIGHCVSS 7.5EG 7.52026-06-08
Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68,…
- CVE-2026-42831HIGHCVSS 7.8EG 7.82026-05-12
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
- CVE-2026-42896HIGHCVSS 7.8EG 7.82026-05-12
Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
- CVE-2026-42904CRITICALCVSS 9.6EG 9.62026-06-09
Heap-based buffer overflow in Windows TCP/IP allows an unauthorized attacker to elevate privileges over an adjacent network.
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