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CWE-122

3,113 CVEs • Abstraction: Variant • Likelihood of Exploit: High

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().

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CVEs (3,113)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Xmlsoft
1Libxml2
May 13, 2026
May 18, 2017
N/A· v4
7.5 HIGH· v3
5.0 MEDIUM· v2
libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictAddString function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerabilit...Show more
libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictAddString function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for CVE-2016-1839.Show less
1We Con
1Levi Studio Hmi Editor
May 13, 2026
Apr 27, 2017
N/A· v4
8.8 HIGH· v3
9.3 HIGH· v2
A Heap-Based Buffer Overflow issue was discovered in Wecon Technologies LEVI Studio HMI Editor before 1.8.1. This vulnerability causes a buffer overflow when a maliciously crafted project file is run by the system.
1Libtiff
1Libtiff
May 6, 2026
Jan 12, 2017
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
LibTIFF version 4.0.7 is vulnerable to a heap buffer overflow in the tools/tiffcp resulting in DoS or code execution via a crafted BitsPerSample value.
6Apple
CanonicalDebian+3 more
14Debian Linux
Enterprise Linux DesktopEnterprise Linux Server+11 more
May 6, 2026
May 20, 2016
N/A· v4
7.8 HIGH· v3
9.3 HIGH· v2
Heap-based buffer overflow in the xmlStrncat function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to execute arbit...Show more
Heap-based buffer overflow in the xmlStrncat function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted XML document.Show less
6Apple
CanonicalDebian+3 more
15Debian Linux
Enterprise Linux DesktopEnterprise Linux Server+12 more
May 6, 2026
Mar 24, 2016
N/A· v4
8.1 HIGH· v3
5.8 MEDIUM· v2
The xmlNextChar function in libxml2 before 2.9.4 allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted XML document.
5Adobe
HpOpensuse+2 more
15Enterprise Linux Desktop
Enterprise Linux EusEnterprise Linux Server+12 more
Apr 21, 2026
Jun 23, 2015
N/A· v4
9.8 CRITICAL· v3
10.0 HIGH· v2
Heap-based buffer overflow in Adobe Flash Player before 13.0.0.296 and 14.x through 18.x before 18.0.0.194 on Windows and OS X and before 11.2.202.468 on Linux allows remote attackers to execute arbitrary code via unspec...Show more
Heap-based buffer overflow in Adobe Flash Player before 13.0.0.296 and 14.x through 18.x before 18.0.0.194 on Windows and OS X and before 11.2.202.468 on Linux allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in June 2015.Show less
2Apple
Libpng
2Libpng
Mac Os X
May 6, 2026
Jan 10, 2015
N/A· v4
8.8 HIGH· v3
10.0 HIGH· v2
Heap-based buffer overflow in the png_combine_row function in libpng before 1.5.21 and 1.6.x before 1.6.16, when running on 64-bit systems, might allow context-dependent attackers to execute arbitrary code via a "very wi...Show more
Heap-based buffer overflow in the png_combine_row function in libpng before 1.5.21 and 1.6.x before 1.6.16, when running on 64-bit systems, might allow context-dependent attackers to execute arbitrary code via a "very wide interlaced" PNG image.Show less
1Libpng
1Libpng
May 6, 2026
May 6, 2014
N/A· v4
6.5 MEDIUM· v3
5.0 MEDIUM· v2
Multiple integer overflows in libpng before 1.5.14rc03 allow remote attackers to cause a denial of service (crash) via a crafted image to the (1) png_set_sPLT or (2) png_set_text_2 function, which triggers a heap-based b...Show more
Multiple integer overflows in libpng before 1.5.14rc03 allow remote attackers to cause a denial of service (crash) via a crafted image to the (1) png_set_sPLT or (2) png_set_text_2 function, which triggers a heap-based buffer overflow.Show less
1Libpng
1Libpng
May 6, 2026
May 6, 2014
N/A· v4
6.5 MEDIUM· v3
5.0 MEDIUM· v2
Integer overflow in the png_set_unknown_chunks function in libpng/pngset.c in libpng before 1.5.14beta08 allows context-dependent attackers to cause a denial of service (segmentation fault and crash) via a crafted image,...Show more
Integer overflow in the png_set_unknown_chunks function in libpng/pngset.c in libpng before 1.5.14beta08 allows context-dependent attackers to cause a denial of service (segmentation fault and crash) via a crafted image, which triggers a heap-based buffer overflow.Show less
1Schneider Electric
5Opc Factory Server Tlxcdlfofs
Opc Factory Server TlxcdltofsOpc Factory Server Tlxcdluofs+2 more
May 6, 2026
Apr 4, 2014
N/A· v4
N/A· v3
7.8 HIGH· v2
Multiple buffer overflows in the OPC Automation 2.0 Server Object ActiveX control in Schneider Electric OPC Factory Server (OFS) TLXCDSUOFS33 3.5 and earlier, TLXCDSTOFS33 3.5 and earlier, TLXCDLUOFS33 3.5 and earlier, T...Show more
Multiple buffer overflows in the OPC Automation 2.0 Server Object ActiveX control in Schneider Electric OPC Factory Server (OFS) TLXCDSUOFS33 3.5 and earlier, TLXCDSTOFS33 3.5 and earlier, TLXCDLUOFS33 3.5 and earlier, TLXCDLTOFS33 3.5 and earlier, and TLXCDLFOFS33 3.5 and earlier allow remote attackers to cause a denial of service via long arguments to unspecified functions.Show less
1Yokogawa
1Centum Cs 3000
May 6, 2026
Mar 14, 2014
N/A· v4
N/A· v3
9.3 HIGH· v2
Heap-based buffer overflow in BKCLogSvr.exe in Yokogawa CENTUM CS 3000 R3.09.50 and earlier allows remote attackers to execute arbitrary code via crafted UDP packets.
1Videolan
1Vlc Media Player
Apr 29, 2026
Jul 10, 2013
N/A· v4
6.3 MEDIUM· v3
6.8 MEDIUM· v2
plugins/demux/libmkv_plugin.dll in VideoLAN VLC Media Player 2.0.7, and possibly other versions, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted MKV file, po...Show more
plugins/demux/libmkv_plugin.dll in VideoLAN VLC Media Player 2.0.7, and possibly other versions, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted MKV file, possibly involving an integer overflow and out-of-bounds read or heap-based buffer overflow, or an uncaught exception. NOTE: the vendor disputes the severity and claimed vulnerability type of this issue, stating "This PoC crashes VLC, indeed, but does nothing more... this is not an integer overflow error, but an uncaught exception and I doubt that it is exploitable. This uncaught exception makes VLC abort, not execute random code, on my Linux 64bits machine." A PoC posted by the original researcher shows signs of an attacker-controlled out-of-bounds read, but the affected instruction does not involve a register that directly influences control flowShow less
1Adobe
3Acrobat
Acrobat ReaderReader
May 21, 2026
Oct 13, 2009
N/A· v4
8.8 HIGH· v3
9.3 HIGH· v2
Heap-based buffer overflow in Adobe Reader and Acrobat 7.x before 7.1.4, 8.x before 8.1.7, and 9.x before 9.2 allows remote attackers to execute arbitrary code via a crafted PDF file that triggers memory corruption, as e...Show more
Heap-based buffer overflow in Adobe Reader and Acrobat 7.x before 7.1.4, 8.x before 8.1.7, and 9.x before 9.2 allows remote attackers to execute arbitrary code via a crafted PDF file that triggers memory corruption, as exploited in the wild in October 2009. NOTE: some of these details are obtained from third party information.Show less