Weakness (CWE)
CWE-125: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How to prevent it (2 mitigations)
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Implementation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
To reduce the likelihood of introducing an out-of-bounds read, ensure that you validate and ensure correct calculations for any length argument, buffer size calculation, or offset. Be especially careful of relying on a sentinel (i.e. special character such as NUL) in untrusted inputs.
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Architecture and Design
Use a language that provides appropriate memory abstractions.
Source: MITRE CWE-125
2,826 results · Clear filters · Feed
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Medium 5.3
In Modem, there is a possible out of bounds read due to a missing bounds check. This could lead to remote denial of ser…
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Medium 5.3
In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote denial of se…
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Medium 5.3
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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Medium 5.3
In Modem, there is a possible out of bounds read due to a missing bounds check. This could lead to remote denial of ser…
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Medium 6.9
Tesseract: Double free and use after free in the PAGE XML renderer on right-to-left pages
Tesseract is an open source OCR engine. From 5.4.0 until 5.5.4, AppendLinePolygon in src/api/pagerenderer.cpp destroys the caller-owned right-to-left Pta accumulator while receiving it by value, leaving line_top_rtl_pts and line_bottom_rtl_pts dangling. On an…
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Medium 5.9
gopacket: SCTP chunk sub-decoder out-of-bounds panics on crafted segments
gopacket provides packet processing capabilities for Go. Prior to 1.7.2, the SCTP chunk chain in layers/sctp.go passes attacker-controlled declared lengths and counts to decodeSCTPInit, decodeSCTPShutdown, decodeSCTPError, decodeSCTPSack, and decodeSCTPParame…
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Medium 6.1
Blender before 4.5.15 and 5.x before 5.2.3 Out-of-Bounds Read via blo_bhead_id Accessors
Blender before 4.5.15 and 5.x before 5.2.3 contains an out-of-bounds read vulnerability in blo_bhead_id_* accessors in readfile.cc that read ID fields without block length checks. Attackers can supply a crafted .blend file with short ID blocks that, when brow…
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Medium 5.5
Blender before 4.5.15 and 5.x before 5.2.3 Out-of-Bounds Read via GLOB Block
Blender before 4.5.15 and 5.x before 5.2.3 contains a heap out-of-bounds read vulnerability in read_file_dna() that reads a GLOB block field without validating its declared length. Attackers can supply a crafted .blend file with a truncated GLOB block that, w…
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Medium 6.1
Scribus before 1.6.7 and 1.7.x before 1.7.4 Out-of-Bounds Read via PICT Planar Image Data
Scribus before 1.6.7 and 1.7.x before 1.7.4 contains an out-of-bounds read vulnerability in the Mac PICT image loader and import plugin when decoding planar pixel data. Attackers can supply a crafted PICT file with manipulated dimensions that, when placed or …
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Medium 5.9
MariaDB Connector/J: Rogue server can make the client read past the packet through server-declared lengths
MariaDB Connector/J is used to connect applications developed in Java to MariaDB and MySQL databases. From 3.0.0 until 3.3.7, 3.4.5, and 3.5.11, decoders for OK packet session-state blocks, column definition packets, text row data, or binary row data used ser…
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Medium 5.3
Out-of-bounds read of DCP block header in DCP Set and Identify request parsing
P-Net before 1.0.3 does not check that a complete block header is present in the received data before reading the next block in DCP Set and Identify requests. If the last block ends at the end of the receive buffer, the block length of the following block is …
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Medium 4.3
Dnsmasq: dnsmasq: heap out-of-bounds read in dhcpv6 option 39 fqdn decoder
A flaw was found in dnsmasq. The DHCPv6 client hostname parser can read one byte past the end of a crafted FQDN option because it checks the next label length before confirming the pointer is still inside the option. An attacker on the local network can trigg…
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Medium 5.3
lwIP 2.0.0 through 2.2.1 SNMP Agent Out-of-Bounds Read via snmp_pbuf_stream_writeto()
lwIP 2.0.0 through 2.2.1 built with the SNMP agent contains an out-of-bounds read vulnerability in snmp_pbuf_stream_writeto() that bounds copies by pbuf->len instead of remaining bytes. Remote unauthenticated attackers knowing the read community can send frag…
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Medium 4.3
Session Smart Router: An attacker can cause an out-of-bounds read during VRRP packet processing
An Out-of-Bounds Read vulnerability in the VRRP implementation in Juniper Networks Session Smart Router allows an L2-adjacent attacker to read stale memory contents or cause a system fault via a specially crafted VRRPv3 advertisement.
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Medium 5.3
Session Smart Router and Session Smart Conductor: A malformed HTTP URI causes a service crash during HTTP application identification
An Out-of-Bounds Read vulnerability in the HttpParser component in Juniper Networks Session Smart Router and Session Smart Conductor allows an attacker to cause a denial of service via a specially crafted HTTP request.
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Medium 4.3
ThorVG: Out-of-bounds Read in SFNT/TTF Font Loader via Memory API
Thor Vector Graphics (ThorVG) is a production-ready vector graphics engine. Prior to 1.0.7, the `SFNT/TTF` font loader's `SfntLoader::gen` function in `tvgSfntLoader.cpp` reads `data[0] through data[3]` to identify the font type without first checking that th…
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Medium 6.0
Asterisk: Out-of-Bounds Write in Codec2 Decoder Due to Floor/Ceil Sample Count Mismatch
Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an authenticated attacker may cause a heap buffer overflow through an out-of-bounds w…
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Medium 5.5
Substance3D - Painter | Out-of-bounds Read (CWE-125)
Substance3D - Painter is affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue requires user interaction i…
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Medium 6.1
SDL_image through 3.4.8 and 2.8.12 Stack Out-of-Bounds Read in ILBM Loader
SDL_image through 3.4.8 and through 2.8.12 contains a stack out-of-bounds read vulnerability in IMG_LoadLBM_IO() in src/IMG_lbm.c that skips bitplane count validation when HAM mode is set. Attackers can supply a crafted ILBM file with more than 8 HAM bitplane…
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Medium 4.3
zchunk before 1.5.5 Heap Out-of-Bounds Read via read_preface()
zchunk before 1.5.5 contains a heap out-of-bounds read vulnerability in read_preface() in src/lib/header.c that passes the total header length instead of remaining bytes to compint parsing functions. Attackers can supply a crafted .zck file whose header ends …
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Medium 4.3
Out-of-bounds read vulnerability in QTextCodec TSCII encoding impacts Qt
An out-of-bounds read vulnerability in the QTextCodec TSCII encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Applications that convert text to the TSCII encoding through QTextCodec may read memory outside the input buff…
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Medium 5.3
Out-of-bounds read vulnerability in NTLM authentication handling impacts Qt
Out-of-bounds read in the QAuthenticator NTLM authentication handling in the Qt Network module in Qt Group Qt allows remote attackers to obtain sensitive information (heap memory contents) or cause a denial of service (application crash) via a crafted NTLM ch…
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Medium 5.5
DevilutionX 1.4.0 through 1.5.5 Out-of-Bounds Read via libmpq Hash Table Lookup
DevilutionX 1.4.0 through 1.5.5 contains an out-of-bounds read vulnerability in the bundled libmpq libmpq__file_number_from_hash function that allows attackers to read heap memory via unchecked block_table_index values. Attackers can place a crafted .mpq arch…
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Medium 5.5
llama.cpp before b5649 Heap Out-of-Bounds Read via llama_vocab::impl::print_info
llama.cpp before b5649 contains a heap out-of-bounds read vulnerability in llama_vocab::impl::print_info() that allows attackers to crash model loading via oversized special token IDs. Attackers can supply a crafted GGUF model with a short tokenizer.ggml.toke…
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Medium 6.1
llama.cpp before b2731 Out-of-Bounds Read via GGUF Tensor Offsets
llama.cpp before b2731 contains an out-of-bounds read vulnerability in llama_model_loader that allows attackers to read memory outside the mapped model file via crafted GGUF tensor offsets. Attackers can supply a crafted or truncated GGUF model file with arbi…
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Medium 5.3
ntop nDPI through 6.0 Out-of-Bounds Read in SoftEther Dissector
ntop nDPI through 6.0 contains an out-of-bounds read vulnerability in dissect_softether_host_fqdn() in softether.c that compares host_name using the consumed byte count instead of data length. Remote attackers can send crafted short UDP datagrams on already-c…
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Medium 6.1
libpff through 20260926 Heap Out-of-Bounds Read via libpff_table_read_values_array
Libpff through 20260926 contains a heap out-of-bounds read vulnerability in libpff_table_read_values_array because a 7c column definition's values_array_size is not checked against remaining buffer bytes. Attackers can supply a crafted PST, OST or PAB file to…
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Medium 4.4
libdwarf through 2.3.3 Heap Out-of-Bounds Read via dwarf_debug_addr_table
libdwarf through 2.3.3 contains a heap out-of-bounds read vulnerability in dwarf_debug_addr_table() that omits the table starting offset when validating .debug_addr unit length. Attackers can supply a crafted object file with a non-zero offset table, causing …
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Medium 5.5
Furnace through 0.6.8.3 Out-of-Bounds Read via FamiTracker Module Import
Furnace through 0.6.8.3 contains an out-of-bounds heap read vulnerability in DivEngine::loadFTM() in src/engine/fileOps/ftm.cpp, triggered by an unbounded DPCM note count during FamiTracker module import. Attackers can craft a .ftm, .dnm or 0CC/E-FamiTracker …
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Medium 5.5
libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x0024
libfvde through 20260923 contains a heap out-of-bounds read vulnerability in libfvde_encrypted_metadata_read_type_0x0024() because xml_plist_data_size is not checked against the source metadata block. Attackers can supply a crafted FileVault 2 Core Storage vo…
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Medium 5.5
gbsplay through 0.0.103 Out-of-Bounds Read via mapper_map ROM Bank Index
gbsplay through 0.0.103 contains an out-of-bounds read vulnerability in mapper_map() in mapper.c that fails to reject ROM bank indexes beyond the ROM size, causing an underflowed bank length. Attackers can supply crafted .gbr, .gbs or .gb files with malicious…
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Medium 5.5
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27.2. An ap…
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Medium 6.5
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Safari 27.2, iOS 26.7.2 and i…
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Medium 6.5
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Safari 27.2, iOS 26.7.2 and i…
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Medium 5.5
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2,…
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Medium 6.5
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2,…
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Medium 5.5
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27.2. An ap…
-
Medium 5.5
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27.2. An ap…
-
Medium 5.5
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27.2. An ap…
-
Medium 5.5
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2,…