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.
CVE-2026-49840 (GCVE-0-2026-49840)
Vulnerability from cvelistv5 – Published: 2026-06-09 16:00 – Updated: 2026-06-09 17:00
VLAI
EPSS
VEX
Title
FreeSWITCH: Pre-authentication heap buffer overflow in libesl `Content-Length` parsing
Summary
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, esl_recv_event() parses Content-Length with atol() and passes the result straight to malloc(len + 1) with no sign or magnitude check. A malicious or man-in-the-middle ESL peer can send a frame with a negative Content-Length to corrupt the heap of, or crash, any process linked against libesl, before the client has authenticated to that peer. This issue has been patched in version 1.11.1.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/signalwire/freeswitch/security… | x_refsource_CONFIRM |
| https://github.com/signalwire/freeswitch/releases… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| signalwire | freeswitch |
Affected:
< 1.11.1
|
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CVE-2026-41682 (GCVE-0-2026-41682)
Vulnerability from cvelistv5 – Published: 2026-05-08 22:47 – Updated: 2026-05-11 15:56
VLAI
EPSS
VEX
Title
pupnp: Port truncation via atoi() cast in parse_uri() allows SSRF port confusion
Summary
pupnp is an SDK for development of UPnP device and control point applications. Prior to version 1.18.5, pupnp is vulnerable to SRRF port confusion due to port truncation via atoi() cast in parse_uri(). This issue has been patched in version 1.18.5.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/pupnp/pupnp/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/pupnp/pupnp/commit/def5f9a2bc4… | x_refsource_MISC |
| https://github.com/pupnp/pupnp/releases/tag/relea… | x_refsource_MISC |
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CVE-2026-26981 (GCVE-0-2026-26981)
Vulnerability from cvelistv5 – Published: 2026-02-24 02:26 – Updated: 2026-02-24 20:03
VLAI
EPSS
VEX
Title
OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp
Summary
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.0 through 3.3.6 and 3.4.0 through 3.4.4, 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`. Versions 3.3.7 and 3.4.5 contain a patch.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/AcademySoftwareFoundation/open… | x_refsource_CONFIRM |
| https://github.com/AcademySoftwareFoundation/open… | x_refsource_MISC |
| https://github.com/AcademySoftwareFoundation/open… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AcademySoftwareFoundation | openexr |
Affected:
>= 3.3.0, < 3.3.7
Affected: >= 3.4.0, < 3.4.5 |
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CVE-2025-67897 (GCVE-0-2025-67897)
Vulnerability from cvelistv5 – Published: 2025-12-14 04:35 – Updated: 2025-12-15 21:29
VLAI
EPSS
VEX
Summary
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| sequoia-pgp | sequoia |
Affected:
0 , < 2.1.0
(semver)
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CVE-2025-52566 (GCVE-0-2025-52566)
Vulnerability from cvelistv5 – Published: 2025-06-24 03:21 – Updated: 2025-06-24 21:49
VLAI
EPSS
VEX
Title
llama.cpp tokenizer signed vs. unsigned heap overflow
Summary
llama.cpp is an inference of several LLM models in C/C++. Prior to version b5721, there is a signed vs. unsigned integer overflow in llama.cpp's tokenizer implementation (llama_vocab::tokenize) (src/llama-vocab.cpp:3036) resulting in unintended behavior in tokens copying size comparison. Allowing heap-overflowing llama.cpp inferencing engine with carefully manipulated text input during tokenization process. This issue has been patched in version b5721.
Severity
8.6 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/ggml-org/llama.cpp/security/ad… | x_refsource_CONFIRM |
| https://github.com/ggml-org/llama.cpp/commit/dd6e… | x_refsource_MISC |
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CVE-2025-49847 (GCVE-0-2025-49847)
Vulnerability from cvelistv5 – Published: 2025-06-17 20:04 – Updated: 2025-06-18 13:41
VLAI
EPSS
VEX
Title
llama.cpp Vulnerable to Buffer Overflow via Malicious GGUF Model
Summary
llama.cpp is an inference of several LLM models in C/C++. Prior to version b5662, an attacker‐supplied GGUF model vocabulary can trigger a buffer overflow in llama.cpp’s vocabulary‐loading code. Specifically, the helper _try_copy in llama.cpp/src/vocab.cpp: llama_vocab::impl::token_to_piece() casts a very large size_t token length into an int32_t, causing the length check (if (length < (int32_t)size)) to be bypassed. As a result, memcpy is still called with that oversized size, letting a malicious model overwrite memory beyond the intended buffer. This can lead to arbitrary memory corruption and potential code execution. This issue has been patched in version b5662.
Severity
8.8 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/ggml-org/llama.cpp/security/ad… | x_refsource_CONFIRM |
| https://github.com/ggml-org/llama.cpp/commit/3cfb… | x_refsource_MISC |
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CVE-2025-30646 (GCVE-0-2025-30646)
Vulnerability from cvelistv5 – Published: 2025-04-09 19:53 – Updated: 2025-04-09 20:39
VLAI
EPSS
VEX
Title
Junos OS and Junos OS Evolved: Receipt of a malformed LLDP TLV results in l2cpd crash
Summary
A Signed to Unsigned Conversion Error vulnerability in the Layer 2 Control Protocol daemon (l2cpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an unauthenticated adjacent attacker sending a specifically malformed LLDP TLV to cause the l2cpd process to crash and restart, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.
When an LLDP telemetry subscription is active, receipt of a specifically malformed LLDP TLV causes the l2cpd process to crash and restart.
This issue affects:
Junos OS:
* All versions before 21.2R3-S9,
* from 21.4 before 21.4R3-S10,
* from 22.2 before 22.2R3-S6,
* from 22.4 before 22.4R3-S6,
* from 23.2 before 23.2R2-S3,
* from 23.4 before 23.4R2-S4,
* from 24.2 before 24.2R2;
Junos OS Evolved:
* All versions before 21.4R3-S10-EVO,
* from 22.2-EVO before 22.2R3-S6-EVO,
* from 22.4-EVO before 22.4R3-S6-EVO,
* from 23.2-EVO before 23.2R2-S3-EVO,
* from 23.4-EVO before 23.4R2-S4-EVO,
* from 24.2-EVO before 24.2R2-EVO.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://supportportal.juniper.net/JSA96456 | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 21.2R3-S9
(semver)
Affected: 21.4 , < 21.4R3-S10 (semver) Affected: 22.2 , < 22.2R3-S6 (semver) Affected: 22.4 , < 22.4R3-S6 (semver) Affected: 23.2 , < 23.2R2-S3 (semver) Affected: 23.4 , < 23.4R2-S4 (semver) Affected: 24.2 , < 24.2R2 (semver) |
|
| Juniper Networks | Junos OS Evolved |
Affected:
0 , < 21.4R3-S10-EVO
(semver)
Affected: 22.2-EVO , < 22.2R3-S6-EVO (semver) Affected: 22.4-EVO , < 22.4R3-S6-EVO (semver) Affected: 23.2-EVO , < 23.2R2-S3-EVO (semver) Affected: 23.4-EVO , < 23.4R2-S4-EVO (semver) Affected: 24.2-EVO , < 24.2R2-EVO (semver) |
Date Public
2025-04-09 16:00
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CVE-2025-24792 (GCVE-0-2025-24792)
Vulnerability from cvelistv5 – Published: 2025-01-29 15:27 – Updated: 2025-02-12 19:51
VLAI
EPSS
VEX
Title
Snowflake PHP PDO Driver has a Signed-to-Unsigned Conversion Error
Summary
Snowflake PHP PDO Driver is a driver that uses the PHP Data Objects (PDO) extension to connect to the Snowflake database. Snowflake discovered and remediated a vulnerability in the Snowflake PHP PDO Driver where executing unsupported queries like PUT or GET on stages causes a signed-to-unsigned conversion error that crashes the application using the Driver. This vulnerability affects versions 0.2.0 through 3.0.3. Snowflake fixed the issue in version 3.1.0.
Severity
4.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/snowflakedb/pdo_snowflake/secu… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| snowflakedb | pdo_snowflake |
Affected:
>= 0.2.0, < 3.1.0
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CVE-2023-33034 (GCVE-0-2023-33034)
Vulnerability from cvelistv5 – Published: 2023-10-03 05:00 – Updated: 2025-02-27 20:47
VLAI
EPSS
VEX
Title
Signed-to-unsigned conversion error in Audio
Summary
Memory corruption while parsing the ADSP response command.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-195 - Signed-to-unsigned conversion error
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Qualcomm, Inc. | Snapdragon |
Affected:
CSRA6620
Affected: CSRA6640 Affected: FastConnect 6200 Affected: FastConnect 6700 Affected: FastConnect 6900 Affected: Flight RB5 5G Platform Affected: QAM8295P Affected: QCA6391 Affected: QCA6574AU Affected: QCA6595 Affected: QCA6595AU Affected: QCA6696 Affected: QCA6698AQ Affected: QCM6490 Affected: QCN9011 Affected: QCN9012 Affected: QCS410 Affected: QCS610 Affected: QCS6490 Affected: QRB5165M Affected: QRB5165N Affected: Qualcomm Video Collaboration VC1 Platform Affected: Qualcomm Video Collaboration VC3 Platform Affected: Robotics RB5 Platform Affected: SA4150P Affected: SA4155P Affected: SA6145P Affected: SA6150P Affected: SA6155P Affected: SA8145P Affected: SA8150P Affected: SA8155P Affected: SA8195P Affected: SA8295P Affected: SD888 Affected: SM7315 Affected: SM7325P Affected: Smart Audio 400 Platform Affected: Snapdragon 4 Gen 1 Mobile Platform Affected: Snapdragon 480 5G Mobile Platform Affected: Snapdragon 480+ 5G Mobile Platform (SM4350-AC) Affected: Snapdragon 695 5G Mobile Platform Affected: Snapdragon 778G 5G Mobile Platform Affected: Snapdragon 778G+ 5G Mobile Platform (SM7325-AE) Affected: Snapdragon 780G 5G Mobile Platform Affected: Snapdragon 782G Mobile Platform (SM7325-AF) Affected: Snapdragon 7c+ Gen 3 Compute Affected: Snapdragon 888 5G Mobile Platform Affected: Snapdragon 888+ 5G Mobile Platform (SM8350-AC) Affected: WCD9335 Affected: WCD9341 Affected: WCD9370 Affected: WCD9375 Affected: WCD9380 Affected: WCD9385 Affected: WCN3950 Affected: WCN3980 Affected: WCN3988 Affected: WCN6740 Affected: WSA8810 Affected: WSA8815 Affected: WSA8830 Affected: WSA8835 |
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CVE-2023-28063 (GCVE-0-2023-28063)
Vulnerability from cvelistv5 – Published: 2024-02-06 07:38 – Updated: 2024-08-02 12:30
VLAI
EPSS
VEX
Summary
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00021478… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | CPG BIOS |
Affected:
1.24.0
Affected: 1.17.0 Affected: 1.13.0 Affected: 1.5.1 Affected: 1.21.0 Affected: 1.20.0 Affected: 1.23.0 Affected: 1.26.0 Affected: 1.25.0 Affected: 1.15.0 Affected: 1.12.0 Affected: 2.20.0 Affected: 1.14.0 Affected: 1.27.0 Affected: 1.19.0 Affected: 1.22.1 Affected: 2.21.0 Affected: 1.18.0 Affected: 1.7.0 Affected: 1.28.0 Affected: 1.22.0 Affected: 1.29.0 Affected: 1.30.0 Affected: 1.11.0 Affected: 1.13.1 Affected: 1.26.1 Affected: 1.13.2 Affected: 1.14.1 Affected: 1.33.0 Affected: 1.31.0 Affected: 1.12.1 Affected: 1.18.1 Affected: 1.10.0 Affected: 2.14.0 Affected: 1.1.28 Affected: 1.4.1 Affected: 2.5.1 Affected: 2.4.0 Affected: 2.6.1 Affected: 1.26.8 Affected: 1.24.1 Affected: 1.17.1 Affected: 1.29.1 Affected: 1.1.0 Affected: 1.16.0 Affected: 3.17.0 Affected: 2.19.0 Affected: 1.8.1 |
Date Public
2023-06-13 06:30
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.