Common Weakness Enumeration
CWE-789
AllowedMemory Allocation with Excessive Size Value
Abstraction: Variant · Status: Draft
The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.
339 vulnerabilities reference this CWE, most recent first.
CVE-2026-65315 (GCVE-0-2026-65315)
Vulnerability from cvelistv5 – Published: 2026-07-21 21:18 – Updated: 2026-07-22 18:24
VLAI
EPSS
VEX
Title
Ollama Remote Denial of Service via Attacker-Controlled Allocation in GGUF Metadata Parser
Summary
Ollama (HEAD f0078ae) contains an uncontrolled memory allocation vulnerability in the GGUF metadata parser that allows remote attackers to crash the server by supplying a crafted GGUF file with attacker-controlled length and count fields in string lengths, tensor dimension counts, and metadata array counts that are used as allocation sizes without validation against remaining file size. Attackers can upload a sub-1KB crafted GGUF file via the blob upload and model create or pull API endpoints to trigger unrecoverable Go runtime out-of-memory fatal errors or makeslice panics that bypass recovery middleware and crash the entire server process.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/ollama/ollama/issues/17042 | |
| https://github.com/ollama/ollama | patch |
| https://www.vulncheck.com/advisories/ollama-remot… | third-party-advisory |
Date Public
2026-07-21 00:00
Credits
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CVE-2026-59938 (GCVE-0-2026-59938)
Vulnerability from cvelistv5 – Published: 2026-07-08 17:24 – Updated: 2026-07-09 13:58
VLAI
EPSS
VEX
Title
pypdf: Possible large memory usage for wrong image dimensions
Summary
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Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3888 | x_refsource_MISC |
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| https://github.com/py-pdf/pypdf/releases/tag/6.14.0 | x_refsource_MISC |
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CVE-2026-59844 (GCVE-0-2026-59844)
Vulnerability from cvelistv5 – Published: 2026-07-21 11:32 – Updated: 2026-07-22 19:07
VLAI
EPSS
VEX
Title
Libssh: libssh: denial of service via oversized sftp read length
Summary
A flaw was found in libssh. A remote authenticated client can issue SSH_FXP_READ requests with an arbitrarily large length, causing a libssh SFTP server to allocate excessive memory and potentially exhaust it through repeated requests.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:42922 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-59844 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2498177 | issue-trackingx_refsource_REDHAT |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images |
Unaffected:
0.12.1-4.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9 |
Date Public
2026-07-21 11:17
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CVE-2026-59204 (GCVE-0-2026-59204)
Vulnerability from cvelistv5 – Published: 2026-07-14 15:38 – Updated: 2026-07-21 18:41
VLAI
EPSS
VEX
Title
Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial of service
Summary
Pillow is a Python imaging library. From 8.2.0 through 12.2.0, src/libImaging/Jpeg2KDecode.c accumulates total_component_width across every tile in a JPEG2000 image instead of recomputing it per tile, allowing a crafted tiled JPEG2000 file to force substantially higher transient memory usage and trigger out-of-memory failures during decoding. This issue is fixed in version 12.3.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/pull/9704 | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/commit/13… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
>= 8.2.0, < 12.3.0
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CVE-2026-58559 (GCVE-0-2026-58559)
Vulnerability from cvelistv5 – Published: 2026-07-15 12:42 – Updated: 2026-07-15 13:03
VLAI
EPSS
VEX
Summary
DoS vulnerability in the vibration service. Impact: Successful exploitation of this vulnerability may affect availability.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory allocation with excessive size value
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Huawei | Harmony OS |
Affected:
4.3.1
Affected: 4.3.0 Affected: 4.2.0 Affected: 4.0.0 |
|
| Huawei | EMUI |
Affected:
15.0.0
Affected: 14.2.0 Affected: 14.0.0 |
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CVE-2026-55782 (GCVE-0-2026-55782)
Vulnerability from cvelistv5 – Published: 2026-07-10 16:46 – Updated: 2026-07-14 02:00
VLAI
EPSS
VEX
Title
NanaZip: Unbounded memory allocation (DoS) in NanaZip WebAssembly parser via attacker-controlled section/name length fields
Summary
NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's WebAssembly archive handler in NanaZip.Codecs.Archive.WebAssembly.cpp allocates buffers from attacker-controlled 32-bit section and custom-name length fields without validating them against the data present in the file. A tiny crafted module can force multi-gigabyte allocations during listing or extraction through NameSize, Information.Size, and std::string or vector allocation paths, causing memory exhaustion or process termination. This issue is fixed in version 6.5.1749.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/M2Team/NanaZip/security/adviso… | x_refsource_CONFIRM |
| https://github.com/M2Team/NanaZip/commit/1ce90f2d… | x_refsource_MISC |
| https://github.com/M2Team/NanaZip/commit/56aee890… | x_refsource_MISC |
| https://github.com/M2Team/NanaZip/commit/92b12a6e… | x_refsource_MISC |
| https://github.com/M2Team/NanaZip/releases/tag/6.… | x_refsource_MISC |
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CVE-2026-55781 (GCVE-0-2026-55781)
Vulnerability from cvelistv5 – Published: 2026-07-10 16:50 – Updated: 2026-07-10 20:58
VLAI
EPSS
VEX
Title
NanaZip: Unbounded memory allocation (DoS) in NanaZip UFS parser via unvalidated fs_bsize/fs_fsize superblock fields
Summary
NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's UFS and FFS image handler in NanaZip.Codecs.Archive.Ufs.cpp validates the superblock block size only against the MINBSIZE lower bound and does not validate the fs_fsize fragment size, allowing attacker-controlled 32-bit fields to flow into indirect-block, directory, and extraction buffer allocations. A tiny crafted UFS image can force multi-gigabyte allocations during open or extraction, causing memory exhaustion or process termination. This issue is fixed in version 6.5.1749.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/M2Team/NanaZip/security/adviso… | x_refsource_CONFIRM |
| https://github.com/M2Team/NanaZip/commit/6415b6bf… | x_refsource_MISC |
| https://github.com/M2Team/NanaZip/releases/tag/6.… | x_refsource_MISC |
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CVE-2026-55407 (GCVE-0-2026-55407)
Vulnerability from cvelistv5 – Published: 2026-07-16 15:57 – Updated: 2026-07-16 18:04
VLAI
EPSS
VEX
Title
Buffa: Memory Exhaustion Denial of Service in decode_unknown_field via Unbounded Allocation
Summary
Buffa is a pure-Rust Protocol Buffers implementation with first-class protobuf editions support. Prior to 0.8.0, the decode_unknown_field function in buffa's protobuf decoder allocated heap memory in proportion to untrusted input (unknown fields in the serialized protobuf) without enforcing an allocation budget, affecting any message decoded from untrusted input using code generated with preserve_unknown_fields=true (the default); a small, well-formed payload of nested unknown fields inside a StartGroup could trigger roughly 22x memory amplification (for example a 64 MiB input forcing about 1.4 GB of heap allocation), and length-delimited unknown fields could be sized arbitrarily, so an unauthenticated attacker could crash a process through memory exhaustion because the top-level message size cap did not account for in-decode amplification. This issue is fixed in version 0.8.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/anthropics/buffa/security/advi… | x_refsource_CONFIRM |
| https://github.com/anthropics/buffa/pull/184 | x_refsource_MISC |
| https://github.com/anthropics/buffa/commit/278fa4… | x_refsource_MISC |
| https://github.com/anthropics/buffa/releases/tag/v0.8.0 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| anthropics | buffa |
Affected:
< 0.8.0
|
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CVE-2026-55380 (GCVE-0-2026-55380)
Vulnerability from cvelistv5 – Published: 2026-07-06 18:50 – Updated: 2026-07-06 19:23
VLAI
EPSS
VEX
Title
Pillow GdImageFile decompression bomb protection bypass
Summary
Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageFile._open() read image dimensions from the GD 2.x header and stored them in self._size without calling Image._decompression_bomb_check(), allowing a crafted .gd file to trigger excessive C-heap allocation when loaded. This issue is fixed in version 12.3.0.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/commit/f3… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/blob/main… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 12.3.0
|
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CVE-2026-55379 (GCVE-0-2026-55379)
Vulnerability from cvelistv5 – Published: 2026-07-06 18:52 – Updated: 2026-07-06 19:17
VLAI
EPSS
VEX
Title
Pillow BdfFontFile`: `Image.new()` called without `_decompression_bomb_check()` — bomb protection bypass via font loading
Summary
Pillow is a Python imaging library. Prior to 12.3.0, PIL/BdfFontFile.py bdf_char() read the BBX width and height field from a BDF font file and passed attacker-controlled dimensions to Image.new() without calling Image._decompression_bomb_check(), bypassing Pillow's documented decompression bomb protection and allowing excessive memory allocation. This issue is fixed in version 12.3.0.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/python-pillow/Pillow/security/… | x_refsource_CONFIRM |
| https://github.com/python-pillow/Pillow/commit/0a… | x_refsource_MISC |
| https://github.com/python-pillow/Pillow/blob/main… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-pillow | Pillow |
Affected:
< 12.3.0
|
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Mitigation
Implementation
Architecture and Design
Perform adequate input validation against any value that influences the amount of memory that is allocated. Define an appropriate strategy for handling requests that exceed the limit, and consider supporting a configuration option so that the administrator can extend the amount of memory to be used if necessary.
Mitigation
Operation
Run your program using system-provided resource limits for memory. This might still cause the program to crash or exit, but the impact to the rest of the system will be minimized.
No CAPEC attack patterns related to this CWE.