Common Weakness Enumeration
CWE-908
Weakness AllowedUse of Uninitialized Resource
Abstraction: Base · Status: Incomplete
The product uses or accesses a resource that has not been initialized.
Mapping guidance
This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.
Modes of introduction
Implementation
Detection methods
Automated Static Analysis
Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)
Effectiveness: High
Content history
Submission: CWE Content Team
· MITRE
· 2012-12-21
· CWE 2.4
New weakness based on discussion on the CWE research list in December 2012.
Modification: CWE Content Team
· MITRE
· 2017-11-08
· CWE 3.0
updated Taxonomy_Mappings
Modification: CWE Content Team
· MITRE
· 2019-01-03
· CWE 3.2
updated Relationships
Modification: CWE Content Team
· MITRE
· 2020-02-24
· CWE 4.0
updated Description, Relationships
Modification: CWE Content Team
· MITRE
· 2020-08-20
· CWE 4.2
updated Relationships
Modification: CWE Content Team
· MITRE
· 2020-12-10
· CWE 4.3
updated Relationships
Modification: CWE Content Team
· MITRE
· 2021-03-15
· CWE 4.4
updated Demonstrative_Examples, Observed_Examples
Modification: CWE Content Team
· MITRE
· 2023-01-31
· CWE 4.10
updated Description, Potential_Mitigations
Modification: CWE Content Team
· MITRE
· 2023-04-27
· CWE 4.11
updated Relationships
Modification: CWE Content Team
· MITRE
· 2023-06-29
· CWE 4.12
updated Mapping_Notes
Modification: CWE Content Team
· MITRE
· 2025-09-09
· CWE 4.18
updated References
Modification: CWE Content Team
· MITRE
· 2025-12-11
· CWE 4.19
updated Detection_Factors, Observed_Examples
Modification: CWE Content Team
· MITRE
· 2026-10-28
· CWE 5.0
updated Common_Consequences, Demonstrative_Examples, Description, Observed_Examples, References
1119 vulnerabilities reference this CWE, most recent first.
CVE-2026-120754 (GCVE-0-2026-120754)
Vulnerability from cvelistv5 – Published: 2026-11-03 15:24 – Updated: 2026-11-03 17:58
VLAI
EPSS
VEX
Title
Uninitialized Heap Memory Disclosure via Truncated Chunk in HDF5 Scale-Offset Filter
Summary
HDF5 through 2.2.0 contains an uninitialized memory read vulnerability in H5Z__filter_scaleoffset() in src/H5Zscaleoffset.c. The decode path validates reads against the allocated size of the chunk buffer rather than the number of bytes actually read from the file. Because H5D__chunk_lock() deliberately sizes filtered chunk buffers to the larger of the stored and unfiltered chunk sizes and fills only the stored bytes, a truncated chunk passes these bounds checks and is decompressed from the uninitialized remainder of the allocation. Unrelated heap contents are then returned to the caller as dataset data. Because the reads remain within the allocation, the issue is not detected by AddressSanitizer. An attacker who can get a user or application to read a dataset from a crafted HDF5 file can cause disclosure of process memory. This issue exists because of an incomplete fix for CVE-2026-19029.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 17:58 UTC
CWE
- CWE-908 - Use of uninitialized resource
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The HDF Group | Scale-Offset Filter |
Affected:
< 2.3.0
|
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CVE-2026-120684 (GCVE-0-2026-120684)
Vulnerability from cvelistv5 – Published: 2026-11-03 18:40 – Updated: 2026-11-03 20:11
VLAI
EPSS
VEX
Title
MongoDB C Driver GridFS gap lets a shared writer recover a protected client's password
Summary
A memory-initialization flaw in the legacy GridFS file handling of the MongoDB C Driver can cause uninitialized process memory to be treated as valid file content and stored on the server. A database user holding ordinary write access to a shared storage area can arrange conditions under which an application later appends to such a file and writes that memory into records the same user is permitted to read, which may result in unintended disclosure of sensitive information from the application's process, including credentials.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 20:10 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
1 reference
Impacted products
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CVE-2026-120247 (GCVE-0-2026-120247)
Vulnerability from cvelistv5 – Published: 2026-11-01 00:57 – Updated: 2026-11-06 18:56
VLAI
EPSS
VEX
Title
FFmpeg 2.3 through 9.0.2 Huffyuv Decoder Uninitialized Heap Memory Disclosure
Summary
FFmpeg 2.3 through 9.0.2 contains a use of uninitialized resource vulnerability in the Huffyuv decoder that allows attackers to leak heap memory into decoded pixels via short packed-BGR bitstreams. Attackers can craft a Huffyuv BGR24/BGRA video whose entropy data ends early, causing decode_slice() to add uninitialized s->temp[0] bytes into output frames, exposing heap contents.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 18:55 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24869 | issue-tracking |
| https://github.com/FFmpeg/FFmpeg/commit/7c7370735… | patch |
| https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/liba… | technical-description |
| https://github.com/FFmpeg/FFmpeg | product |
| https://www.vulncheck.com/advisories/ffmpeg-2.3-t… | third-party-advisory |
Impacted products
Date Public
2026-10-11 00:00
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CVE-2026-120245 (GCVE-0-2026-120245)
Vulnerability from cvelistv5 – Published: 2026-11-01 00:57 – Updated: 2026-11-02 14:40
VLAI
EPSS
VEX
Title
FFmpeg 0.10 through 9.0.2 Uninitialized Memory Disclosure via Sun Raster Decoder
Summary
FFmpeg 0.10 through 9.0.2 contains a use of uninitialized resource vulnerability in sunrast_decode_frame() that leaks heap memory when decoding truncated 1-bit and 4-bit paletted Sun Raster images. Attackers can craft a truncated Sun Raster file so the uncleared temporary bitmap is expanded into PAL8 pixels, exposing stale heap contents such as allocator words in decoded output.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 14:39 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24877 | issue-tracking |
| https://github.com/FFmpeg/FFmpeg/commit/356a391bf… | patch |
| https://github.com/FFmpeg/FFmpeg/commit/66b6ca270… | patch |
| https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/liba… | technical-description |
| https://github.com/FFmpeg/FFmpeg | product |
| https://www.vulncheck.com/advisories/ffmpeg-0.10-… | third-party-advisory |
Impacted products
Date Public
2026-10-10 00:00
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CVE-2026-120244 (GCVE-0-2026-120244)
Vulnerability from cvelistv5 – Published: 2026-11-01 00:57 – Updated: 2026-11-02 17:44
VLAI
EPSS
VEX
Title
FFmpeg 2.1 through 9.0.2 Uninitialized Memory Leak via PCX Decoder
Summary
FFmpeg 2.1 through 9.0.2 contains a use of uninitialized resource vulnerability in the PCX decoder that allows attackers to leak heap memory through truncated RLE scanlines. Attackers can craft a PCX image whose RLE data ends early, causing pcx_decode_frame() to copy uninitialized av_malloc() buffer contents into visible decoded pixels.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 17:03 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24868 | issue-tracking |
| https://github.com/FFmpeg/FFmpeg/commit/ecd5dfc30… | patch |
| https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/liba… | technical-description |
| https://github.com/FFmpeg/FFmpeg | product |
| https://www.vulncheck.com/advisories/ffmpeg-2.1-t… | third-party-advisory |
Impacted products
Date Public
2026-10-11 00:00
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CVE-2026-119602 (GCVE-0-2026-119602)
Vulnerability from cvelistv5 – Published: 2026-10-30 13:18 – Updated: 2026-10-30 15:53
VLAI
EPSS
VEX
Title
libmspack through 0.11alpha Uninitialized Memory Disclosure via MS-ZIP Decompressor Window
Summary
libmspack through 0.11alpha contains an uninitialized memory disclosure vulnerability in the MS-ZIP decompressor that allows attackers to leak heap data via unchecked back-reference distances. Attackers can supply a crafted MS-ZIP CAB file whose first block begins with a back-reference, causing cabd->extract() to write up to 32 KiB of stale heap memory into extracted output.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 15:21 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/kyz/libmspack/issues/60 | issue-tracking |
| https://github.com/kyz/libmspack/blob/v0.11alpha/… | technical-description |
| https://hackmd.io/@haindpwn/libmspack-mszip-unini… | third-party-advisory |
| https://github.com/kyz/libmspack | product |
| https://www.vulncheck.com/advisories/libmspack-th… | third-party-advisory |
Impacted products
Date Public
2026-10-21 00:00
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CVE-2026-119375 (GCVE-0-2026-119375)
Vulnerability from cvelistv5 – Published: 2026-10-30 11:30 – Updated: 2026-10-30 15:52
VLAI
EPSS
VEX
Title
SQLite before 3.54.0 Information Disclosure via WAL Page Size Mismatch
Summary
SQLite before 3.54.0 contains an information disclosure vulnerability that allows attackers to read uninitialized page-cache memory by supplying a WAL file with an undersized page size. Attackers can craft a database and WAL file whose oversized record payload makes queries like substr() return stale bytes, disclosing other table rows and internal pointers.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 15:52 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://sqlite.org/bugs/info/2026-08-17T15:54:41Z | issue-tracking |
| https://sqlite.org/src/info/f9b4ee369557c36c | patch |
| https://github.com/sqlite/sqlite/commit/e5bf11982… | patch |
| https://github.com/sqlite/sqlite/blob/version-3.5… | technical-description |
| https://sqlite.org/releaselog/3_54_0.html | release-notes |
| https://abraxaslabs.tech/research/sqlite-wal-pagesize | third-party-advisory |
| https://github.com/sqlite/sqlite | product |
| https://www.vulncheck.com/advisories/sqlite-befor… | third-party-advisory |
Impacted products
Date Public
2026-08-17 00:00
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CVE-2026-116739 (GCVE-0-2026-116739)
Vulnerability from cvelistv5 – Published: 2026-10-26 21:52 – Updated: 2026-11-04 15:18
VLAI
EPSS
VEX
Title
VMime through 0.9.2 Uninitialized Stack Memory Disclosure via uuencode Decoder
Summary
VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode function that writes uninitialized stack memory into decoded output for over-long lines. Attackers can send a crafted uuencode or x-uuencode MIME part with a large line length byte to leak up to 15 bytes of stack contents per line in decoded attachments.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 15:18 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/kisli/vmime/pull/363 | issue-trackingpatch |
| https://github.com/kisli/vmime/commit/e85925eddc6… | patch |
| https://github.com/kisli/vmime | product |
| https://github.com/kisli/vmime/blob/v0.9.2/src/vm… | technical-description |
| https://hackmd.io/@haindpwn/vmime-uuencode-decode… | third-party-advisory |
| https://www.vulncheck.com/advisories/vmime-throug… | third-party-advisory |
Date Public
2026-10-23 00:00
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CVE-2026-116180 (GCVE-0-2026-116180)
Vulnerability from cvelistv5 – Published: 2026-10-25 13:20 – Updated: 2026-10-26 19:48
VLAI
EPSS
VEX
Title
vLLM from 0.8.5 before 0.31.0 Cross-Tenant DoS via Uninitialized LogprobsTensors
Summary
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Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-26 19:38 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/vllm-project/vllm/security/adv… | vendor-advisory |
| https://www.vulncheck.com/advisories/vllm-from-0.… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| vllm-project | vllm |
Affected:
0.8.5 , < 0.31.0
(semver)
Unaffected: 0.31.0 (semver) cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* |
Date Public
2026-10-09 00:00
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CVE-2026-115386 (GCVE-0-2026-115386)
Vulnerability from cvelistv5 – Published: 2026-10-22 19:13 – Updated: 2026-10-23 15:00
VLAI
EPSS
VEX
Title
Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 Memory Disclosure via fd_readdir
Summary
Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains an information disclosure vulnerability in the WASIp1 fd_readdir implementation that copies uninitialized struct padding into guest memory. Guests with a preopened directory can list entries to receive three bytes of leftover host stack or heap memory per directory entry.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 14:48 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/bytecodealliance/wasmtime/secu… | vendor-advisory |
| https://www.vulncheck.com/advisories/wasmtime-bef… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| bytecodealliance | wasmtime |
Affected:
0 , < 36.0.17
(semver)
Unaffected: 36.0.17 (semver) Affected: 37.0.0 , < 48.0.4 (semver) Unaffected: 48.0.4 (semver) Affected: 49.0.0 , < 49.0.2 (semver) Unaffected: 49.0.2 (semver) cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:* cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:* cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:* |
Date Public
2026-10-02 00:00
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N",
"version": "3.1"
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],
"problemTypes": [
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"descriptions": [
{
"cweId": "CWE-908",
"description": "Use of Uninitialized Resource",
"lang": "en",
"type": "CWE"
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],
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"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"references": [
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"name": "GitHub Security Advisory (GHSA-96f6-r43r-8c24)",
"tags": [
"vendor-advisory"
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"url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-96f6-r43r-8c24"
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{
"name": "VulnCheck Advisory: Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 Memory Disclosure via fd_readdir",
"tags": [
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"url": "https://www.vulncheck.com/advisories/wasmtime-before-36.0.17-37.0.0-before-48.0.4-and-49.0.0-before-49.0.2-memory-disclosure-via-fd-readdir"
}
],
"title": "Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 Memory Disclosure via fd_readdir",
"x_generator": {
"engine": "vulncheck-endgame"
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"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-115386",
"datePublished": "2026-10-22T19:13:52.931Z",
"dateReserved": "2026-10-22T11:25:27.610Z",
"dateUpdated": "2026-10-23T15:00:52.816Z",
"state": "PUBLISHED"
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Mitigation
Implementation
Explicitly initialize the resource before use. If this is performed through an API function or standard procedure, follow all required steps.
Mitigation
Implementation
Pay close attention to complex conditionals that affect initialization, since some branches might not perform the initialization.
Mitigation
Implementation
Avoid race conditions (CWE-362) during initialization routines.
Mitigation
Build and Compilation
Run or compile the product with settings that generate warnings about uninitialized variables or data.
No CAPEC attack patterns related to this CWE.