Common Weakness Enumeration
CWE-908
AllowedUse of Uninitialized Resource
Abstraction: Base · Status: Incomplete
The product uses or accesses a resource that has not been initialized.
899 vulnerabilities reference this CWE, most recent first.
CVE-2026-70631 (GCVE-0-2026-70631)
Vulnerability from cvelistv5 – Published: 2026-08-06 21:25 – Updated: 2026-08-14 16:51 X_Open Source
VLAI
EPSS
VEX
Title
FFmpeg 0.5 < 9.0 Uninitialized Heap Memory Read in TIFF Decoder
Summary
FFmpeg versions from 0.5 up to, but not including, 9.0 contain an uninitialized heap memory disclosure vulnerability in the native TIFF decoder in libavcodec/tiff.c. An attacker who can cause FFmpeg to decode a crafted TIFF file can supply a valid Deflate-compressed strip that terminates successfully after producing fewer bytes than the declared strip requires. The tiff_unpack_zlib() function allocates a heap buffer sized for the full declared strip but copies all declared rows via memcpy() regardless of how many bytes zlib actually decompressed, causing unwritten bytes that can contain stale data from prior heap allocations to be incorporated into decoded image output and potentially exposing sensitive data in persistent services.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-08 02:44 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23899 | issue-tracking |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/a991… | related |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/2f23… | patch |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/3c28… | patch |
| https://www.vulncheck.com/advisories/ffmpeg-unini… | third-party-advisory |
Impacted products
Date Public
2026-07-24 00:00
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CVE-2026-70630 (GCVE-0-2026-70630)
Vulnerability from cvelistv5 – Published: 2026-08-06 21:25 – Updated: 2026-08-14 16:51 X_Open Source
VLAI
EPSS
VEX
Title
FFmpeg 3.0 < 9.0 Uninitialized Heap Memory Read in Screenpresso Decoder
Summary
FFmpeg versions from 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native Screenpresso decoder (libavcodec/screenpresso.c) that allows attackers to recover sensitive memory contents by supplying a crafted SPV1 packet with a valid zlib stream that decompresses fewer bytes than the full frame requires. The screenpresso_decode_frame() function fails to validate the produced byte count before calling av_image_copy_plane() to copy the complete frame dimensions from the persistent ctx->inflated_buf buffer, causing unwritten heap memory from prior allocations or prior frames to be copied into decoded output and potentially exposing sensitive data such as userspace addresses from persistent decoding services.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 17:09 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23896 | issue-tracking |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/9a32… | related |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/7058… | patch |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/c226… | patch |
| https://www.vulncheck.com/advisories/ffmpeg-unini… | third-party-advisory |
Impacted products
Date Public
2026-07-24 00:00
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CVE-2026-70629 (GCVE-0-2026-70629)
Vulnerability from cvelistv5 – Published: 2026-08-06 21:25 – Updated: 2026-08-14 16:51 X_Open Source
VLAI
EPSS
VEX
Title
FFmpeg 3.0 < 9.0 Uninitialized Heap Memory Read in RSCC Decoder
Summary
FFmpeg versions from 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native RSCC decoder (libavcodec/rscc.c) that allows attackers to disclose heap memory contents by supplying a crafted video file with a compressed tile that decompresses fewer bytes than the declared tile geometry requires. When rscc_decode_frame() calls av_image_copy_plane() without validating the decompressed byte count against the tile dimensions, the unwritten suffix of the persistent intermediate buffer ctx->inflated_buf is copied into the decoded frame, potentially exposing data from prior heap allocations or previous decoded frames in persistent decoding services.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 16:15 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23895 | issue-tracking |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/533a… | related |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/cd1f… | patch |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/a5fe… | patch |
| https://www.vulncheck.com/advisories/ffmpeg-unini… | third-party-advisory |
Impacted products
Date Public
2026-07-24 00:00
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CVE-2026-70459 (GCVE-0-2026-70459)
Vulnerability from cvelistv5 – Published: 2026-08-13 14:43 – Updated: 2026-08-14 19:45
VLAI
EPSS
VEX
Title
rsync 3.0.0 < 3.5.0 Daemon Crash via Malformed File List Entry
Summary
rsync 3.0.0 before 3.5.0 contains a null pointer dereference vulnerability in the daemon child process that allows remote attackers to crash the daemon by sending a file list whose first entry is a dot entry not typed as a directory. The daemon dereferences the first file list entry as a directory structure pointer without verifying the entry type, resulting in an invalid or uninitialized pointer dereference that terminates the client connection.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 18:30 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RsyncProject/rsync/security/ad… | vendor-advisory |
| https://github.com/RsyncProject/rsync/releases/ta… | release-notes |
| https://www.vulncheck.com/advisories/rsync-daemon… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RsyncProject | rsync |
Affected:
3.0.0 , ≤ 3.4.4
(semver)
Unaffected: 3.5.0 (semver) cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:* |
Date Public
2026-08-12 00:00
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CVE-2026-70317 (GCVE-0-2026-70317)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:05 – Updated: 2026-08-25 22:47
VLAI
EPSS
VEX
Title
Microsoft Office Information Disclosure Vulnerability
Summary
Use of uninitialized resource in Microsoft Office allows an unauthorized attacker to disclose information locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 15:37 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2016 |
Affected:
16.0.0 , < 16.0.5565.1001
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.112.26081010
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.112.26081010
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.112.26081010
(custom)
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Date Public
2026-08-11 14:00
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CVE-2026-68799 (GCVE-0-2026-68799)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:07 – Updated: 2026-08-25 22:48
VLAI
EPSS
VEX
Title
Microsoft Excel Information Disclosure Vulnerability
Summary
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 20:37 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5565.1001
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.112.26081010
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.112.26081010
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.112.26081010
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20175
(custom)
|
Date Public
2026-08-11 14:00
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CVE-2026-68744 (GCVE-0-2026-68744)
Vulnerability from cvelistv5 – Published: 2026-08-04 05:28 – Updated: 2026-08-04 15:03
VLAI
EPSS
VEX
Title
Sssd: sssd: nss responder uninitialized heap disclosure in initgroups reply
Summary
A flaw was found in SSSD. The sss_nss_protocol_fill_initgr() function in the NSS responder pre-allocates reply space for all group entries but does not shrink the packet when groups are skipped, causing uninitialized heap bytes to be transmitted to the client. A local attacker can exploit this to disclose cached directory data and heap layout information from the sssd_nss process.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 14:19 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-68744 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2509761 | issue-trackingx_refsource_REDHAT |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| 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
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2026-08-03 07:39
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CVE-2026-66038 (GCVE-0-2026-66038)
Vulnerability from cvelistv5 – Published: 2026-07-24 19:39 – Updated: 2026-07-28 01:06 X_Open Source
VLAI
EPSS
VEX
Title
FFmpeg LCL/ZLIB Video Decoder Information Disclosure via lcldec.c
Summary
FFmpeg through 8.1.2, fixed in commit 8670835, contains an information disclosure vulnerability in the LCL/ZLIB video decoder that allows attackers to expose uninitialized heap memory by supplying a valid zlib stream that inflates to fewer bytes than the expected frame size. The zlib_decomp() function in lcldec.c treats short decompression as non-fatal and continues to the RGB24 conversion path, which copies a full frame's worth of rows from the allocation buffer using original frame dimensions, causing uninitialized heap contents including pointer-derived allocator bytes to be copied into the attacker-observable AVFrame output and potentially defeating ASLR in long-lived media processing services.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-24 20:14 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23626 | issue-tracking |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/e7cb… | patch |
| https://www.vulncheck.com/advisories/ffmpeg-lcl-z… | third-party-advisory |
Impacted products
Date Public
2026-07-04 00:00
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CVE-2026-66034 (GCVE-0-2026-66034)
Vulnerability from cvelistv5 – Published: 2026-07-24 16:42 – Updated: 2026-07-28 01:06 X_Open Source
VLAI
EPSS
VEX
Title
libssh2 Heap Out-of-Bounds Read via publickey subsystem
Summary
libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In libssh2_publickey_list_fetch(), the version 1 response parser reads a server-controlled comment_len value and advances the parse pointer without verifying sufficient bytes remain in the buffer, causing the out-of-bounds read to leak heap pointers from adjacent allocations defeating ASLR, followed by heap allocator state corruption when the error cleanup path frees an uninitialized pointer from a non-zeroed realloc() region.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-24 00:00 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/libssh2/libssh2/pull/2202 | issue-trackingpatch |
| https://github.com/libssh2/libssh2/commit/a13bb6c… | patch |
| https://www.vulncheck.com/advisories/libssh2-heap… | third-party-advisory |
Impacted products
Date Public
2026-07-04 00:00
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CVE-2026-63381 (GCVE-0-2026-63381)
Vulnerability from cvelistv5 – Published: 2026-08-20 17:50 – Updated: 2026-08-21 21:46
VLAI
EPSS
VEX
Title
Libevent: Dangling Pointer in `evbuffer_add_buffer_reference`
Summary
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a use-after-free in buffer.c when evbuffer_add_buffer_reference processes an output buffer whose out_total_len is zero. evbuffer_free_all_chains frees the initial empty chain without resetting outbuf->first, outbuf->last, or outbuf->last_with_datap, and APPEND_CHAIN_MULTICAST subsequently dereferences the dangling chain pointer. A caller that can drive this buffer state can cause memory corruption or a process crash. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 20:58 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/libevent/libevent/security/adv… | x_refsource_CONFIRM |
| https://github.com/libevent/libevent/commit/5cb95… | x_refsource_MISC |
| https://github.com/libevent/libevent/commit/9db09… | x_refsource_MISC |
| https://github.com/libevent/libevent/releases/tag… | x_refsource_MISC |
| https://github.com/libevent/libevent/releases/tag… | x_refsource_MISC |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-63381",
"options": [
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"timestamp": "2026-08-21T20:58:46.599802Z",
"version": "2.0.3"
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{
"product": "libevent",
"vendor": "libevent",
"versions": [
{
"status": "affected",
"version": "\u003e= 2.2.0-alpha, \u003c 2.2.2-alpha"
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"version": "\u003c 2.1.13"
}
]
}
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}
],
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"attackRequirements": "PRESENT",
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"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
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"vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
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"name": "https://github.com/libevent/libevent/commit/5cb95ba2f804f8aff46f88d58391c71e1251cd1c",
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"url": "https://github.com/libevent/libevent/commit/5cb95ba2f804f8aff46f88d58391c71e1251cd1c"
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"name": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
"tags": [
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"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
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"source": {
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"discovery": "UNKNOWN"
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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.