Common Weakness Enumeration
CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
1661 vulnerabilities reference this CWE, most recent first.
CVE-2026-125231 (GCVE-0-2026-125231)
Vulnerability from cvelistv5 – Published: 2026-11-09 19:11 – Updated: 2026-11-09 21:06
VLAI
EPSS
VEX
Title
FFmpeg 4.4 through 9.0.2 NULL Pointer Dereference via adx_decode_header()
Summary
FFmpeg 4.4 through 9.0.2 contains a NULL pointer dereference vulnerability in libavcodec/adxdec.c because adx_decode_header() updates the channel layout before validating the sample rate. Attackers can supply a crafted ADX/AAX stream with mid-stream new-extradata side data carrying an invalid sample rate, causing adx_decode() to write through NULL plane pointers and crash the application.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 20:57 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck
CNA
References
5 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25703 | issue-tracking |
| https://github.com/FFmpeg/FFmpeg/commit/515dcad73… | 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-4.4-t… | third-party-advisory |
Impacted products
Date Public
2026-11-03 00:00
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CVE-2026-125216 (GCVE-0-2026-125216)
Vulnerability from cvelistv5 – Published: 2026-11-09 19:11 – Updated: 2026-11-09 21:06
VLAI
EPSS
VEX
Title
FFmpeg through 9.0.2 DPX Encoder NULL Pointer Dereference via encode_gbrp12()
Summary
FFmpeg through 9.0.2 contains a NULL pointer dereference vulnerability in libavcodec/dpxenc.c that allows attackers to crash the process via unvalidated bits_per_raw_sample for RGB48 input. Attackers can supply a 12-bit RGB image, such as JPEG 2000, that when transcoded to DPX selects encode_gbrp12() and dereferences NULL plane pointers, causing denial of service.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 21:00 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck
CNA
References
5 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25690 | issue-tracking |
| https://github.com/FFmpeg/FFmpeg/commit/aa5fd7d28… | 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-throu… | third-party-advisory |
Impacted products
Date Public
2026-11-02 00:00
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CVE-2026-125215 (GCVE-0-2026-125215)
Vulnerability from cvelistv5 – Published: 2026-11-09 19:11 – Updated: 2026-11-09 21:06
VLAI
EPSS
VEX
Title
FFmpeg 7.1 through 9.0.2 NULL Pointer Dereference via ff_dovi_rpu_generate()
Summary
FFmpeg 7.1 through 9.0.2 contains a NULL pointer dereference vulnerability in ff_dovi_rpu_generate() in libavcodec/dovi_rpuenc.c that allows attackers to crash applications via crafted Dolby Vision RPU metadata. Attackers can supply streams with default or alternating omitted DM blocks to the dovi_rpu bitstream filter with compression enabled, causing denial of service.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 21:00 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck
CNA
References
7 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24514 | issue-tracking |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25606 | issue-tracking |
| https://github.com/FFmpeg/FFmpeg/commit/971ea9d6a… | patch |
| https://github.com/FFmpeg/FFmpeg/commit/11c4b4201… | 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-7.1-t… | third-party-advisory |
Impacted products
Date Public
2026-09-15 00:00
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CVE-2026-125107 (GCVE-0-2026-125107)
Vulnerability from cvelistv5 – Published: 2026-11-09 21:29 – Updated: 2026-11-09 21:29
VLAI
EPSS
VEX
Title
Muhammara: NULL pointer dereference in LZWDecode filter when DecodeParms omits EarlyChange key
Summary
Muhammara is a node module with c/cpp bindings to modify PDF with JavaScript for node or electron. Prior to 6.0.5, Muhammara PDFParser::CreateFilterForStream() in src/deps/PDFWriter/PDFParser.cpp dereferences a null PDFInteger pointer when a PDF stream uses the LZWDecode filter with a DecodeParms dictionary that omits the EarlyChange key. An application that processes an untrusted PDF and reads the affected stream can crash, causing a denial of service. This issue is fixed in version 6.0.5.
Severity
7.5 (High)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/julianhille/MuhammaraJS/securi… | x_refsource_CONFIRM |
| https://github.com/julianhille/MuhammaraJS/commit… | x_refsource_MISC |
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Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| julianhille | MuhammaraJS |
Affected:
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|
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CVE-2026-124311 (GCVE-0-2026-124311)
Vulnerability from cvelistv5 – Published: 2026-11-07 14:17 – Updated: 2026-11-09 22:41
VLAI
EPSS
VEX
Title
Fraunhofer HHI VVdeC through 3.2.1 NULL Pointer Dereference via InterPrediction::xPredInterBlk
Summary
Fraunhofer HHI VVdeC through 3.2.1 contains a NULL pointer dereference vulnerability in InterPrediction::xPredInterBlk that allows attackers to crash the decoder by switching SPS to enable reference wrap-around. Attackers can supply a crafted VVC bitstream activating a new SPS with sps_ref_wraparound_enabled_flag set, causing reads from missing PIC_RECON_WRAP buffers and denial of service.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 22:35 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck
CNA
References
6 references
| URL | Tags |
|---|---|
| https://github.com/fraunhoferhhi/vvdec/issues/420 | issue-tracking |
| https://github.com/fraunhoferhhi/vvdec/commit/fb7… | patch |
| https://github.com/fraunhoferhhi/vvdec/blob/v3.2.… | technical-description |
| https://github.com/fraunhoferhhi/vvdec | product |
| https://www.vulncheck.com/advisories/fraunhofer-h… | third-party-advisory |
| http://www.openwall.com/lists/oss-security/2026/1… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| fraunhoferhhi | vvdec |
Affected:
0 , ≤ 3.2.1
(semver)
|
Date Public
2026-10-12 00:00
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CVE-2026-123507 (GCVE-0-2026-123507)
Vulnerability from cvelistv5 – Published: 2026-11-08 01:37 – Updated: 2026-11-08 01:37
VLAI
EPSS
VEX
Title
Vikunja 0.24.0 before 2.7.1 Denial of Service via Nil Bucket Filter
Summary
Vikunja from 0.24.0 before 2.7.1 contains a nil pointer dereference vulnerability that allows project admins to break project views by saving a filter-mode bucket configuration with a null filter. Because validateProjectViewFilters skips nil entries, every subsequent read of the view panics in kanban and task collection code, returning HTTP 500 to all project members.
Severity
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/go-vikunja/vikunja/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/vikunja-0.24… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| go-vikunja | vikunja |
Affected:
0.24.0 , < 2.7.1
(semver)
Unaffected: 2.7.1 (semver) cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* |
Date Public
2026-10-22 00:00
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CVE-2026-123492 (GCVE-0-2026-123492)
Vulnerability from cvelistv5 – Published: 2026-11-06 15:00 – Updated: 2026-11-09 22:45
VLAI
EPSS
VEX
Title
SiYuan before 3.8.9 Nil Pointer Dereference DoS via MCP resources/read
Summary
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Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 22:34 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/siyuan-note/siyuan/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/siyuan-befor… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| siyuan-note | siyuan |
Affected:
0 , < 3.8.9
(semver)
Unaffected: 3.8.9 (semver) cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
Date Public
2026-10-22 00:00
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CVE-2026-121522 (GCVE-0-2026-121522)
Vulnerability from cvelistv5 – Published: 2026-11-03 22:09 – Updated: 2026-11-06 19:31
VLAI
EPSS
VEX
Title
Possible panic from Git source resolver
Summary
In BuildKit versions v0.26.0 through v0.34.1, a specific build definition that resolves metadata for the same Git source reference twice can cause the BuildKit daemon to panic and crash, interrupting builds handled by that daemon. The issue is fixed in v0.34.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 19:31 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
Docker
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/moby/buildkit/security/advisor… | vendor-advisory |
Impacted products
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CVE-2026-121402 (GCVE-0-2026-121402)
Vulnerability from cvelistv5 – Published: 2026-11-03 14:28 – Updated: 2026-11-07 02:51
VLAI
EPSS
VEX
Title
FreeRDP before 3.32.2 X11 Client Crash via Zero-Width RDPGFX ResetGraphics
Summary
FreeRDP before 3.32.2 contains a NULL pointer dereference vulnerability that allows malicious RDP servers to crash xfreerdp clients by sending a zero-width RDPGFX ResetGraphics PDU. The failed resize in gdi_resize_ex leaves the primary display null without ending the session, so a later bitmap update crashes the client in gdi_Bitmap_Paint.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-07 02:51 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/freerdp-befo… | third-party-advisory |
Impacted products
Date Public
2026-10-19 00:00
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CVE-2026-121401 (GCVE-0-2026-121401)
Vulnerability from cvelistv5 – Published: 2026-11-03 14:28 – Updated: 2026-11-03 16:08
VLAI
EPSS
VEX
Title
FreeRDP before 3.32.2 Denial of Service via RD Gateway extended-auth packet
Summary
FreeRDP before 3.32.2 contains a denial of service vulnerability where rdg_process_packet dispatches a PKT_TYPE_EXTENDED_AUTH_MSG without verifying negotiated mode or auth context. A malicious or compromised RD Gateway can send the extended-auth packet before tunnel authentication, triggering a null-pointer dereference that crashes the client.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 16:07 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/freerdp-befo… | third-party-advisory |
Impacted products
Date Public
2026-10-19 00:00
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Mitigation MIT-56
Implementation
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].
Mitigation
Requirements
Select a programming language that is not susceptible to these issues.
Mitigation
Implementation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation
Architecture and Design
Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.
Mitigation
Implementation
Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.
No CAPEC attack patterns related to this CWE.