GHSA-4g75-9r48-jf92 CVE-2026-46693
ImageMagick: Race Condition in distributed pixel cache server can result in file descriptor hijacking
Medium
NuGet
- Severity
- 4.1 / 10
- Medium · CVSS 3.1
- Exploit chance (EPSS)
- 0.08%
- Chance of exploitation in the next 30 days. Higher than 0.10% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
- CWE-567 Unsynchronized Access to Shared Data in a Multithreaded Context
- Fix
- Available
- 17 packages have a fixed version
Description
An attacker who can connect to a magick -distribute-cache service can hijack a file descriptor in the server process when a race condition is met.
Affected versions
NuGet
| Package | Vulnerable | Fixed in |
|---|---|---|
| Magick.NET-Q16-AnyCPU | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-AnyCPU | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-OpenMP-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-x86 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-OpenMP-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-OpenMP-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-x86 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-AnyCPU | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-OpenMP-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-OpenMP-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-x86 | < 14.12.0 |
14.12.0 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
Magick.NET-Q16-AnyCPU NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-AnyCPU --version 14.12.0
Magick.NET-Q16-HDRI-AnyCPU NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.12.0
Magick.NET-Q16-HDRI-OpenMP-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.12.0
Magick.NET-Q16-HDRI-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-arm64 --version 14.12.0
Magick.NET-Q16-HDRI-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-x64 --version 14.12.0
Magick.NET-Q16-HDRI-x86 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.12.0
Magick.NET-Q16-OpenMP-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-OpenMP-arm64 --version 14.12.0
Magick.NET-Q16-OpenMP-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-OpenMP-x64 --version 14.12.0
Magick.NET-Q16-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-arm64 --version 14.12.0
Magick.NET-Q16-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-x64 --version 14.12.0
Magick.NET-Q16-x86 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-x86 --version 14.12.0
Magick.NET-Q8-AnyCPU NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-AnyCPU --version 14.12.0
Magick.NET-Q8-OpenMP-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-OpenMP-arm64 --version 14.12.0
Magick.NET-Q8-OpenMP-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-OpenMP-x64 --version 14.12.0
Magick.NET-Q8-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-arm64 --version 14.12.0
Magick.NET-Q8-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-x64 --version 14.12.0
Magick.NET-Q8-x86 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-x86 --version 14.12.0
Severity breakdown
CVSS 3.1 4.1
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Weakness
CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
How to prevent it
- Architecture and Design: In languages that support it, use synchronization primitives. Only wrap these around critical code to minimize the impact on performance.
- Architecture and Design: Use thread-safe capabilities such as the data access abstraction in Spring.
- Architecture and Design: Minimize the usage of shared resources in order to remove as much complexity as possible from the control flow and to reduce the likelihood of unexpected conditions occurring. Additionally, this will minimize the amount of synchronization necessary and may even help to reduce the likelihood of a denial of service where an attacker may be able to repeatedly trigger a critical section (CWE-400).
- Implementation: When using multithreading and operating on shared variables, only use thread-safe functions.
- Implementation: Use atomic operations on shared variables. Be wary of innocent-looking constructs such as "x++". This may appear atomic at the code layer, but it is actually non-atomic at the instruction layer, since it involves a read, followed by a computation, followed by a write.
- Implementation: Use a mutex if available, but be sure to avoid related weaknesses such as CWE-412.
- Implementation: Avoid double-checked locking (CWE-609) and other implementation errors that arise when trying to avoid the overhead of synchronization.
- Implementation: Disable interrupts or signals over critical parts of the code, but also make sure that the code does not go into a large or infinite loop.
- Implementation: Use the volatile type modifier for critical variables to avoid unexpected compiler optimization or reordering. This does not necessarily solve the synchronization problem, but it can help.
- Architecture and Design, Operation: Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
CWE-567: Unsynchronized Access to Shared Data in a Multithreaded Context
The product does not properly synchronize shared data, such as static variables across threads, which can lead to undefined behavior and unpredictable data changes.
How to prevent it
- Implementation: Remove the use of static variables used between servlets. If this cannot be avoided, use synchronized access for these variables.
References
Advisories
Packages
Other links
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-j7hp-h8jx-5ppr libwebp: OOB write in BuildHuffmanTable | High Known exploited | Also affects magick.net-q16-anycpu |
| GHSA-cvhv-g4rq-3hmw ImageMagick: Memory Leak when providing invalid options to the cli | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-h22j-f9xw-xjjm ImageMagick: Integer Overflow in JNX decoder causes heap buffer over-write when processing extremly large files on 32-bit builds | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-422r-8c97-xcg4 ImageMagick: Heap Buffer Over-Write in fx operation | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-f5m7-cqgw-8hm7 ImageMagick: Heap Buffer Over-Write in morphology operation when an invalid kernel is provided | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-hc76-7mpc-qjqh ImageMagick: Code injection in HTML encoder due to incomplete fix of CVE-2026-25797 | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-56m6-8q75-f2rw ImageMagick: Policy Bypass due to an incomplete fix of CVE-2026-49219 | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-h5r4-w88w-7ccr ImageMagick: Memory Leak in TIFF encoder when invalid tiff:tile-geometry is specified | Low | Also affects Magick.NET-Q16-AnyCPU |
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