CVEbaza.plCWE DictionaryCWE-403
Common Weakness Enumeration

CWE-403

Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak')

Category: BaseCVE: 8
Description

A process does not close sensitive file descriptors before invoking a child process, which allows the child to perform unauthorized I/O operations using those descriptors.

Extended Description

When a new process is forked or executed, the child process inherits any open file descriptors. When the child process has fewer privileges than the parent process, this might introduce a vulnerability if the child process can access the file descriptor but does not have the privileges to access the associated file.

CVE vulnerabilities with CWE-403 (8)
9.6
CVSS
CRITICAL
CVE-2026-12296

Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

pub. 2026-06-16
9.3
CVSS
CRITICAL
CVE-2026-40042

Pachno 1.0.6 contains an XML external entity injection vulnerability that allows unauthenticated attackers to read arbitrary files by exploiting unsafe XML parsing in the TextParser helper. Attackers can inject malicious XML entities through wiki table syntax and inline tags in issue descriptions, comments, and wiki articles to trigger entity resolution via simplexml_load_string() without LIBXML_NONET restrictions.

pub. 2026-04-13
9.3
CVSS
CRITICAL
CVE-2025-15114

Ksenia Security lares (legacy model) Home Automation version 1.6 contains a critical security flaw that exposes the alarm system PIN in the 'basisInfo' XML file after authentication. Attackers can retrieve the PIN from the server response to bypass security measures and disable the alarm system without additional authentication.

pub. 2025-12-30
8.8
CVSS
HIGH
CVE-2026-16526

A flaw in the PCP linux_sockets module exposes an unsecured internal connection. An attacker with initial code execution can exploit this to escalate privileges and execute arbitrary commands as root.

pub. 2026-07-30
8.6
CVSS
HIGH
CVE-2024-58280

CMSimple 5.15 contains a remote command execution vulnerability that allows authenticated attackers to modify file extensions and upload malicious PHP files. Attackers can append ',php' to Extensions_userfiles and upload a shell script to the media directory to execute arbitrary code on the server.

pub. 2025-12-10
8.6
CVSS
HIGH
CVE-2024-21626

runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem ("attack 2"). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run ("attack 1"). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes ("attack 3a" and "attack 3b"). runc 1.1.12 includes patches for this issue.

pub. 2024-01-31
7.4
CVSS
HIGH
CVE-2025-3032

Leaking of file descriptors from the fork server to web content processes could allow for privilege escalation attacks. This vulnerability was fixed in Firefox 137 and Thunderbird 137.

pub. 2025-04-01
4.3
CVSS
MEDIUM
CVE-2026-33263

When mail_max_userip_connections is set (default 10) and reached, submission-login can crash with epoll() panic caused by file descriptor handling issues. If running in high-security mode (default for community releases), only the new submission connection gets terminated. If running in high-performance mode (default for Pro releases), all connections handled by the submission-login process will be terminated. The crashes can cause failure for user to send a message, or it can cause duplicate messages to be sent. If TLS is not used (in the backend server processing the submission), duplicate deliveries cannot happen, because the crash can only happen at AUTH stage. Limit the number of connections handled by single submission-login process. This has a performance impact though. Update to non-vulnerable version. No publicly available exploits are known.

pub. 2026-08-28
Information
ID: CWE-403
Type: Base
Vulnerabilities: 8
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