CVE-2026-99129
Received Received - Intake

BaseFortify

Publication date: 2026-10-28

Last updated on: 2026-10-28

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: selinux: fix BPF token permission checks Avoid multiple lookups of the bpffs creator SID using the token's file descriptor when the same information can be found via the resolved path/dentry (in selinux_bpf_token_create()) or the token itself (in selinux_bpf_map_create() and selinux_bpf_prog_load()). Not only does this simplify the code, it avoids potential TOCTOU issues if the user changes the token file descriptor passed into the kernel.

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Meta Information

Published
2026-10-28
Last Modified
2026-10-28
Generated
2026-10-28
AI Q&A
2026-10-28
EPSS Evaluated
N/A
NVD
CVE-2026-99129
EUVD
EUVD-2026-111881

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
Linux Linux 5473a722f782f79f96b4691400d681c01fcacc2f
Linux Linux 5473a722f782f79f96b4691400d681c01fcacc2f
Linux Linux 7.0

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves SELinux incorrectly handling BPF token permission checks. It allows multiple lookups of the bpffs creator SID using a token's file descriptor instead of using the resolved path or token itself. This creates potential TOCTOU (Time-of-Check to Time-of-Use) issues if the user modifies the token file descriptor after the check.

Impact Analysis

This vulnerability could allow local users to escalate privileges by manipulating BPF token file descriptors to bypass intended SELinux restrictions. It may lead to unauthorized access to sensitive system resources or data.

Mitigation Strategies

Update your Linux kernel to the latest patched version to resolve the SELinux BPF token permission checks issue. Monitor vendor advisories for kernel updates addressing CVE-2026-99129.

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