CVE-2026-49419 : 詳細

CVE-2026-49419

2026-08-19
04h32 +00:00
2026-08-20
18h35 +00:00
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CVE の説明

Jail reference count underflow

When the JAIL_AT_DESC flag is specified, kern_jail_set() and kern_jail_get() released the reference to the caller's current prison before looking up the jail descriptor. If the descriptor lookup failed, error-handling paths released the same reference a second time. An unprivileged local user can trigger a prison reference count underflow, which may cause the prison structure to be freed while still in use. When this is done on the jail host, the bug will generally result in an immediate panic. However, if the user is running in a jail, then it may be possible to exploit the bug to elevate privileges.

CVE の情報

関連する弱点

CWE-ID 弱点名 出典
CWE-911 Improper Update of Reference Count
The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count.

参考資料