What’s Vulnerable › Vulnerabilities

CVE-2025-68733: smack: fix bug: unprivileged task can create labels

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-24 · updated 2026-10-13

Description

In the Linux kernel, the following vulnerability has been resolved: smack: fix bug: unprivileged task can create labels If an unprivileged task is allowed to relabel itself (/smack/relabel-self is not empty), it can freely create new labels by writing their names into own /proc/PID/attr/smack/current This occurs because do_setattr() imports the provided label in advance, before checking "relabel-self" list. This change ensures that the "relabel-self" list is checked before importing the label.

Affected products

• Linux kernel: 4.4 — fixed in 6.19

How to fix

Upgrade to a fixed version: Linux kernel 6.19. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4a7a7621619a366712fb9cefcb6e69f956c247ce
• https://git.kernel.org/stable/c/60e8d49989410a7ade60f5dadfcd979c117d05c0
• https://git.kernel.org/stable/c/64aa81250171b6bb6803e97ea7a5d73bfa061f6e
• https://git.kernel.org/stable/c/6b1e45e13546c9ea0b1d99097993ac0aafae90b1
• https://git.kernel.org/stable/c/ac9fce2efabad37c338aac86fbe100f77a080e59
• https://git.kernel.org/stable/c/c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3
• https://git.kernel.org/stable/c/c80173233014a360c13fa5cc79d36bfe6e53a8ed
• https://git.kernel.org/stable/c/f8fd5491100f920847a3338d5fba22db19c72773

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