What’s Vulnerable › Vulnerabilities

CVE-2023-53695: udf: Detect system inodes linked into directory hierarchy

• Severity: high (CVSS 7.8 v3.1)
• 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: 2025-10-22 · updated 2026-10-28

Description

In the Linux kernel, the following vulnerability has been resolved: udf: Detect system inodes linked into directory hierarchy When UDF filesystem is corrupted, hidden system inodes can be linked into directory hierarchy which is an avenue for further serious corruption of the filesystem and kernel confusion as noticed by syzbot fuzzed images. Refuse to access system inodes linked into directory hierarchy and vice versa.

Affected products

• Linux kernel: from 3.17.2 before 3.18; 3.18 — fixed in 3.18, 6.3

How to fix

Upgrade to a fixed version: Linux kernel 3.18, 6.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1dc71eeb198a8daa17d0c995998a53b0b749a158
• https://git.kernel.org/stable/c/1f328751b65c49c13a312d67a3bf27766b85baf7
• https://git.kernel.org/stable/c/37e74003d81e79457535cbbdfa1603431c03fac0
• https://git.kernel.org/stable/c/85a37983ec69cc9fcd188bc37c4de15ee326355a
• https://git.kernel.org/stable/c/9e3b5ef7d02eaa6553e79b4af9bd99227280f245
• https://git.kernel.org/stable/c/a44ec34b90440ada190924f5908b97026504fdcd
• https://git.kernel.org/stable/c/d747b31e2925a2f384e7dd1901a2e5bc5f984ed8

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