What’s Vulnerable › Vulnerabilities

CVE-2022-49553: fs/ntfs3: validate BOOT sectors_per_clusters

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-08-04
• Weakness: CWE-190

Description

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: validate BOOT sectors_per_clusters When the NTFS BOOT sectors_per_clusters field is > 0x80, it represents a shift value. Make sure that the shift value is not too large before using it (NTFS max cluster size is 2MB). Return -EVINVAL if it too large. This prevents negative shift values and shift values that are larger than the field size. Prevents this UBSAN error: UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16 shift exponent -192 is negative

Affected products

• Linux kernel: from 5.15 before 5.15.45; from 5.16 before 5.17.13; from 5.18 before 5.18.2 — fixed in 5.15.45, 5.17.13, 5.18.2

How to fix

Upgrade to a fixed version: Linux kernel 5.15.45, 5.17.13, 5.18.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4746c49b11b2403f5b5b07c6eac9e60663dcd9a3
• https://git.kernel.org/stable/c/58cf68a1886d14ffdc5c892ce483a82156769e88
• https://git.kernel.org/stable/c/a2b6986316a2d106f6951e76db70fa4b2fde64a9
• https://git.kernel.org/stable/c/a3b774342fa752a5290c0de36375289dfcf4a260

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