What’s Vulnerable › Vulnerabilities

CVE-2025-68315: f2fs: fix to detect potential corrupted nid in free_nid_list

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-16 · updated 2026-10-14

Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to detect potential corrupted nid in free_nid_list As reported, on-disk footer.ino and footer.nid is the same and out-of-range, let's add sanity check on f2fs_alloc_nid() to detect any potential corruption in free_nid_list.

Affected products

• Linux kernel: 3.8 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/6b9525596a83cd5b7bbc2c7bd5f9ad9cf5ad60fa
• https://git.kernel.org/stable/c/88b2ddb0c4f1dc874d4598e78cc830c64315ed86
• https://git.kernel.org/stable/c/8fc6056dcf79937c46c97fa4996cda65956437a9
• https://git.kernel.org/stable/c/9337ed5e777e1c19854928cba7a8131dd00e611b
• https://git.kernel.org/stable/c/adbcb34f03abb89e681a5907c4c3ce4bf224991d

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