What’s Vulnerable › Vulnerabilities

CVE-2022-50205: ext2: Add more validity checks for inode counts

• 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: 2025-06-18 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: ext2: Add more validity checks for inode counts Add checks verifying number of inodes stored in the superblock matches the number computed from number of inodes per group. Also verify we have at least one block worth of inodes per group. This prevents crashes on corrupted filesystems.

Affected products

• Linux kernel: before 4.14.291; from 4.15 before 4.19.256; from 4.20 before 5.4.211; from 5.5 before 5.10.137; from 5.11 before 5.15.61; from 5.16 before 5.18.18 — fixed in 4.14.291, 4.19.256, 5.10.137, 5.15.61, 5.18.18, 5.19.2

How to fix

Upgrade to a fixed version: Linux kernel 4.14.291, 4.19.256, 5.10.137, 5.15.61. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/07303a9abe3a997d9864fb4315e34b5acfe8fc25
• https://git.kernel.org/stable/c/0bcdc31094a12b4baf59e241feabc9787cf635fa
• https://git.kernel.org/stable/c/5e63c5fe9123fa76ffaeff26c211308736ec3a07
• https://git.kernel.org/stable/c/7a48fdc88a3c35e046a6a0a38eba00f21c65b16e
• https://git.kernel.org/stable/c/96b18d3a1be0354ccce43f0ef61b5a3d7e432552
• https://git.kernel.org/stable/c/b3f423683818cfe15de14d5d9dff44148ff16bbf
• https://git.kernel.org/stable/c/d08bb199a406424a8ed0009efdf41710e6d849ee
• https://git.kernel.org/stable/c/fa78f336937240d1bc598db817d638086060e7e9

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