What’s Vulnerable › Vulnerabilities

CVE-2022-49289: uaccess: fix integer overflow on access_ok()

• Severity: high (CVSS 7.1 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: uaccess: fix integer overflow on access_ok() Three architectures check the end of a user access against the address limit without taking a possible overflow into account. Passing a negative length or another overflow in here returns success when it should not. Use the most common correct implementation here, which optimizes for a constant 'size' argument, and turns the common case into a single comparison.

Affected products

• Linux kernel: from 3.2 before 5.15.32; from 5.16 before 5.16.18; 5.17 — fixed in 5.15.32, 5.16.18

How to fix

Upgrade to a fixed version: Linux kernel 5.15.32, 5.16.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/222ca305c9fd39e5ed8104da25c09b2b79a516a8
• https://git.kernel.org/stable/c/99801e2f457824955da4aadaa035913a6dede03a
• https://git.kernel.org/stable/c/a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8
• https://git.kernel.org/stable/c/e65d28d4e9bf90a35ba79c06661a572a38391dec

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