What’s Vulnerable › Vulnerabilities

CVE-2022-48938: CDC-NCM: avoid overflow in sanity checking

• Severity: medium (CVSS 5.5 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: 2024-08-22 · updated 2026-06-17
• Weakness: CWE-190

Description

In the Linux kernel, the following vulnerability has been resolved: CDC-NCM: avoid overflow in sanity checking A broken device may give an extreme offset like 0xFFF0 and a reasonable length for a fragment. In the sanity check as formulated now, this will create an integer overflow, defeating the sanity check. Both offset and offset + len need to be checked in such a manner that no overflow can occur. And those quantities should be unsigned.

Affected products

• Linux kernel: before 5.10.103; from 5.11 before 5.15.26; from 5.16 before 5.16.12 — fixed in 5.10.103, 5.15.26, 5.16.12

How to fix

Upgrade to a fixed version: Linux kernel 5.10.103, 5.15.26, 5.16.12. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/49909c9f8458cacb5b241106cba65aba5a6d8f4c
• https://git.kernel.org/stable/c/69560efa001397ebb8dc1c3e6a3ce00302bb9f7f
• https://git.kernel.org/stable/c/7b737e47b87589031f0d4657f6d7b0b770474925
• https://git.kernel.org/stable/c/8d2b1a1ec9f559d30b724877da4ce592edc41fdc
• https://git.kernel.org/stable/c/9957fbf34f52a4d8945d1bf39aae400ef9a11246
• https://git.kernel.org/stable/c/a612395c7631918e0e10ea48b9ce5ab4340f26a6

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