What’s Vulnerable › Vulnerabilities

CVE-2022-48804: vt_ioctl: fix array_index_nospec in vt_setactivate

• 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: 2024-07-16 · updated 2026-06-17
• Weakness: CWE-191

Description

In the Linux kernel, the following vulnerability has been resolved: vt_ioctl: fix array_index_nospec in vt_setactivate array_index_nospec ensures that an out-of-bounds value is set to zero on the transient path. Decreasing the value by one afterwards causes a transient integer underflow. vsa.console should be decreased first and then sanitized with array_index_nospec. Kasper Acknowledgements: Jakob Koschel, Brian Johannesmeyer, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida from the VUSec group at VU Amsterdam.

Affected products

• Linux kernel: before 4.9.302; from 4.10 before 4.14.267; from 4.15 before 4.19.320; from 4.20 before 5.4.180; from 5.5 before 5.10.101; from 5.11 before 5.15.24 — fixed in 4.14.267, 4.19.320, 4.9.302, 5.10.101, 5.15.24, 5.16.10

How to fix

Upgrade to a fixed version: Linux kernel 4.14.267, 4.19.320, 4.9.302, 5.10.101. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/170325aba4608bde3e7d21c9c19b7bc266ac0885
• https://git.kernel.org/stable/c/2a45a6bd1e6d651770aafff57ab3e1d3bb0b42e0
• https://git.kernel.org/stable/c/61cc70d9e8ef5b042d4ed87994d20100ec8896d9
• https://git.kernel.org/stable/c/6550bdf52846f85a2a3726a5aa0c7c4399f2fc02
• https://git.kernel.org/stable/c/778302ca09498b448620edd372dc908bebf80bdf
• https://git.kernel.org/stable/c/830c5aa302ec16b4ee641aec769462c37f802c90
• https://git.kernel.org/stable/c/ae3d57411562260ee3f4fd5e875f410002341104
• https://git.kernel.org/stable/c/ffe54289b02e9c732d6f04c8ebbe3b2d90d32118
• https://git.kernel.org/stable/c/170325aba4608bde3e7d21c9c19b7bc266ac0885
• https://git.kernel.org/stable/c/2a45a6bd1e6d651770aafff57ab3e1d3bb0b42e0
• https://git.kernel.org/stable/c/61cc70d9e8ef5b042d4ed87994d20100ec8896d9
• https://git.kernel.org/stable/c/6550bdf52846f85a2a3726a5aa0c7c4399f2fc02

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