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CVE-2022-48804

vt_ioctl: fix array_index_nospec in vt_setactivate

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.9.302, 4.14.267, 3.17, 4.5, 4.19
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From 4.9.130 · fixed in 4.9.302; From 4.14.73 · fixed in 4.14.267; From 3.16.62 · fixed in 3.17; From 4.4.159 · fixed in 4.5; From 4.18.11 · fixed in 4.19

  • Linux Linux

    4.19

References 8

git.kernel.org