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CVE-2022-48724

iommu/vt-d: Fix potential memory leak in intel_setup_irq_remapping()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.14.265, 4.19.228, 5.4.178, 5.8
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: iommu/vt-d: Fix potential memory leak in intel_setup_irq_remapping() After commit e3beca48a45b ("irqdomain/treewide: Keep firmware node unconditionally allocated"). For tear down scenario, fn is only freed after fail to allocate ir_domain, though it also should be freed in case dmar_enable_qi returns error. Besides free fn, irq_domain and ir_msi_domain need to be removed as well if intel_setup_irq_remapping fails to enable queued invalidation. Improve the rewinding path by add out_free_ir_domain and out_free_fwnode lables per Baolu's suggestion.

Timeline

  1. CVE published
  2. CISA SSVC assessment

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

  3. Record last updated

Affected versions

  • Linux Linux

    From 4.14.190 · fixed in 4.14.265; From 4.19.135 · fixed in 4.19.228; From 5.4.54 · fixed in 5.4.178; From 5.7.11 · fixed in 5.8

  • Linux Linux

    5.8

References 7

git.kernel.org