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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2022-48771

drm/vmwgfx: Fix stale file descriptors on failed usercopy

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Fix stale file descriptors on failed usercopy A failing usercopy of the fence_rep object will lead to a stale entry in the file descriptor table as put_unused_fd() won't release it. This enables userland to refer to a dangling 'file' object through that still valid file descriptor, leading to all kinds of use-after-free exploitation scenarios. Fix this by deferring the call to fd_install() until after the usercopy has succeeded.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c906965dee22d5e95d0651759ba107b420212a9f to < e8d092a62449dcfc73517ca43963d2b8f44d0516affected
  • c906965dee22d5e95d0651759ba107b420212a9f to < 0008a0c78fc33a84e2212a7c04e6b21a36ca6f4daffected
  • c906965dee22d5e95d0651759ba107b420212a9f to < 84b1259fe36ae0915f3d6ddcea6377779de48b82affected
  • c906965dee22d5e95d0651759ba107b420212a9f to < ae2b20f27732fe92055d9e7b350abc5cdf3e2414affected
  • c906965dee22d5e95d0651759ba107b420212a9f to < 6066977961fc6f437bc064f628cf9b0e4571c56caffected
  • c906965dee22d5e95d0651759ba107b420212a9f to < 1d833b27fb708d6fdf5de9f6b3a8be4bd4321565affected
  • c906965dee22d5e95d0651759ba107b420212a9f to < a0f90c8815706981c483a652a6aefca51a5e191caffected

Linux Linux

Default version status: affected

  • 4.14affected
  • 0 to < 4.14unaffected
  • 4.14.264 to ≤ 4.14.*unaffected
  • 4.19.227 to ≤ 4.19.*unaffected
  • 5.4.175 to ≤ 5.4.*unaffected
  • 5.10.95 to ≤ 5.10.*unaffected
  • 5.15.18 to ≤ 5.15.*unaffected
  • 5.16.4 to ≤ 5.16.*unaffected
  • 5.17 to ≤ *unaffected

References