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CVE PROGRAM SOURCE RECORD7.0 High

CVE-2026-45998

rxrpc: Fix potential UAF after skb_unshare() failure

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix potential UAF after skb_unshare() failure If skb_unshare() fails to unshare a packet due to allocation failure in rxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread()) will be NULL'd out. This will likely cause the call to trace_rxrpc_rx_done() to oops. Fix this by moving the unsharing down to where rxrpc_input_call_event() calls rxrpc_input_call_packet(). There are a number of places prior to that where we ignore DATA packets for a variety of reasons (such as the call already being complete) for which an unshare is then avoided. And with that, rxrpc_input_packet() doesn't need to take a pointer to the pointer to the packet, so change that to just a pointer.

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

  • 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 to < e3bf143b1e98fb3d6d9e6825bcd683974d478e8caffected
  • 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 to < bf20f46d94f1db38e6ffc0ca204a5fe0de01b495affected
  • 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 to < 996b0487b3cdda4c91811dbb1c9564626bc840bdaffected
  • 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 to < 8fde6296c4d4da2be7ab761305ab7f232b94eefdaffected
  • 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 to < 1f2740150f904bfa60e4bad74d65add3ccb5e7f8affected

Linux Linux

Default version status: affected

  • 6.2affected
  • 0 to < 6.2unaffected
  • 6.6.140 to ≤ 6.6.*unaffected
  • 6.12.86 to ≤ 6.12.*unaffected
  • 6.18.27 to ≤ 6.18.*unaffected
  • 7.0.4 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References