CVE-2024-49864

Summary

In the Linux kernel, the following vulnerability has been resolved:

rxrpc: Fix a race between socket set up and I/O thread creation

In rxrpc_open_socket(), it sets up the socket and then sets up the I/O thread that will handle it. This is a problem, however, as there's a gap between the two phases in which a packet may come into rxrpc_encap_rcv() from the UDP packet but we oops when trying to wake the not-yet created I/O thread.

As a quick fix, just make rxrpc_encap_rcv() discard the packet if there's no I/O thread yet.

A better, but more intrusive fix would perhaps be to rearrange things such that the socket creation is done by the I/O thread.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa275da62e8c111b897b9cb73eb91df2f4e475ca5 < cdf4bbbdb956d7426f687f38757ebca2a2759a0faffected
LinuxLinuxa275da62e8c111b897b9cb73eb91df2f4e475ca5 < 56e415202b8a17de6496f4023e545fcb66f118ecaffected
LinuxLinuxa275da62e8c111b897b9cb73eb91df2f4e475ca5 < c64f5fc95e9612fdf75587c8e21e494e614c18e2affected
LinuxLinuxa275da62e8c111b897b9cb73eb91df2f4e475ca5 < bc212465326e8587325f520a052346f0b57360e6affected
LinuxLinux6.2affected
LinuxLinux0 < 6.2unaffected
LinuxLinux6.6.55 <= 6.6.*unaffected
LinuxLinux6.10.14 <= 6.10.*unaffected
LinuxLinux6.11.3 <= 6.11.*unaffected
LinuxLinux6.12 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References